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revision 1478 by frank, Thu Jul 24 17:00:25 2003 UTC revision 1532 by frank, Thu Jul 31 10:58:24 2003 UTC
# Line 1  Line 1 
1  <?xml version="1.0" encoding="ISO-8859-1"?>  <?xml version="1.0" encoding="ISO-8859-1"?>
2  <!DOCTYPE book  <!DOCTYPE book
3          PUBLIC "-//OASIS//DTD DocBook XML V4.2//EN"          PUBLIC "-//OASIS//DTD DocBook XML V4.2//EN"
4          "http://www.oasis-open.org/docbook/xml/4.2/docbookx.dtd">          "http://www.oasis-open.org/docbook/xml/4.2/docbookx.dtd"
5        [<!ENTITY imgscale "70">]>
6  <!-- $Revision$ -->  <!-- $Revision$ -->
7  <book>  <book>
8    <bookinfo>    <bookinfo>
# Line 47  Line 48 
48          <section><title>Installation</title>          <section><title>Installation</title>
49          <para>          <para>
50          Thuban is actively supported under Debian Testing (sarge), RedHat 7.2,          Thuban is actively supported under Debian Testing (sarge), RedHat 7.2,
51          and Windows 2000. All the necessary files can be found on the          and Windows 2000. The following list of files that Thuban requires
52            can be found on the
53          <ulink url="http://thuban.intevation.org/download.html">          <ulink url="http://thuban.intevation.org/download.html">
54          Thuban Download site          Thuban Download site
55          </ulink>.          </ulink>.
56            <variablelist>
57            <varlistentry>
58            <term>Debian Testing (sarge)</term>
59            <listitem>
60            <itemizedlist>
61                <listitem><para>Thuban-0.8.1-1-debian.i386.rpm</para></listitem>
62                <listitem><para>GTK 1.2.3</para></listitem>
63                <listitem><para>Python 2.2.1</para></listitem>
64                <listitem><para>Python 2.2 XML Base Tools</para></listitem>
65                <listitem><para>wxWindows 2.4</para></listitem>
66                <listitem><para>wxWindows 2.4 Python Bindings</para></listitem>
67                <listitem><para>proj 4.4.5 Projection Library</para></listitem>
68                <listitem><para>SQLite Python Bindings 0.4.3</para></listitem>
69                <listitem><para>GDAL 1.1.8</para></listitem>
70            </itemizedlist>
71            </listitem>
72            </varlistentry>
73            <varlistentry>
74            <term>RedHat 7.2</term>
75            <listitem>
76            <itemizedlist>
77                <listitem><para>Thuban-0.8.1-1.i386.rpm</para></listitem>
78                <listitem><para>Python 2.2.1</para></listitem>
79                <listitem><para>wxPython 2.4 for Python 2.2 with wxGTK</para></listitem>
80                <listitem><para>proj 4.4.5 Projection Library</para></listitem>
81                <listitem><para>SQLite 2.8.3</para></listitem>
82                <listitem><para>PySQLite 0.4.3</para></listitem>
83                <listitem><para>GDAL 1.1.8</para></listitem>
84            </itemizedlist>
85            </listitem>
86            </varlistentry>
87            <varlistentry>
88            <term>Windows 2000</term>
89            <listitem>
90            <itemizedlist>
91                <listitem><para>Thuban-0.8.1-0.exe</para></listitem>
92                <listitem><para>Python 2.2.1</para></listitem>
93                <listitem><para>wxWindows 2.4 for Python 2.2</para></listitem>
94                <listitem><para>SQLite Python Libraries</para></listitem>
95                <listitem><para>GDAL for Thuban</para></listitem>
96            </itemizedlist>
97            </listitem>
98            </varlistentry>
99            </variablelist>
100          </para>          </para>
101          </section>          </section>
102    
103          <section><title>The Main Window</title>          <section><title>The Main Window</title>
104          <para>          <para>
105          <screenshot>          <figure>
106          <screeninfo>The Main Window</screeninfo>          <title>The Main Window</title>
107          <mediaobject>          <mediaobject>
108          <imageobject> <imagedata fileref="../images/1_2_mainwindow.png" format="PNG"/> </imageobject>          <imageobject> <imagedata fileref="../images/1_2_mainwindow.png" format="PNG" scale="&imgscale;"/> </imageobject>
109          <imageobject> <imagedata fileref="./images/1_2_mainwindow.ps" format="EPS"/> </imageobject>          <imageobject> <imagedata fileref="./images/1_2_mainwindow.ps" format="EPS" scale="&imgscale;"/> </imageobject>
         <textobject><phrase>The Main Window</phrase></textobject>  
         <caption><para>The Main Window</para></caption>  
110          </mediaobject>          </mediaobject>
111          </screenshot>          </figure>
112          </para>          </para>
113    
114          <para>          <para>
# Line 100  Line 144 
144          The tool bar provides quick access to the commonly needed tools.          The tool bar provides quick access to the commonly needed tools.
145          By hovering over each button the user can see a short messages          By hovering over each button the user can see a short messages
146          describing what the tool does. The tools provided are Zoom In, Zoom          describing what the tool does. The tools provided are Zoom In, Zoom
147          Out, Pan, Full Extent, Full Layer Extent, Full Shape Extent, Indentify,          Out, Pan, Full Extent, Full Layer Extent, Full Shape Extent, Identify,
148          and Label. Each of the tools will be explained in further detail later          and Label. Each of the tools will be explained in further detail later
149          in the manual.          in the manual.
150          </para>          </para>
# Line 116  Line 160 
160          <menuchoice>          <menuchoice>
161          <guimenu>File</guimenu>          <guimenu>File</guimenu>
162          <guimenuitem>New Session</guimenuitem>          <guimenuitem>New Session</guimenuitem>
163          </menuchoice>.          </menuchoice>.
   
164          If a session is already loaded and has been modified without          If a session is already loaded and has been modified without
165          being saved a prompt will ask if the current session should          being saved a prompt will ask if the current session should
166          be saved.          be saved. A new session consists of an empty map with no
167            layers and no tables.
168          </para>          </para>
169          </section>          </section>
170    
# Line 131  Line 174 
174          <menuchoice>          <menuchoice>
175          <guimenu>File</guimenu>          <guimenu>File</guimenu>
176          <guimenuitem>Open Session</guimenuitem>          <guimenuitem>Open Session</guimenuitem>
177          </menuchoice>.          </menuchoice>. A dialog box will open allowing the user to browse
178            for a Thuban Session file. Thuban session files end with
179            <varname>.thuban</varname>. Selecting a file a clicking
180            <guibutton>OK</guibutton> will load the session into Thuban.
181    
182          If a session is already loaded and has been modified without          If a session is already loaded and has been modified without
183          being saved a prompt will ask if the current session should          being saved a prompt will ask if the current session should
# Line 145  Line 191 
191          <menuchoice>          <menuchoice>
192          <guimenu>File</guimenu>          <guimenu>File</guimenu>
193          <guimenuitem>Save Session</guimenuitem>          <guimenuitem>Save Session</guimenuitem>
194          </menuchoice>.          </menuchoice>. A dialog box will open allowing the user to browse
195            the file system and select a place to save the session. Thuban
196            sessions should be saved under a name ending in
197            <varname>.thuban</varname>. If the file already exists the user
198            will be prompted to save under a different name or overwrite the
199            existing file.
200          </para>          </para>
201          </section>          </section>
202    
203          <section><title>The Session Info-Tree</title>          <section><title>The Session Info-Tree</title>
204            <para>
205            <figure>
206            <title>Session Info Tree</title>
207            <mediaobject>
208            <imageobject><imagedata fileref="../images/2_4_session_tree.png" format="PNG" scale="&imgscale;"/></imageobject>
209            <imageobject><imagedata fileref="./images/2_4_session_tree.eps" format="EPS" scale="&imgscale;"/></imageobject>
210            </mediaobject>
211            </figure>
212            </para>
213          <para>          <para>
214                  (primarily for developers)          The session info-tree is primarily intended for developers working
215            with Thuban. It displays many of the internal values for the session,
216            map, and layers. It can be opened from
217            <menuchoice>
218            <guimenu>File</guimenu>
219            <guimenuitem>Session Tree</guimenuitem>
220            </menuchoice>.
221          </para>          </para>
222          </section>          </section>
223    </chapter>    </chapter>
# Line 163  Line 228 
228      different type of data set. By interacting with the map the user can      different type of data set. By interacting with the map the user can
229      visually explore the data.      visually explore the data.
230      </para>      </para>
231        <para>
232        The map can have a name that will appear in the Thuban title bar.
233        The map name can be changed using
234        <menuchoice>
235        <guimenu>Map</guimenu>
236        <guimenuitem>Rename</guimenuitem>
237        </menuchoice>.
238        </para>
239        <para>
240        <inlinemediaobject>
241        <imageobject>
242        <imagedata fileref="../images/3_rename_map.png" format="PNG" scale="&imgscale;"/>
243        </imageobject>
244        <imageobject>
245        <imagedata fileref="./images/3_rename_map.eps" format="EPS" scale="&imgscale;"/>
246        </imageobject>
247        <textobject> <phrase>Rename Map</phrase> </textobject>
248        </inlinemediaobject>
249        </para>
250    
251          <section><title>Adding and Removing Layers</title>          <section><title>Adding and Removing Layers</title>
252          <para>          <para>
253          There are two types of layers that can use added to a map: shape layers          There are two types of layers that can be added to a map: shape layers
254          and image layers. Shape layers are stored in Shapefile format, a          and image layers. Shape layers are stored in Shapefile format, a
255          standard file format for storing geographic objects. Normally, these          standard file format for storing geographic objects. These
256          files have the extension ``.shp''. Associated with          files have the extension ``.shp''. Associated with
257          the object information is a database file which stores attributes for          the shape file is a database file which stores attributes for
258          each shape in the Shapefile. This file, stored in DB2 format, usually          each shape in the shape file. This file, in dBase format,
259          has the extension ``.dbf''. Both files should have the same base name.          has the extension ``.dbf''. Both files must have the same base name.
260          For example, if there is a Shapefile named roads.shp there should          For example, if there is a shape file named roads.shp there must
261          also be a file roads.dbf.          also be a file roads.dbf.
262          </para>          </para>
263          <para>          <para>
# Line 183  Line 267 
267          <guimenuitem>Add Layer</guimenuitem>          <guimenuitem>Add Layer</guimenuitem>
268          </menuchoice>.          </menuchoice>.
269          Thuban will load all files with the same base name, so it doesn't          Thuban will load all files with the same base name, so it doesn't
270          matter if the Shapefile or database file is selected.          matter if the shape file or database file is selected.
271          </para>          </para>
272    
273          <para>          <para>
# Line 193  Line 277 
277          <guimenuitem>Add Image Layer</guimenuitem>          <guimenuitem>Add Image Layer</guimenuitem>
278          </menuchoice>.          </menuchoice>.
279          It is important to select a valid image file that has geographic          It is important to select a valid image file that has geographic
280          data associated with it. This can be embedded in the file itself,          data associated with it. The data can be embedded in the file itself,
281          or in another file. If geographic information cannot be found, Thuban          or in another file. If geographic information cannot be found, Thuban
282          will report an error.          will report an error.
283          </para>          </para>
# Line 202  Line 286 
286          <section><title>Navigation</title>          <section><title>Navigation</title>
287          <para>          <para>
288          The map can be explored by using the navigation tools available on          The map can be explored by using the navigation tools available on
289          the tool bar, or from the          the tool bar or from the
290          <menuchoice><guimenu>Map</guimenu></menuchoice> menu.          <menuchoice><guimenu>Map</guimenu></menuchoice> menu.
291          </para>          </para>
292            <itemizedlist>
293            <listitem>
294          <para>          <para>
295          The ZoomIn tool          The ZoomIn tool
296          <inlinemediaobject>          <inlinemediaobject>
297          <imageobject>          <imageobject>
298          <imagedata fileref="../images/3_2_zoomin.png" format="PNG"/>          <imagedata fileref="../images/3_2_zoomin.png" format="PNG" scale="&imgscale;"/>
299          </imageobject>          </imageobject>
300          <imageobject>          <imageobject>
301          <imagedata fileref="./images/3_2_zoomin.eps" format="EPS"/>          <imagedata fileref="./images/3_2_zoomin.eps" format="EPS" scale="&imgscale;"/>
302          </imageobject>          </imageobject>
303          <textobject> <phrase>ZoomIn Tool</phrase> </textobject>          <textobject> <phrase>ZoomIn Tool</phrase> </textobject>
304          </inlinemediaobject>          </inlinemediaobject>
305          can be used to enlarge a region of the map. Clicking once on the map          enlarges a region of the map. Clicking once on the map
306          will double the magnification and center the map on the point that          will double the magnification and center the map on the point that
307          was clicked. Clicking and dragging lets the user select a region          was clicked. Clicking and dragging selects a region that will be
308          to be enlarged to fit the window.          enlarged to fit the window.
309          </para>          </para>
310            </listitem>
311            <listitem>
312          <para>          <para>
313          The ZoomOut tool          The ZoomOut tool
314          <inlinemediaobject>          <inlinemediaobject>
315          <imageobject>          <imageobject>
316          <imagedata fileref="../images/3_2_zoomout.png" format="PNG"/>          <imagedata fileref="../images/3_2_zoomout.png" format="PNG" scale="&imgscale;"/>
317          </imageobject>          </imageobject>
318          <imageobject>          <imageobject>
319          <imagedata fileref="./images/3_2_zoomout.eps" format="EPS"/>          <imagedata fileref="./images/3_2_zoomout.eps" format="EPS" scale="&imgscale;"/>
320          </imageobject>          </imageobject>
321          <textobject> <phrase>ZoomOut Tool</phrase> </textobject>          <textobject> <phrase>ZoomOut Tool</phrase> </textobject>
322          </inlinemediaobject>          </inlinemediaobject>
# Line 237  Line 325 
325          selects a box such that the current contents of the window will be          selects a box such that the current contents of the window will be
326          scaled to fit into that box.          scaled to fit into that box.
327          </para>          </para>
328            </listitem>
329            <listitem>
330          <para>          <para>
331          The Pan tool          The Pan tool
332          <inlinemediaobject>          <inlinemediaobject>
333          <imageobject>          <imageobject>
334          <imagedata fileref="../images/3_2_pan.png" format="PNG"/>          <imagedata fileref="../images/3_2_pan.png" format="PNG" scale="&imgscale;"/>
335          </imageobject>          </imageobject>
336          <imageobject>          <imageobject>
337          <imagedata fileref="./images/3_2_pan.eps" format="EPS"/>          <imagedata fileref="./images/3_2_pan.eps" format="EPS" scale="&imgscale;"/>
338          </imageobject>          </imageobject>
339          <textobject> <phrase>Pan Tool</phrase> </textobject>          <textobject> <phrase>Pan Tool</phrase> </textobject>
340          </inlinemediaobject>          </inlinemediaobject>
341          allows the user to move the map around by clicking and dragging.          allows the user to move the map around by clicking and dragging.
342          </para>          </para>
343            </listitem>
344            <listitem>
345          <para>          <para>
346          The Full Extent tool          The Full Extent tool
347          <inlinemediaobject>          <inlinemediaobject>
348          <imageobject>          <imageobject>
349          <imagedata fileref="../images/3_2_fullextent.png" format="PNG"/>          <imagedata fileref="../images/3_2_fullextent.png" format="PNG" scale="&imgscale;"/>
350          </imageobject>          </imageobject>
351          <imageobject>          <imageobject>
352          <imagedata fileref="./images/3_2_fullextent.eps" format="EPS"/>          <imagedata fileref="./images/3_2_fullextent.eps" format="EPS" scale="&imgscale;"/>
353          </imageobject>          </imageobject>
354          <textobject> <phrase>Full Extent Tool</phrase> </textobject>          <textobject> <phrase>Full Extent Tool</phrase> </textobject>
355          </inlinemediaobject>          </inlinemediaobject>
356          rescales the viewable region so that the entire map is visible.          rescales the viewable region so that the entire map is visible.
357          </para>          </para>
358            </listitem>
359            <listitem>
360          <para>          <para>
361          The Full Layer Extent tool          The Full Layer Extent tool
362          <inlinemediaobject>          <inlinemediaobject>
363          <imageobject>          <imageobject>
364          <imagedata fileref="../images/3_2_fulllayerextent.png" format="PNG"/>          <imagedata fileref="../images/3_2_fulllayerextent.png" format="PNG" scale="&imgscale;"/>
365          </imageobject>          </imageobject>
366          <imageobject>          <imageobject>
367          <imagedata fileref="./images/3_2_fulllayerextent.eps" format="EPS"/>          <imagedata fileref="./images/3_2_fulllayerextent.eps" format="EPS" scale="&imgscale;"/>
368          </imageobject>          </imageobject>
369          <textobject> <phrase>Full Layer Extent Tool</phrase> </textobject>          <textobject> <phrase>Full Layer Extent Tool</phrase> </textobject>
370          </inlinemediaobject>          </inlinemediaobject>
# Line 278  Line 372 
372          layer fits within the window. If no layer is selected this button          layer fits within the window. If no layer is selected this button
373          will be disabled.          will be disabled.
374          </para>          </para>
375            </listitem>
376            <listitem>
377          <para>          <para>
378          The Full Shape Extent tool          The Full Shape Extent tool
379          <inlinemediaobject>          <inlinemediaobject>
380          <imageobject>          <imageobject>
381          <imagedata fileref="../images/3_2_fullshapeextent.png" format="PNG"/>          <imagedata fileref="../images/3_2_fullshapeextent.png" format="PNG" scale="&imgscale;"/>
382          </imageobject>          </imageobject>
383          <imageobject>          <imageobject>
384          <imagedata fileref="./images/3_2_fullshapeextent.eps" format="EPS"/>          <imagedata fileref="./images/3_2_fullshapeextent.eps" format="EPS" scale="&imgscale;"/>
385          </imageobject>          </imageobject>
386          <textobject> <phrase>Full Shape Extent Tool</phrase> </textobject>          <textobject> <phrase>Full Shape Extent Tool</phrase> </textobject>
387          </inlinemediaobject>          </inlinemediaobject>
388          rescales the viewable region so that the currently selected          rescales the viewable region so that the currently selected
389          shape fits within the window. If the shape is a point, it is          shape fits within the window. If the shape is a point, it is
390          centered and the map is zoomed all the way in. If no shape is          centered and the map is zoomed all the way in. If no shape is
391          selected this button will be disabled.          selected this button will be disabled. This feature is especially
392            helpful when identifying an object related to a selected record
393            in a tableview (see below).
394    
395          </para>          </para>
396            </listitem>
397            </itemizedlist>
398          </section>          </section>
399    
400          <section><title>Object Identification</title>          <section><title>Object Identification</title>
# Line 301  Line 402 
402          Objects on the map can be identified using the Identify tool          Objects on the map can be identified using the Identify tool
403          <inlinemediaobject>          <inlinemediaobject>
404          <imageobject>          <imageobject>
405          <imagedata fileref="../images/3_3_identify.png" format="PNG"/>          <imagedata fileref="../images/3_3_identify.png" format="PNG" scale="&imgscale;"/>
406          </imageobject>          </imageobject>
407          <imageobject>          <imageobject>
408          <imagedata fileref="./images/3_3_identify.eps" format="EPS"/>          <imagedata fileref="./images/3_3_identify.eps" format="EPS" scale="&imgscale;"/>
409          </imageobject>          </imageobject>
410          <textobject> <phrase>Identify Tool</phrase> </textobject>          <textobject> <phrase>Identify Tool</phrase> </textobject>
411          </inlinemediaobject>.          </inlinemediaobject>.
412          Clicking on an object selects that object and opens a dialog which          Clicking on an object selects that object and opens a dialog which
413          shows all the table attributes for that object. Any current selection          shows all the table attributes for that object. Any current selection
414          is lost.          is lost. Objects on the map are typically shapes and this document
415            will often refer to objects as shapes.
416          </para>          </para>
417          </section>          </section>
418    
419          <section><title>Object Labelling</title>          <section><title>Object Labeling</title>
420          <para>          <para>
421          Objects can be labelled using the Label tool          Objects can be labeled using the Label tool
422          <inlinemediaobject>          <inlinemediaobject>
423          <imageobject>          <imageobject>
424          <imagedata fileref="../images/3_3_label.png" format="PNG"/>          <imagedata fileref="../images/3_3_label.png" format="PNG" scale="&imgscale;"/>
425          </imageobject>          </imageobject>
426          <imageobject>          <imageobject>
427          <imagedata fileref="./images/3_3_label.eps" format="EPS"/>          <imagedata fileref="./images/3_3_label.eps" format="EPS" scale="&imgscale;"/>
428          </imageobject>          </imageobject>
429          <textobject> <phrase>Label Tool</phrase> </textobject>          <textobject> <phrase>Label Tool</phrase> </textobject>
430          </inlinemediaobject>.          </inlinemediaobject>.
431          Clicking on an object selects that object and opens a dialog which          Clicking on an object selects that object and opens a dialog which
432          displays the table attributes for that object. An attribute can          displays the table attributes for that object. An attribute can
433          be selected to be the label on the map. Using this tool for an          be selected to be the label on the map. The label will be placed
434          object that already has a label will remove the label.          at the center of the shape. Clicking on an object that already has
435            a label will remove the label.
436          </para>          </para>
437          </section>          </section>
438    
439          <section><title>The Legend</title>          <section><title>The Legend</title>
440            <para>
441            <inlinemediaobject>
442            <imageobject>
443            <imagedata fileref="../images/3_5_legend.png" format="PNG" scale="&imgscale;"/>
444            </imageobject>
445            <imageobject>
446            <imagedata fileref="./images/3_5_legend.eps" format="EPS" scale="&imgscale;"/>
447            </imageobject>
448            <textobject> <phrase>Legend</phrase> </textobject>
449            </inlinemediaobject>
450            </para>
451          <para>          <para>
452          The Legend provides an overview of the layers in the map. Layers          The Legend provides an overview of the layers in the map. Layers
453          that appear higher in the legend will appear ``closer'' to the user.          that appear higher in the legend will appear ``closer'' to the user.
# Line 346  Line 460 
460          <para>          <para>
461          Along the top of the legend is a toolbar which allows quick access          Along the top of the legend is a toolbar which allows quick access
462          to some of the layer manipulation options under          to some of the layer manipulation options under
463          <menuchoice> <guimenu>Map</guimenu> </menuchoice>.          <menuchoice><guimenu>Map</guimenu></menuchoice>.
464            </para>
465    
466            <itemizedlist>
467            <listitem>
468            <para>
469            The Move Layer to Top tool
470            <inlinemediaobject>
471            <imageobject>
472            <imagedata fileref="../images/3_5_totop.png" format="PNG" scale="&imgscale;"/>
473            </imageobject>
474            <imageobject>
475            <imagedata fileref="./images/3_5_totop.eps" format="EPS" scale="&imgscale;"/>
476            </imageobject>
477            <textobject> <phrase>Move Layer to Top</phrase> </textobject>
478            </inlinemediaobject> raises the selected layer to the top of the map.
479            </para>
480            </listitem>
481            <listitem>
482    
483            <para>
484            The Move Layer Up tool
485            <inlinemediaobject>
486            <imageobject>
487            <imagedata fileref="../images/3_5_moveup.png" format="PNG" scale="&imgscale;"/>
488            </imageobject>
489            <imageobject>
490            <imagedata fileref="./images/3_5_moveup.eps" format="EPS" scale="&imgscale;"/>
491            </imageobject>
492            <textobject> <phrase>Move Layer Up</phrase> </textobject>
493            </inlinemediaobject> raises the selected layer one level.
494            </para>
495            </listitem>
496            <listitem>
497    
498            <para>
499            The Move Layer Down tool
500            <inlinemediaobject>
501            <imageobject>
502            <imagedata fileref="../images/3_5_movedown.png" format="PNG" scale="&imgscale;"/>
503            </imageobject>
504            <imageobject>
505            <imagedata fileref="./images/3_5_movedown.eps" format="EPS" scale="&imgscale;"/>
506            </imageobject>
507            <textobject> <phrase>Move Layer Down</phrase> </textobject>
508            </inlinemediaobject> lowers the selected layer one level.
509            </para>
510    
511            </listitem>
512            <listitem>
513            <para>
514            The Move Layer to Bottom tool
515            <inlinemediaobject>
516            <imageobject>
517            <imagedata fileref="../images/3_5_tobottom.png" format="PNG" scale="&imgscale;"/>
518            </imageobject>
519            <imageobject>
520            <imagedata fileref="./images/3_5_tobottom.eps" format="EPS" scale="&imgscale;"/>
521            </imageobject>
522            <textobject> <phrase>Move Layer to Bottom</phrase> </textobject>
523            </inlinemediaobject> lowers the selected layer to the bottom of the map.
524            </para>
525    
526            </listitem>
527            <listitem>
528            <para>
529            The Visible tool
530            <inlinemediaobject>
531            <imageobject>
532            <imagedata fileref="../images/3_5_visible.png" format="PNG" scale="&imgscale;"/>
533            </imageobject>
534            <imageobject>
535            <imagedata fileref="./images/3_5_visible.eps" format="EPS" scale="&imgscale;"/>
536            </imageobject>
537            <textobject> <phrase>Visible</phrase> </textobject>
538            </inlinemediaobject> shows the selected layer in the map if it was
539            hidden.
540            </para>
541    
542            </listitem>
543            <listitem>
544            <para>
545            The Invisible tool
546            <inlinemediaobject>
547            <imageobject>
548            <imagedata fileref="../images/3_5_invisible.png" format="PNG" scale="&imgscale;"/>
549            </imageobject>
550            <imageobject>
551            <imagedata fileref="./images/3_5_invisible.eps" format="EPS" scale="&imgscale;"/>
552            </imageobject>
553            <textobject> <phrase>Invisible</phrase> </textobject>
554            </inlinemediaobject> hides the selected layer in the map.
555            </para>
556    
557            </listitem>
558            <listitem>
559            <para>
560            The Properties tool
561            <inlinemediaobject>
562            <imageobject>
563            <imagedata fileref="../images/3_5_props.png" format="PNG" scale="&imgscale;"/>
564            </imageobject>
565            <imageobject>
566            <imagedata fileref="./images/3_5_props.eps" format="EPS" scale="&imgscale;"/>
567            </imageobject>
568            <textobject> <phrase>Properties</phrase> </textobject>
569            </inlinemediaobject> opens the layer's properties dialog box.
570          Double-clicking on a layer or a group of a layer will open the          Double-clicking on a layer or a group of a layer will open the
571          properties dialog for that layer.          properties dialog for that layer.
572          </para>          </para>
573            </listitem>
574            </itemizedlist>
575            <para>
576            Along the bottom of the legend is the scalebar. The scalebar
577            will be available if there are any layers and the  map has a
578            projection set.
579            </para>
580            </section>
581    
582            <section><title>Exporting</title>
583            <para>
584            Under Windows, maps can be exported in Enhanced Metafile format
585            (<varname>.wmf</varname>)
586            from
587            <menuchoice>
588            <guimenu>Map</guimenu>
589            <guimenuitem>Export</guimenuitem>
590            </menuchoice> for use in reports, presentations, or further
591            modification. The current map view, legend, and, if available,
592            scalebar are exported. Under other platforms this option is not
593            available. Clicking this menu item open a file selection dialog
594            that lets the user select a location to export the map.
595            </para>
596          </section>          </section>
597    
598          <section><title>Printing</title>          <section><title>Printing</title>
# Line 359  Line 601 
601          <menuchoice>          <menuchoice>
602          <guimenu>Map</guimenu>          <guimenu>Map</guimenu>
603          <guimenuitem>Print</guimenuitem>          <guimenuitem>Print</guimenuitem>
604          </menuchoice>. A standard printing dialog will open allowing the          </menuchoice>. The current map view, legend, and, if available,
605          user to configure the printer.          scalebar are printed. A standard printing dialog will open allowing
606            the user to configure the printer. This dialog will differ depending
607            on which platform Thuban is running.
608          </para>          </para>
609          </section>          </section>
610    
611    </chapter>    </chapter>
612    
613    <chapter><title>Layer Management</title>    <chapter><title>Layer Management</title>
# Line 374  Line 619 
619          There are two types of layers supported by Thuban: shape layers and          There are two types of layers supported by Thuban: shape layers and
620          image layers. Shape layers consist of vector based shapes with          image layers. Shape layers consist of vector based shapes with
621          geo-referenced coordinates. There are three types of supported          geo-referenced coordinates. There are three types of supported
622          shapes: polygons, lines, and points. Image layers can be any image          shapes: polygons, lines (arc), and points. Image layers can be any image
623          file format supported by GDAL. The images must have geographic          file format supported by the Geo-spatial Data Abstraction Library
624          coordinate data either embedded within the file, or in a seperate          (GDAL). The images must have geographic
625            coordinate data either embedded within the file or in a separate
626          file that is in the same directory as the image file. GeoTIFF files          file that is in the same directory as the image file. GeoTIFF files
627          work very well with Thuban and were designed specifically to be image          work very well with Thuban and were designed specifically to be image
628          layers in GIS programs.          layers in GIS programs.
629          </para>          </para>
630            <para>
631            All actions in the
632            <menuchoice>
633            <guimenu>Layer</guimenu>
634            </menuchoice> menu act on the currently selected layer in the legend.
635            </para>
636          </section>          </section>
637    
638          <section><title>Properties</title>          <section><title>Properties</title>
639          <para>          <para>
640          Each shape in a shape layer can have various properties which control          To view the properties for a layer it must first be selected in the
641          how it is drawn on the map. Polygons and points can be drawn with an          legend. The menu option
642          outline color and a fill color, while lines have only a line color.          <menuchoice>
643            <guimenu>Layer</guimenu>
644            <guimenuitem>Properties</guimenuitem>
645            </menuchoice> opens a dialog that displays a layer's properties.
646            All layers have a title which can be modified in the text field
647            provided. The type of layer is also shows. If the type is a type
648            of shape (polygon, arc, point) the classification table will be
649            shown. Image layers have no other properties other than title
650            and type.
651            </para>
652            <para>
653            <figure>
654            <title>Properties Window</title>
655            <mediaobject>
656            <imageobject><imagedata fileref="../images/4_2_layer_properties.png" format="PNG" scale="&imgscale;"/></imageobject>
657            <imageobject><imagedata fileref="./images/4_2_layer_properties.eps" format="EPS" scale="&imgscale;"/></imageobject>
658            </mediaobject>
659            </figure>
660            </para>
661            <para>
662            <figure>
663            <title>Properties Window</title>
664            <mediaobject>
665            <imageobject><imagedata fileref="../images/4_2_raster_layer_properties.png" format="PNG" scale="&imgscale;"/></imageobject>
666            <imageobject><imagedata fileref="./images/4_2_raster_layer_properties.eps" format="EPS" scale="&imgscale;"/></imageobject>
667            </mediaobject>
668            </figure>
669          </para>          </para>
670          </section>          </section>
671    
# Line 396  Line 674 
674          Sometimes it is not desirable to view all layers at the same time.          Sometimes it is not desirable to view all layers at the same time.
675          Some layers may take a long time to draw and so while navigating          Some layers may take a long time to draw and so while navigating
676          around the map the user may not want to wait for the map to redraw          around the map the user may not want to wait for the map to redraw
677          each time the map is changed. Each layer can be independently          all the layers each time the map is changed. Each layer can be
678          turned on or off using the          independently turned on or off using the
679          <menuchoice>          <menuchoice>
680          <guimenu>Layer</guimenu>          <guimenu>Layer</guimenu>
681          <guimenuitem>Show</guimenuitem>          <guimenuitem>Show</guimenuitem>
# Line 410  Line 688 
688          </para>          </para>
689          </section>          </section>
690    
         <section><title>Sequence</title>  
         <para>  
         </para>  
         </section>  
   
691          <section><title>Duplication</title>          <section><title>Duplication</title>
692          <para>          <para>
693          Layers and all their properties, including classifications, can          Layers and all their properties, including classifications, can
# Line 424  Line 697 
697          <guimenuitem>Duplicate</guimenuitem>          <guimenuitem>Duplicate</guimenuitem>
698          </menuchoice>. Duplicating a layer is useful if the user wishes          </menuchoice>. Duplicating a layer is useful if the user wishes
699          to model a layer in several different ways. Even though the layers          to model a layer in several different ways. Even though the layers
700          overlap by carefully selecting the shape properties it is possible          overlap, by carefully selecting the shape properties it is possible
701          to display several pieces of information at once. For example, one          to display several pieces of information at once. For example, one
702          copy of a roads layer may be classified on a length property and          copy of a roads layer may be classified on a length property and
703          another copy may be classified on a type property. if the length          another copy may be classified on a type property. If the length
704          property was expressed with color and the type property expressed          property was expressed with color and the type property expressed
705          with line thickness then it would be possible to view both          with line thickness then it would be possible to view both
706          classifications by placing the type property copy over the          classifications by placing the type property copy over the
# Line 445  Line 718 
718      cannot be classified.      cannot be classified.
719      </para>      </para>
720      <para>      <para>
721      A classification consists of a number of groups, with each group      A classification consists of a number of groups, each group
722      having a value or range of values to match against, and symbol      having a value or range of values to match against, and symbol
723      properties which control how a shape is drawn on the map. The user      properties which control how a shape is drawn on the map. The user
724      selects which field in the table is used by the classification and      selects which field in the table is used by the classification and
# Line 458  Line 731 
731      <para>      <para>
732      A layer always has a classification. When a new layer is added to the      A layer always has a classification. When a new layer is added to the
733      map, a default classification is created with the DEFAULT group. This      map, a default classification is created with the DEFAULT group. This
734      group cannot be removed. Every shape in the layer, regardless of its      group cannot be removed but can be hidden (see below). Every shape in the
735      attributes, will match this group.      layer, regardless of its attributes, will match this group if no other
736        group matches.
737      </para>      </para>
738    
739          <section><title>Editing Classifications</title>          <section><title>Editing Classifications</title>
# Line 476  Line 750 
750          button.          button.
751          </para>          </para>
752          <para>          <para>
753            To apply the changes to the map the user can click
754            either <guibutton>Try</guibutton> or <guibutton>OK</guibutton>.
755            <guibutton>Try</guibutton> will not close the dialog box, allowing
756            the user to see how the classification changes the map.
757            <guibutton>Revert</guibutton> will undo the last classification applied
758            to the map. <guibutton>OK</guibutton> will commit the changes and
759            close the dialog. The user will be unable to undo the changes.
760            <guibutton>Close</guibutton> simply closes the dialog box. If any
761            changes have not been applied with <guibutton>Try</guibutton> the
762            changes will not be applied to the map.
763            </para>
764            <para>
765            <figure>
766            <title>Properties Window</title>
767            <mediaobject>
768            <imageobject><imagedata fileref="../images/5_classification.png" format="PNG" scale="&imgscale;"/></imageobject>
769            <imageobject><imagedata fileref="./images/5_classification.eps" format="EPS" scale="&imgscale;"/></imageobject>
770            </mediaobject>
771            </figure>
772            </para>
773            <para>
774          The order of the groups in the classification is significant          The order of the groups in the classification is significant
775          except for the DEFAULT group, which remains at the top. When shapes          except for the DEFAULT group, which remains at the top. When shapes
776          are matched against groups the matching begins at the first group          are matched against groups the matching begins at the first group
777          other than the DEFAULT group so that groups higher in the list will          after the DEFAULT group so that groups higher in the list will
778          be checked first. Matching for a          be checked first. Matching for a
779          given shape will stop at the first group that matches. The user can          given shape will stop at the first group that matches. The user can
780          use <guibutton>Move Up</guibutton> and <guibutton>Move Down</guibutton>          use <guibutton>Move Up</guibutton> and <guibutton>Move Down</guibutton>
781          to change the order of the groups. The DEFAULT group will always          to change the order of the groups. The DEFAULT group will always
782          match a shape that hasn't matched another group.          match a shape that hasn't matched another group.
783          </para>          </para>
784          <para>              <section><title>Visible</title>
785          The Value column of the classification table is the value that will              <para>
786          be matched when the map is being drawn. The type of data that can              The Visible column has check-boxes that determine whether a
787          entered into this field depends on the type of data of the              classification group will be displayed in the legend. This is
788          classification field.              useful if the user knows that the groups completely cover
789          </para>              the data set and don't want the DEFAULT group to be displayed
790          <para>              in the legend and on a printout.
791          If the field is of type Text, anything entered              </para>
792          into the field is valid. The text will be compared literally to the          </section>
793          value of the shape attribute, including case sensitivity.              <section><title>Symbols</title>
794          If the type is Integer, then any valid integer may be entered. In              <para>
795          addition, with special syntax, a range of values can be entered.              Each type of shape has its own type of symbol. Thuban supports three
796          A range from <varname>start</varname> to <varname>end</varname>              types of shapes: polygons, lines, and points. Polygons and points
797          inclusive is specifed like this: <literal>[start;end]</literal>.              have outline and fill color, while lines have only line color. Each
798          The exclusive range is specified like this:              group has associated symbol properties. To edit the symbol
799          <literal>]start;end[</literal>. Ranges can include infinity like              properties for a group the user can double click on the Symbol
800          this: <literal>[-oo;oo]</literal>. Field types can also be of type              column or select a group and click the
801          Decimal. They represent any rational number and can be used in ranges              <guibutton>Edit Symbol</guibutton> button.
802          as well.              </para>
803          </para>              </section>
804          </section>          <section><title>Value</title>
805                <para>
806          <section><title>Symbols</title>              The Value column of the classification table is the value that will
807          <para>              be matched when the map is being drawn. The type of data that can
808          Each type of shape has its own type of symbol. Thuban supports three              entered into this field depends on the type of data of the
809          types of shapes: polygons, lines, and points. Polygons and points have              classification field.
810          outline and fill color, while lines have only line color. Each group              </para>
811          has associated symbol properties. To edit the symbol properties for a              <para>
812          group the user can double click on the Symbol column or select a              If the field is of type Text, anything entered
813          group and click the <guibutton>Edit Symbol</guibutton> button.              into the field is valid. The text will be compared literally to the
814          </para>              value of the shape attribute, including case sensitivity.
815                If the type is Integer, then any valid integer may be entered. In
816                addition, with special syntax, a range of values can be entered.
817                A range from <varname>start</varname> to <varname>end</varname>
818                inclusive is specified like this: <literal>[start;end]</literal>.
819                The exclusive range is specified like this:
820                <literal>]start;end[</literal>. Ranges can include infinity like
821                this: <literal>[-oo;oo]</literal>. Field types can also be of type
822                Decimal. They represent any rational number and can be used in
823                ranges as well.
824                </para>
825                </section>
826                <section><title>Label</title>
827                <para>
828                By default, the text that is displayed for a group in the legend
829                is the value for that group. The label can substitute a more
830                descriptive term in the legend.
831                </para>
832            </section>
833          </section>          </section>
834    
835          <section><title>Generating Classes</title>          <section><title>Generating Classes</title>
836          <para>          <para>
837            <figure>
838            <title>Generate Class</title>
839            <mediaobject>
840            <imageobject><imagedata fileref="../images/5_3_genclass.png" format="PNG" scale="&imgscale;"/></imageobject>
841            <imageobject><imagedata fileref="./images/5_3_genclass.eps" format="EPS" scale="&imgscale;"/></imageobject>
842            </mediaobject>
843            </figure>
844            </para>
845            <para>
846          Creating a classification by hand can be tedious.          Creating a classification by hand can be tedious.
847          Thuban, therefore, provides a means of generating an entire          Thuban, therefore, provides a means of generating an entire
848          classification at once while still giving the user control over          classification at once while still giving the user control over
849          how it appears. Clicking <guibutton>Generate Class</guibutton>          how it appears. Clicking <guibutton>Generate Class</guibutton>
850          opens the <varname>Generate Classification</varname> dialog.          opens the <varname>Generate Classification</varname> dialog.
851          Under the <varname>Generate</varname> pulldown there are at most          Under the <varname>Generate</varname> pull down there are at most
852          three different ways to generate classifications:          three different ways to generate classifications:
853          Unique Values, Unique Distribution, and Quantiles. Some options          Unique Values, Uniform Distribution, and Quantiles. Some options
854          may not be available if they data type for the field does not          may not be available if the data type for the field does not
855          support them. For instance, <varname>Unique Distribution</varname>          support them. For instance, <varname>Uniform Distribution</varname>
856          doesn't make sense for a Text field.          doesn't make sense for a Text field.
857          </para>          </para>
858          <para>          <para>
859          For every way of generating a classification, a color scheme must          For every way of generating a classification, a color scheme must
860          be selected. Thuban provides several different color schemes that          be selected. Thuban provides several different color schemes that
861          affect how the group properties change over the classification.          affect how the group properties change over the classification.
862            It may be desirable that only certain properties change over the
863            classification. If the shape type is a polygon or a point then
864            the <guibutton>Fix Border Color</guibutton> option will be available.
865            This allows the user to select a border color for all classification
866            groups.
867          It is also possible to create a custom color scheme. Selecting          It is also possible to create a custom color scheme. Selecting
868          this option will display two symbols: the one of the left has the          this option will display two symbols: the one of the left has the
869          properties of the first group and the one on the right has the          properties of the first group and the one on the right has the
870          properties of the last group. Thuban will interpolate between these          properties of the last group. Thuban will interpolate between these
871          two properties to generate the other groups.          two properties to generate the other groups.
872            <figure>
873            <title>Custom Color Scheme</title>
874            <mediaobject>
875            <imageobject><imagedata fileref="../images/5_2_custom_ramp.png" format="PNG" scale="&imgscale;"/></imageobject>
876            <imageobject><imagedata fileref="./images/5_2_custom_ramp.eps" format="EPS" scale="&imgscale;"/></imageobject>
877            </mediaobject>
878            </figure>
879          </para>          </para>
880          <para>          <para>
881          The Unique Values option lets the user select specific values that          The Unique Values option lets the user select specific values that
# Line 551  Line 885 
885          right. Each list can be sorted or reversed for easier searching.          right. Each list can be sorted or reversed for easier searching.
886          The classification that is generated will be in the same order as          The classification that is generated will be in the same order as
887          the list on the right.          the list on the right.
888            <figure>
889            <title>Unique Values</title>
890            <mediaobject>
891            <imageobject><imagedata fileref="../images/5_2_unique_values.png" format="PNG" scale="&imgscale;"/></imageobject>
892            <imageobject><imagedata fileref="./images/5_2_unique_values.eps" format="EPS" scale="&imgscale;"/></imageobject>
893            </mediaobject>
894            </figure>
895          </para>          </para>
896          <para>          <para>
897          The Unique Distribution option creates a user specified number of          The Uniform Distribution option creates a user specified number of
898          groups of ranges such that each range covers equal intervals. The          groups of ranges such that each range covers equal intervals. The
899          minimum and maximum values can automatically be retrieved from the          minimum and maximum values can automatically be retrieved from the
900          table by clicking <guibutton>Retrieve From Table</guibutton>. The          table by clicking <guibutton>Retrieve From Table</guibutton>. The
901          stepping is how large each interval is. Adjusting this value will          stepping is how large each interval is. Adjusting this value will
902          automatically recalculate how many groups is appropriate.          automatically recalculate how many groups is appropriate.
903            <figure>
904            <title>Uniform Distribution</title>
905            <mediaobject>
906            <imageobject><imagedata fileref="../images/5_2_uniform_dist.png" format="PNG" scale="&imgscale;"/></imageobject>
907            <imageobject><imagedata fileref="./images/5_2_uniform_dist.eps" format="EPS" scale="&imgscale;"/></imageobject>
908            </mediaobject>
909            </figure>
910          </para>          </para>
911          <para>          <para>
912          The Quantiles option generates ranges based on the number items          The Quantiles option generates ranges based on the number of items
913          in the input set. For example, by specifying 5 groups Thuban will          in the table. For example, by specifying five groups Thuban will
914          generate groups with appropriate ranges such that 20% of the table          generate five groups with appropriate ranges such that 20% of the table
915          data is in each group. If it is impossible to generate exact          data is in each group. If it is impossible to generate exact
916          grouping, Thuban will issue a warning but allow the user to continue.          groupings, Thuban will issue a warning but allow the user to continue.
917            <figure>
918            <title>Quantiles</title>
919            <mediaobject>
920            <imageobject><imagedata fileref="../images/5_2_quantiles.png" format="PNG" scale="&imgscale;"/></imageobject>
921            <imageobject><imagedata fileref="./images/5_2_quantiles.eps" format="EPS" scale="&imgscale;"/></imageobject>
922            </mediaobject>
923            </figure>
924          </para>          </para>
925          </section>          </section>
926    </chapter>    </chapter>
# Line 574  Line 929 
929      <para>      <para>
930      Projections control how the geographic data is displayed on the screen.      Projections control how the geographic data is displayed on the screen.
931      If multiple layers are loaded into Thuban where the geographic data      If multiple layers are loaded into Thuban where the geographic data
932      is in a different projection system, then the user must tell Thuban      is in a different projection system, then the user must specify a
933      which projection each layer has. The user must also tell Thuban which      projection for each layer. The user must also tell Thuban which
934      projection the map is in. This can be the same as the layers or a different      projection the map is in. This can be the same as the layers or a different
935      projection in which case the layers are reprojected into that space.      projection in which case the layers are reprojected into that space.
936      The map projection can be set using      The map projection can be set using
# Line 587  Line 942 
942      <guimenu>Layer</guimenu>      <guimenu>Layer</guimenu>
943      <guimenuitem>Projection</guimenuitem>      <guimenuitem>Projection</guimenuitem>
944      </menuchoice>.      </menuchoice>.
945        <figure>
946        <title>Projection Window</title>
947        <mediaobject>
948        <imageobject><imagedata fileref="../images/6_projection.png" format="PNG" scale="&imgscale;"/></imageobject>
949        <imageobject><imagedata fileref="./images/6_projection.eps" format="EPS" scale="&imgscale;"/></imageobject>
950        </mediaobject>
951        </figure>
952      </para>      </para>
953      <para>      <para>
954      Thuban is distributed with a sample collection of projections. The      Thuban is distributed with a sample collection of projections. The
955      user can create new projections and make them available to all      user can create new projections and make them available to all
956      future Thuban sessions. They may also be exported and imported so      future Thuban sessions. They may also be exported and imported so
957      that custom projections can be distributed to others.      that custom projections can be distributed.
958      </para>      </para>
959          <section><title>Selecting a Projection</title>          <section><title>Selecting a Projection</title>
960          <para>          <para>
961          The available projections are listed on the left. If the layer          The available projections are listed on the left. If the layer
962          or map already has a projection it will be initially highlighted          or map already has a projection it will initially be highlighted
963          and will end with <varname>(current)</varname>. Selecting          and will end with <varname>(current)</varname>. Selecting
964          <varname>None</varname> will cause Thuban to use the data as          <varname>&lt;None&gt;</varname> will cause Thuban to use the data as
965          it appears in the source file and will not use a projection.          it appears in the source file and will not use a projection.
966          </para>          </para>
967      </section>      </section>
# Line 608  Line 970 
970          Whenever a projection is selected from the list its properties          Whenever a projection is selected from the list its properties
971          are displayed on the right. These properties can be changed          are displayed on the right. These properties can be changed
972          and the changes saved to the selected projection using          and the changes saved to the selected projection using
973          the <guibutton>Update</guibutton>. Only a projection that comes          <guibutton>Update</guibutton>. Only a projection that comes
974          from a file can be updated, so if the current layer's projection          from a file can be updated, so if the current layer's projection
975          is selectd, <guibutton>Update</guibutton> will be disabled.          is selected, <guibutton>Update</guibutton> will be disabled.
976          The <guibutton>Add to List</guibutton> adds the projection to the          <guibutton>Add to List</guibutton> adds the projection to the
977          list of available projections as a new entry, and thus make it          list of available projections as a new entry, and thus makes it
978          available to future Thuban sessions. Clicking <guibutton>New</guibutton>          available to future Thuban sessions. Clicking <guibutton>New</guibutton>
979          will create an entirely new, empty projection. The          will create an entirely new, empty projection. The
980          <guibutton>Remove</guibutton> button will permanantly remove a          <guibutton>Remove</guibutton> button will permanently remove a
981          projection from the list of available projections.          projection from the list of available projections.
982          </para>          </para>
983            <para>
984            To apply the selected projection to the map the user can click
985            either <guibutton>Try</guibutton> or <guibutton>OK</guibutton>.
986            <guibutton>Try</guibutton> will not close the dialog box, allowing
987            the user to see how the projeciton changes the map.
988            <guibutton>Revert</guibutton> will undo the last projection applied
989            to the map. <guibutton>OK</guibutton> will commit the changes and
990            close the dialog. The user will be unable to undo the changes.
991            <guibutton>Close</guibutton> simply closes the dialog box. If no
992            selection has been applied with <guibutton>Try</guibutton> the
993            selection will not be applied to the map.
994            </para>
995      </section>      </section>
996          <section><title>Importing/Exporting Projections</title>          <section><title>Importing/Exporting Projections</title>
997          <para>          <para>
998          The projections that appear in the list of available projections          The projections that appear in the list of available projections
999          can be exported to another file that the user chooses. By selecting          can be exported to another file that the user chooses. By selecting
1000          one or more projections and clicking <guibutton>Export</guibutton>          one or more projections and clicking <guibutton>Export</guibutton>
1001          the user will be able to select a file to store those projections.          the user will be able to select a file in which to store those
1002            projections.
1003          The file can then be distributed to other Thuban users. To import          The file can then be distributed to other Thuban users. To import
1004          a projection file the user can click <guibutton>Import</guibutton>.          a projection file the user can click <guibutton>Import</guibutton>.
1005          The imported projections are added to the list and are then available          The imported projections are added to the list and are then available
1006          to the current session and any future Thuban session.          to the current session and any future Thuban sessions.
1007          </para>          </para>
1008      </section>      </section>
1009    </chapter>    </chapter>
1010    
1011    <chapter><title>Table Management</title>    <chapter><title>Table Management</title>
1012      <para>      <para>
1013              Thuban distinguishes two different types of tables: Attribute tables      Thuban distinguishes two different types of tables: Attribute tables
1014              (which belong to a layer) and usual data tables. Both provide in      (which belong to a layer) and normal data tables. Both provide
1015          general the same functionality with the difference that actions on an          the same general functionality with the difference that actions on an
1016              attribute table might also effect the map display.      attribute table might also effect the map display.
1017      </para>      </para>
1018    
1019      <section><title>Table View</title>      <section><title>Table View</title>
1020        <para>          <para>
1021            <figure>
1022            <title>Table View</title>
1023            <mediaobject>
1024            <imageobject><imagedata fileref="../images/7_1_table_view.png" format="PNG" scale="&imgscale;"/></imageobject>
1025            <imageobject><imagedata fileref="./images/7_1_table_view.eps" format="EPS" scale="&imgscale;"/></imageobject>
1026            </mediaobject>
1027            </figure>
1028            </para>
1029            <para>
1030          Thuban provides a standard dialog to display table contents, the          Thuban provides a standard dialog to display table contents, the
1031          Table View. The view falls into five sections: The title, selections,          Table View. The view has five sections: The title, selections,
1032          the table grid, export functions and the status bar.          the table grid, export functions, and the status bar.
1033        </para>          </para>
1034        <para>          <para>
1035          The title bar identifies the table with it's name.          The title bar identifies the table with its name.
1036        </para>          </para>
1037        <para>          <para>
1038          The functions box let the user perform simple analysis on the data          The selections box let the user perform simple analysis on the data
1039          based on comparisons: First choice must be a field identifier of the          based on comparisons: The first choice must be a field identifier of
1040          table, the second choice determines the type of comparison. The third          the table, the second choice determines the type of comparison. The
1041          choice can be either a specific value (interpreted as numerical          third choice can be either a specific value (interpreted as numerical
1042          or string depending on the type of the first field) or a second field          or string depending on the type of the first field) or a second field
1043          identifier. Thus you can perform analysis like selecting all          identifier. Thus you can perform analysis like selecting all
1044          records where "population > 10000" or          records where <literal>population > 10000</literal> or
1045          "cars_per_habitants <  bike_per_habitants" (note that the field names          <literal>cars_per_inhabitant < bikes_per_inhabitant</literal>
1046          are only explanatory, the currently considered dbase files allow only          (note that the field names are only explanatory, the dBase files
1047          11 character field names).          allow only 11 character field names).
1048                  
1049          Selections can be combined, either by applying a selection only on          Selections can be combined either by applying a selection only on
1050          a previously selected set of records or by adding the results of a          a previously selected set of records or by adding the results of a
1051          selection to a previous set. The default is that a selection replaces          selection to a previous set. The default is that a selection replaces
1052          earlier results.          earlier results.
1053        </para>          </para>
1054        <para>          <para>
1055          The table grid shows the contents of the table (a record per column),          The table grid shows the contents of the table (one record per row),
1056          with highlighted selection results. Columns and rows can be resized.          with highlighted selection results. Columns and rows can be resized.
1057        </para>          </para>
1058        <para>          <para>
1059          The contents of a table can be exported into a file, either dbase          The contents of a table can be exported into a file, either dBase
1060          format (DBF) or comma seperated values (CSV). The 'Export' button          format (DBF) or comma separated values (CSV). The
1061            <guibutton>Export</guibutton> button
1062          raises a file dialog to specify a path and file name, the export type          raises a file dialog to specify a path and file name, the export type
1063          is determined by the file extension (either .dbf or .csv).          is determined by the file extension (either .dbf or .csv).
1064    
1065          The 'Export Selection' button works similar but exports only the          The <guibutton>Export Selection</guibutton> button works similarly
1066          selected records.          but exports only the selected records.
1067    
1068          The 'Close' button closes the table view. In difference to the          The <guibutton>Close</guibutton> button closes the table view window.
1069          menu item 'Close' just the dialog is closed, the table is still loaded          This is different from the menu item
1070          in Thuban.          <menuchoice>
1071        </para>          <guimenu>Table</guimenu>
1072        <para>          <guimenuitem>Close</guimenuitem>
1073            </menuchoice> which unloads the table from Thuban.
1074            </para>
1075            <para>
1076          The status bar displays some statistics about the table and optional          The status bar displays some statistics about the table and optional
1077          selection results.          selection results.
1078        </para>          </para>
1079      </section>      </section>
1080    
1081      <section><title>General Functionality (Menu Table)</title>      <section><title>General Functionality (Menu Table)</title>
1082        <para>          <para>
1083          The general functions affect all tables open in Thuban. Attribute          The general functions affect all tables open in Thuban. Attribute
1084          tables are considered as here as usual data tables (with the exception          tables are considered here as normal data tables (with the exception
1085          that they cannot be closed).          that they cannot be closed).
       </para>  
       <section><title>Open</title>  
         <para>  
           The 'Open' item raises a file dialog to let you select a  
           dbase file from the file system to be loaded into Thuban read-only.  
           On OK the selected file is loaded and a table view is opened.  
1086          </para>          </para>
1087        </section>          <section><title>Open</title>
1088                <para>
1089        <section><title>Close</title>              The
1090          <para>              <menuchoice>
1091            The 'Close' item raises a dialog listing the currently open              <guimenu>Table</guimenu>
1092            data tables (loaded via the 'Open' functionality'). You can select              <guimenuitem>Open</guimenuitem>
1093            tables which are dereferenced on confirmation. Since tables are              </menuchoice>
1094            opened read-only the contents of the tables are not affected.              item raises a file dialog to let you select a
1095                dBase file from the file system to be loaded into Thuban read-only.
1096            A still open table view is closed as well.              On <guibutton>OK</guibutton> the selected file is loaded and a
1097                table view is opened.
1098            Tables used in a join can not be closed.              </para>
1099          </para>          </section>
1100        </section>  
1101            <section><title>Close</title>
1102        <section><title>Rename</title>              <para>
1103          <para>              The
1104            Changes the table title.              <menuchoice>
1105          </para>              <guimenu>Table</guimenu>
1106        </section>              <guimenuitem>Close</guimenuitem>
1107                </menuchoice>
1108        <section><title>Show</title>              item raises a dialog listing the currently open
1109          <para>              data tables
1110            The 'Show' item raises a list of available tables (explicitly loaded,           attribute tables, results of a join). Selected tables are show in              (loaded via
1111            tables views on 'OK'.                        <menuchoice>
1112          </para>              <guimenu>Table</guimenu>
1113        </section>              <guimenuitem>Open</guimenuitem>
1114                </menuchoice>). Selected tables are dereferenced on confirmation.
1115        <section><title>Join</title>              Since tables are opened read-only the contents of the tables are
1116          <para>              not affected.
1117            The 'Join' item raises a dialog to specify the two tables to be  
1118            joined. The join results in a new table named 'Join of "left table"              Any open views of the tables are closed as well.
1119            and "right table"'.  
1120                Tables used in a join cannot be closed.
1121            The dialog let you select the two tables to be joined and the two              </para>
1122            fields the join has to be performed on. By default the new          </section>
1123            table contains only those records which are mathced by the join.  
1124            <section><title>Rename</title>
1125            If you want to preserve the records of the left table you can perform              <para>
1126            an outer join. The fields from the right table for records not              <menuchoice>
1127            matched by the join are filled with <varname>None</varname> in this              <guimenu>Table</guimenu>
1128            case.              <guimenuitem>Rename</guimenuitem>
1129          </para>              </menuchoice> changes the table title.
1130        </section>              </para>
1131            </section>
1132    
1133            <section><title>Show</title>
1134                <para>
1135                The
1136                <menuchoice>
1137                <guimenu>Table</guimenu>
1138                <guimenuitem>Show</guimenuitem>
1139                </menuchoice>
1140                item raises a list of available tables (explicitly
1141                loaded, attribute tables, results of a join). Selected tables are
1142                show in tables views on <guibutton>OK</guibutton>.
1143                </para>
1144            </section>
1145    
1146            <section><title>Join</title>
1147                <para>
1148                <figure>
1149                <title>Join Tables</title>
1150                <mediaobject>
1151                <imageobject><imagedata fileref="../images/7_2_5_join.png" format="PNG" scale="&imgscale;"/></imageobject>
1152                <imageobject><imagedata fileref="./images/7_2_5_join.eps" format="EPS" scale="&imgscale;"/></imageobject>
1153                </mediaobject>
1154                </figure>
1155                </para>
1156                <para>
1157                The
1158                <menuchoice>
1159                <guimenu>Table</guimenu>
1160                <guimenuitem>Join</guimenuitem>
1161                </menuchoice>
1162                item raises a dialog to specify the two tables to be
1163                joined. The join results in a new table named 'Join of "left table"
1164                and "right table"'.
1165    
1166                The dialog lets you select the two tables to be joined and the two
1167                fields the join has to be performed on. By default, the new
1168                table contains only those records which are matched by the join.
1169    
1170                If you want to preserve the records of the left table you can
1171                perform an outer join. The fields from the right table for records
1172                not matched by the join are filled with <varname>None</varname> in
1173                this case.
1174                </para>
1175            </section>
1176    
1177      </section>      </section>
1178      <section><title>Attribute Tables</title>      <section><title>Attribute Tables</title>
     <para>  
             To clearly separate between both types, Thuban provides functionality  
             regarding the attribute tables under the Layer menu.  
     </para>  
   
       <section><title>Show Table</title>  
         <para>  
           Opens the attribute table of the currently active layer in a table  
           view.  
   
           In addition to the functionality described above selections  
           affect also the map display: objects related to selected records  
           are highlighted.  
         </para>  
       </section>  
   
       <section><title>Join Table</title>  
1179          <para>          <para>
1180             In difference to the join described above the join results not in a              To clearly separate between both types of tables (data and
1181            attribute), Thuban provides functionality regarding the attribute
1182            tables under the <menuchoice><guimenu>Layer</guimenu></menuchoice> menu.
1183            </para>
1184    
1185            <section><title>Show Table</title>
1186                <para>
1187                <menuchoice>
1188                <guimenu>Layer</guimenu>
1189                <guimenuitem>Show Table</guimenuitem>
1190                </menuchoice>
1191                opens the attribute table of the currently active layer in a table
1192                view.
1193    
1194                In addition to the functionality described above selections
1195                affect also the map display: objects related to selected records
1196                are highlighted.
1197                </para>
1198            </section>
1199    
1200            <section><title>Join Table</title>
1201                <para>
1202                Unlike the join described above, the join does not result in a
1203              new table. The attribute table of the currently active layer is the              new table. The attribute table of the currently active layer is the
1204              left table and other tables are join to this table. Results of the              left table and other tables are joined to this table. The results of
1205              join in turn are available for classifications.              the join are available for classification.
   
             As a consequence of the above the join cannot result in less  
             records than the source attribute table. You are warned if the  
             right table does not fulfill this constraint. Use an outer join  
             in such cases.  
         </para>  
       </section>  
1206    
1207        <section><title>Unjoin Table</title>              As a consequence, the join cannot result in fewer
1208          <para>              records than the source attribute table. The user is warned if the
1209              As said above, a usual table can not be closed while still used in              right table does not fulfill this constraint. An outer join must be
1210              a join. While the join table resulting from a join of usual tables              used in such cases.
1211              can be simply closed (and therewith dereferences the source tables)              </para>
1212              this is not possible for attribute tables.          </section>
1213    
1214              Hence joins on attribute tables must be solved explicitely. This is          <section><title>Unjoin Table</title>
1215              what the 'Unjoin' item is used for: The last join for the currently              <para>
1216                As said above, a normal table cannot be closed while it is still
1217                used in a join. While the joined table resulting from a join of
1218                normal tables can be simply closed (and thereby dereferencing
1219                the source tables), this is not possible for attribute tables.
1220    
1221                Hence joins on attribute tables must be solved explicitly. This is
1222                what the
1223                <menuchoice>
1224                <guimenu>Layer</guimenu>
1225                <guimenuitem>Unjoin Table</guimenuitem>
1226                </menuchoice>
1227                item is used for: The last join for the currently
1228              active layer is solved.              active layer is solved.
1229          </para>              </para>
1230        </section>          </section>
   
1231      </section>      </section>
1232    </chapter>    </chapter>
1233    
1234    <chapter><title>Trouble Shooting</title>    <chapter><title>Trouble Shooting</title>
1235      <para>      <para>
1236        Here are a few problems that users have encountered when first using Thuban.
1237        </para>
1238        <para>
1239    
1240        <itemizedlist>
1241        <listitem>
1242        <para>After adding two or more layers nothing is drawn in the map window.
1243      </para>      </para>
1244        <para>
1245        This is probably because the layers have different projections. Projections
1246        must be set on all layers and on the map itself if the layers' projections
1247        are different.
1248        </para>
1249        </listitem>
1250    
1251        <listitem>
1252        <para>Thuban crashes on startup with the error
1253            <literal>NameError: global name 'False' is not defined</literal>.
1254        </para>
1255        <para>
1256        <varname>True</varname> and <varname>False</varname> were only introduced
1257        in Python 2.2.1. Thuban depends on at least Python 2.2.1.
1258        </para>
1259        </listitem>
1260    
1261        <listitem>
1262        <para>After compiling Thuban, Thuban crashes with an error similar to
1263            <literal>
1264            ImportError: /usr/local//lib/thuban/Thuban/../Lib/wxproj.so: undefined symbol: __gxx_personality_v0
1265            </literal>
1266        </para>
1267        <para>
1268        Thuban depends on the wxWindows library. If Thuban is compiled with an
1269        incompatible version of the compiler than wxWindows was compiled with
1270        this error may occur. Try compiling with a different version of the
1271        compiler.
1272        </para>
1273        </listitem>
1274        </itemizedlist>
1275        </para>
1276        <para>
1277        If an error occurs Thuban will display a dialog indicating the error
1278        before closing. The text should be copied and reported to the
1279        <ulink url="http://thuban.intevation.org/bugtracker.html">
1280        Intevation bugtracker
1281        </ulink>.
1282        More information about the system is available from
1283        <menuchoice><guimenu>Help</guimenu><guimenuitem>About</guimenuitem></menuchoice> box.
1284        This should also be included in the bug report.
1285        <figure>
1286        <title>Error Dialog</title>
1287        <mediaobject>
1288        <imageobject><imagedata fileref="../images/8_int_error.png" format="PNG" scale="&imgscale;"/></imageobject>
1289        <imageobject><imagedata fileref="./images/8_int_error.eps" format="EPS" scale="&imgscale;"/></imageobject>
1290        </mediaobject>
1291        </figure>
1292        </para>
1293    
1294    </chapter>    </chapter>
1295    
1296    <appendix><title>Supported Data Sources</title>    <appendix><title>Supported Data Sources</title>
# Line 806  Line 1299 
1299      <variablelist>      <variablelist>
1300      <varlistentry>      <varlistentry>
1301      <term>Shapefile</term>      <term>Shapefile</term>
1302      <listitem><para></para></listitem>      <listitem>
1303            <para>
1304            The Shapefile format has become a standard format for saving
1305            geographic vector information. It supports polygons, lines, and
1306            points.
1307            
1308            <ulink url="http://www.esri.com/library/whitepapers/pdfs/shapefile.pdf">
1309            Technical Specification.
1310            </ulink>  
1311            </para>
1312        </listitem>
1313        </varlistentry>
1314    
1315        <varlistentry>
1316        <term>dBase file</term>
1317        <listitem>
1318            <para>
1319            dBase files are used to store the attributes for each layer. This
1320            is closely associated with the Shapefile format. For detailed
1321            specifications on the correct format of a dBase file used with
1322            Thuban please see the Technical Specification for the Shapefile
1323            format above.
1324            </para>
1325        </listitem>
1326      </varlistentry>      </varlistentry>
1327    
1328      <varlistentry>      <varlistentry>
1329      <term>DB2 file</term>      <term>Raster files</term>
1330      <listitem><para></para></listitem>      <listitem>
1331            <para>
1332            Binding the GDAL library Thuban supports numerous raster file formats,
1333            see <ulink url="http://www.remotesensing.org/gdal/formats_list.html">
1334            GDAL format list</ulink> for details.</para>
1335    
1336            <para>Most commonly used is the <emphasis>TIFF/GeoTIFF</emphasis>
1337            format: Raster maps are provided as TIFF images, with an additional
1338            "world file" storing the geographic reference (usually with an
1339            extension ".tfw".
1340            </para>
1341        </listitem>
1342      </varlistentry>      </varlistentry>
1343    
1344      </variablelist>      </variablelist>
# Line 819  Line 1346 
1346    
1347    <appendix><title>Supported Projections</title>    <appendix><title>Supported Projections</title>
1348      <para>      <para>
1349        The following types of projections are directly support by
1350        Thuban. The specific values for each are provided by the user
1351        to create custom projections. Thuban comes with predefined
1352        projections which are available through the Projections dialog.
1353        </para>
1354        <itemizedlist>
1355        <listitem>
1356            <para>Geographic</para>
1357            <itemizedlist>
1358            <listitem><para><literal>Ellipsoid</literal></para></listitem>
1359            <listitem><para>
1360                    <literal>Source Data</literal>: either Degrees or Radians
1361                    </para></listitem>
1362            </itemizedlist>
1363        </listitem>
1364        <listitem>
1365            <para>Lambert Conic Conformal</para>
1366        <itemizedlist>
1367            <listitem><para><literal>Ellipsoid</literal></para></listitem>
1368            <listitem><para><literal>Latitude of 1st standard parallel</literal></para></listitem>
1369            <listitem><para><literal>Latitude of 2nd standard parallel</literal></para></listitem>
1370            <listitem><para><literal>Central Meridian</literal></para></listitem>
1371            <listitem><para><literal>Latitude of Origin</literal></para></listitem>
1372            <listitem><para><literal>False Easting</literal> (meters)</para></listitem>
1373            <listitem><para><literal>False Northing</literal> (meters)</para></listitem>
1374        </itemizedlist>
1375        </listitem>
1376        <listitem>
1377            <para>Transverse Mercator</para>
1378        <itemizedlist>
1379            <listitem><para><literal>Ellipsoid</literal></para></listitem>
1380            <listitem><para><literal>Latitude</literal>of origin</para></listitem>
1381            <listitem><para><literal>Longitude</literal>at central meridian</para></listitem>
1382            <listitem><para><literal>Scale Factor</literal>at central meridian</para></listitem>
1383            <listitem><para><literal>False Easting</literal> (meters)</para></listitem>
1384            <listitem><para><literal>False Northing</literal> (meters)</para></listitem>
1385        </itemizedlist>
1386        </listitem>
1387        <listitem>
1388            <para>Universal Transverse Mercator</para>
1389        <itemizedlist>
1390            <listitem><para><literal>Ellipsoid</literal></para></listitem>
1391            <listitem><para><literal>Zone</literal>
1392                    (can be guessed appling the Propose button)</para></listitem>
1393            <listitem><para><literal>Southern Hemisphere</literal> flag</para></listitem>
1394        </itemizedlist>
1395        </listitem>
1396        </itemizedlist>
1397        
1398        <para>
1399        Thuban comes with a sample set of map projections for various
1400        European countries. Apart from the basic projection they differ
1401        especially in their parameterization:
1402        </para>
1403        <itemizedlist>
1404        <listitem><para>Belgium Datum 1972 (Lambert Conic Conformal)</para>
1405        </listitem>
1406    
1407        <listitem><para>Gauss-Boaga Zone 1 (Italy, Transverse Mercartor)</para>
1408        </listitem>
1409    
1410        <listitem><para>Gauss-Krueger Zone 2 (Germany, Transverse Mercartor)
1411        </para>
1412        </listitem>
1413    
1414        <listitem><para>Reseau Geodesique Francaise
1415        (France, Lambert Conic Conformal)</para>
1416        </listitem>
1417    
1418        <listitem><para>UK National Grid (United Kingdom, Transverse Mercartor)
1419        </para>
1420        </listitem>
1421        </itemizedlist>
1422    
1423        <para>
1424        Thuban uses the comprehensive PROJ library for projections. PROJ provides
1425        more than the four commonly used projections described above. If needed
1426        Thuban can be easily extended to a new projection covered by PROJ.
1427      </para>      </para>
     <variablelist>  
     <varlistentry>  
     <term>Geographic</term>  
     <listitem><para>Geographic</para></listitem>  
     </varlistentry>  
     <varlistentry>  
     <term>Lambert Conic Conformal</term>  
     <listitem><para>Lambert Conic Conformal</para></listitem>  
     </varlistentry>  
     <varlistentry>  
     <term>Transverse Mercator</term>  
     <listitem><para>Transverse Mercator</para></listitem>  
     </varlistentry>  
     <varlistentry>  
     <term>Universal Transverse Mercator</term>  
     <listitem><para>Universal Transverse Mercator</para></listitem>  
     </varlistentry>  
     </variablelist>  
1428    </appendix>    </appendix>
1429    
1430  </book>  </book>
1431    
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