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revision 1496 by frank, Tue Jul 29 12:07:13 2003 UTC revision 1570 by jan, Fri Aug 8 17:09:02 2003 UTC
# Line 6  Line 6 
6  <!-- $Revision$ -->  <!-- $Revision$ -->
7  <book>  <book>
8    <bookinfo>    <bookinfo>
9      <title>Thuban Manual</title>      <title>User's Manual for Thuban 1.0</title>
10      <author>          <authorgroup>
11        <firstname>Jonathan</firstname><surname>Coles</surname>        <author>
12      </author>          <firstname>Jonathan</firstname><surname>Coles</surname>
13      <author>        </author>
14        <firstname>Jan-Oliver</firstname><surname>Wagner</surname>        <author>
15      </author>          <firstname>Jan-Oliver</firstname><surname>Wagner</surname>
16      <author>        </author>
17        <firstname>Frank</firstname><surname>Koormann</surname>        <author>
18      </author>          <firstname>Frank</firstname><surname>Koormann</surname>
19          </author>
20            </authorgroup>
21      <copyright>      <copyright>
22        <year>2003</year>        <year>2003</year>
23        <holder>Intevation GmbH</holder>        <holder>Intevation GmbH</holder>
24      </copyright>      </copyright>
25       <revhistory>
26         <revision>
27            <revnumber>1.0pre1</revnumber>
28            <date>08-Aug-2003</date>
29            <revremark>Corresponds to Thuban development release 0.8.1</revremark>
30         </revision>
31      </revhistory>
32    
33    </bookinfo>    </bookinfo>
34    
35    <chapter><title>Introduction</title>    <chapter><title>Introduction</title>
36      <para>      <para>
37      Thuban is a Free Software Geographic Information Systems (GIS) viewer.      Thuban is an interactive geographic data viewer.
38      It is being developed because there is currently no simple interactive      It has been developed because there was no simple interactive
39      viewer for geographic information available as Free Software. Thuban is      viewer for geographic information available as Free Software. Thuban is
40      written in Python and C++ and uses the wxWindows library allowing it to      written in Python and C++ and uses the wxWindows library allowing it to
41      run on many different platforms, including GNU/Linux and Windows.      run on many different platforms, including GNU/Linux and Windows.
42      </para>      </para>
43      <para>      <para>
44      GIS viewers are a necessary tool as they allow one to get a visual      Geographic data viewers are a necessary tool as they allow one to
45            get a visual
46      impression of the positional relationship of the information that may not      impression of the positional relationship of the information that may not
47      be apparent from simple inspection of the data values themselves.      be apparent from simple inspection of the data values themselves.
48      Thuban allows the user to create a session that displays      Thuban allows the user to create a session that displays
# Line 48  Line 59 
59          <section><title>Installation</title>          <section><title>Installation</title>
60          <para>          <para>
61          Thuban is actively supported under Debian Testing (sarge), RedHat 7.2,          Thuban is actively supported under Debian Testing (sarge), RedHat 7.2,
62          and Windows 2000. All the necessary files can be found on the          and Windows 2000. Thuban depends on the following packages. These
63            packages can also be found on the
64          <ulink url="http://thuban.intevation.org/download.html">          <ulink url="http://thuban.intevation.org/download.html">
65          Thuban Download site          Thuban Download site
66          </ulink>.          </ulink>.
67          </para>          <itemizedlist>
68                <listitem><para>Python 2.2.1 (<literal>http://www.python.org</literal>)</para></listitem>
69                <listitem><para>wxWindows 2.4 (<literal>http://www.wxwindows.org</literal>)</para></listitem>
70                <listitem><para>wxPython 2.4 (<literal>http://www.wxpython.org</literal>)</para></listitem>
71                <listitem><para>proj 4.4.5 Projection Library (<literal>http://www.remotesensing.org/proj/</literal>)</para></listitem>
72                <listitem><para>GDAL 1.1.8 (<literal>http://www.remotesensing.org/gdal/</literal>)</para></listitem>
73                <listitem><para>SQLite 2.8.3 (<literal>http://www.hwaci.com/sw/sqlite/</literal>)</para></listitem>
74                <listitem><para>PySQLite 0.4.3 (<literal>http://pysqlite.sourceforge.net</literal>)</para></listitem>
75                </itemizedlist>
76            </para>
77                    <para>
78                    Along with the source codes, the download page also offers
79                    full installation packages for Debian, Windows and RPM-based systems
80                    (Mandrake, RedHat, SuSE, etc).
81                    </para>
82          </section>          </section>
83    
84          <section><title>The Main Window</title>          <section><title>The Main Window</title>
85          <para>          <para>
86          <screenshot>          <figure>
87          <screeninfo>The Main Window</screeninfo>          <title>The Main Window</title>
88          <mediaobject>          <mediaobject>
89          <imageobject> <imagedata fileref="../images/1_2_mainwindow.png" format="PNG" scale="&imgscale;"/> </imageobject>          <imageobject> <imagedata fileref="../images/1_2_mainwindow.png" format="PNG" scale="&imgscale;"/> </imageobject>
90          <imageobject> <imagedata fileref="./images/1_2_mainwindow.ps" format="EPS" scale="&imgscale;"/> </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>  
91          </mediaobject>          </mediaobject>
92          </screenshot>          </figure>
93          </para>          </para>
94    
95          <para>          <para>
# Line 159  Line 183 
183    
184          <section><title>The Session Info-Tree</title>          <section><title>The Session Info-Tree</title>
185          <para>          <para>
186          <screenshot>          <figure>
187          <screeninfo>Session Info Tree</screeninfo>          <title>Session Info Tree</title>
188          <mediaobject>          <mediaobject>
189          <imageobject><imagedata fileref="../images/2_4_session_tree.png" format="PNG" scale="&imgscale;"/></imageobject>          <imageobject><imagedata fileref="../images/2_4_session_tree.png" format="PNG" scale="&imgscale;"/></imageobject>
190          <imageobject><imagedata fileref="./images/2_4_session_tree.eps" format="EPS" scale="&imgscale;"/></imageobject>          <imageobject><imagedata fileref="./images/2_4_session_tree.eps" format="EPS" scale="&imgscale;"/></imageobject>
         <textobject><phrase>Session Info Tree</phrase></textobject>  
         <caption><para>Session Info Tree</para></caption>  
191          </mediaobject>          </mediaobject>
192          </screenshot>          </figure>
193          </para>          </para>
194          <para>          <para>
195          The session info-tree is primarily intended for developers working          The session info-tree is primarily intended for developers working
# Line 209  Line 231 
231    
232          <section><title>Adding and Removing Layers</title>          <section><title>Adding and Removing Layers</title>
233          <para>          <para>
234          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
235          and image layers. Shape layers are stored in Shapefile format, a          and image layers. Shape layers are stored in Shapefile format, a
236          standard file format for storing geographic objects. These          standard file format for storing geographic objects. These
237          files have the extension ``.shp''. Associated with          files have the extension ``.shp''. Associated with
# Line 248  Line 270 
270          the tool bar or from the          the tool bar or from the
271          <menuchoice><guimenu>Map</guimenu></menuchoice> menu.          <menuchoice><guimenu>Map</guimenu></menuchoice> menu.
272          </para>          </para>
273            <itemizedlist>
274            <listitem>
275          <para>          <para>
276          The ZoomIn tool          The ZoomIn tool
277          <inlinemediaobject>          <inlinemediaobject>
# Line 261  Line 285 
285          </inlinemediaobject>          </inlinemediaobject>
286          enlarges a region of the map. Clicking once on the map          enlarges a region of the map. Clicking once on the map
287          will double the magnification and center the map on the point that          will double the magnification and center the map on the point that
288          was clicked. Clicking and dragging selects a region that will          was clicked. Clicking and dragging selects a region that will be
289          enlarged to fit the window.          enlarged to fit the window.
290          </para>          </para>
291            </listitem>
292            <listitem>
293          <para>          <para>
294          The ZoomOut tool          The ZoomOut tool
295          <inlinemediaobject>          <inlinemediaobject>
# Line 280  Line 306 
306          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
307          scaled to fit into that box.          scaled to fit into that box.
308          </para>          </para>
309            </listitem>
310            <listitem>
311          <para>          <para>
312          The Pan tool          The Pan tool
313          <inlinemediaobject>          <inlinemediaobject>
# Line 293  Line 321 
321          </inlinemediaobject>          </inlinemediaobject>
322          allows the user to move the map around by clicking and dragging.          allows the user to move the map around by clicking and dragging.
323          </para>          </para>
324            </listitem>
325            <listitem>
326          <para>          <para>
327          The Full Extent tool          The Full Extent tool
328          <inlinemediaobject>          <inlinemediaobject>
# Line 306  Line 336 
336          </inlinemediaobject>          </inlinemediaobject>
337          rescales the viewable region so that the entire map is visible.          rescales the viewable region so that the entire map is visible.
338          </para>          </para>
339            </listitem>
340            <listitem>
341          <para>          <para>
342          The Full Layer Extent tool          The Full Layer Extent tool
343          <inlinemediaobject>          <inlinemediaobject>
# Line 321  Line 353 
353          layer fits within the window. If no layer is selected this button          layer fits within the window. If no layer is selected this button
354          will be disabled.          will be disabled.
355          </para>          </para>
356            </listitem>
357            <listitem>
358          <para>          <para>
359          The Full Shape Extent tool          The Full Shape Extent tool
360          <inlinemediaobject>          <inlinemediaobject>
# Line 335  Line 369 
369          rescales the viewable region so that the currently selected          rescales the viewable region so that the currently selected
370          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
371          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
372          selected this button will be disabled.          selected this button will be disabled. This feature is especially
373            helpful when identifying an object related to a selected record
374            in a tableview (see below).
375    
376          </para>          </para>
377            </listitem>
378            </itemizedlist>
379          </section>          </section>
380    
381          <section><title>Object Identification</title>          <section><title>Object Identification</title>
# Line 353  Line 392 
392          </inlinemediaobject>.          </inlinemediaobject>.
393          Clicking on an object selects that object and opens a dialog which          Clicking on an object selects that object and opens a dialog which
394          shows all the table attributes for that object. Any current selection          shows all the table attributes for that object. Any current selection
395          is lost.          is lost. Objects on the map are typically shapes and this document
396            will often refer to objects as shapes.
397          </para>          </para>
398          </section>          </section>
399    
# Line 404  Line 444 
444          <menuchoice><guimenu>Map</guimenu></menuchoice>.          <menuchoice><guimenu>Map</guimenu></menuchoice>.
445          </para>          </para>
446    
447            <itemizedlist>
448            <listitem>
449          <para>          <para>
450          The Move Layer to Top tool          The Move Layer to Top tool
451          <inlinemediaobject>          <inlinemediaobject>
# Line 416  Line 458 
458          <textobject> <phrase>Move Layer to Top</phrase> </textobject>          <textobject> <phrase>Move Layer to Top</phrase> </textobject>
459          </inlinemediaobject> raises the selected layer to the top of the map.          </inlinemediaobject> raises the selected layer to the top of the map.
460          </para>          </para>
461            </listitem>
462            <listitem>
463    
464          <para>          <para>
465          The Move Layer Up tool          The Move Layer Up tool
# Line 429  Line 473 
473          <textobject> <phrase>Move Layer Up</phrase> </textobject>          <textobject> <phrase>Move Layer Up</phrase> </textobject>
474          </inlinemediaobject> raises the selected layer one level.          </inlinemediaobject> raises the selected layer one level.
475          </para>          </para>
476            </listitem>
477            <listitem>
478    
479          <para>          <para>
480          The Move Layer Down tool          The Move Layer Down tool
# Line 443  Line 489 
489          </inlinemediaobject> lowers the selected layer one level.          </inlinemediaobject> lowers the selected layer one level.
490          </para>          </para>
491    
492            </listitem>
493            <listitem>
494          <para>          <para>
495          The Move Layer to Bottom tool          The Move Layer to Bottom tool
496          <inlinemediaobject>          <inlinemediaobject>
# Line 456  Line 504 
504          </inlinemediaobject> lowers the selected layer to the bottom of the map.          </inlinemediaobject> lowers the selected layer to the bottom of the map.
505          </para>          </para>
506    
507            </listitem>
508            <listitem>
509          <para>          <para>
510          The Visible tool          The Visible tool
511          <inlinemediaobject>          <inlinemediaobject>
# Line 470  Line 520 
520          hidden.          hidden.
521          </para>          </para>
522    
523            </listitem>
524            <listitem>
525          <para>          <para>
526          The Invisible tool          The Invisible tool
527          <inlinemediaobject>          <inlinemediaobject>
# Line 483  Line 535 
535          </inlinemediaobject> hides the selected layer in the map.          </inlinemediaobject> hides the selected layer in the map.
536          </para>          </para>
537    
538            </listitem>
539            <listitem>
540          <para>          <para>
541          The Properties tool          The Properties tool
542          <inlinemediaobject>          <inlinemediaobject>
# Line 497  Line 551 
551          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
552          properties dialog for that layer.          properties dialog for that layer.
553          </para>          </para>
554            </listitem>
555            </itemizedlist>
556            <para>
557            Along the bottom of the legend is the scalebar. The scalebar
558            will be available if there are any layers and the  map has a
559            projection set.
560            </para>
561          </section>          </section>
562    
563          <section><title>Exporting</title>          <section><title>Exporting</title>
# Line 507  Line 568 
568          <menuchoice>          <menuchoice>
569          <guimenu>Map</guimenu>          <guimenu>Map</guimenu>
570          <guimenuitem>Export</guimenuitem>          <guimenuitem>Export</guimenuitem>
571          </menuchoice>. Under other platforms this option is not available.          </menuchoice> for use in reports, presentations, or further
572          Clicking this menu item open a file selection dialog that lets the          modification. The current map view, legend, and, if available,
573          user select a location to export the map.          scalebar are exported. Under other platforms this option is not
574            available. Clicking this menu item open a file selection dialog
575            that lets the user select a location to export the map.
576          </para>          </para>
577          </section>          </section>
578    
# Line 519  Line 582 
582          <menuchoice>          <menuchoice>
583          <guimenu>Map</guimenu>          <guimenu>Map</guimenu>
584          <guimenuitem>Print</guimenuitem>          <guimenuitem>Print</guimenuitem>
585          </menuchoice>. A standard printing dialog will open allowing the          </menuchoice>. The current map view, legend, and, if available,
586          user to configure the printer. This dialog will differ depending          scalebar are printed. A standard printing dialog will open allowing
587            the user to configure the printer. This dialog will differ depending
588          on which platform Thuban is running.          on which platform Thuban is running.
589          </para>          </para>
590          </section>          </section>
# Line 536  Line 600 
600          There are two types of layers supported by Thuban: shape layers and          There are two types of layers supported by Thuban: shape layers and
601          image layers. Shape layers consist of vector based shapes with          image layers. Shape layers consist of vector based shapes with
602          geo-referenced coordinates. There are three types of supported          geo-referenced coordinates. There are three types of supported
603          shapes: polygons, lines, and points. Image layers can be any image          shapes: polygons, lines (arc), and points. Image layers can be any image
604          file format supported by the Geo-spatial Data Abstraction Library          file format supported by the Geo-spatial Data Abstraction Library
605          (GDAL). The images must have geographic          (GDAL). The images must have geographic
606          coordinate data either embedded within the file or in a separate          coordinate data either embedded within the file or in a separate
# Line 544  Line 608 
608          work very well with Thuban and were designed specifically to be image          work very well with Thuban and were designed specifically to be image
609          layers in GIS programs.          layers in GIS programs.
610          </para>          </para>
611            <para>
612            All actions in the
613            <menuchoice>
614            <guimenu>Layer</guimenu>
615            </menuchoice> menu act on the currently selected layer in the legend.
616            </para>
617          </section>          </section>
618    
619          <section><title>Properties</title>          <section><title>Properties</title>
# Line 554  Line 624 
624          <guimenu>Layer</guimenu>          <guimenu>Layer</guimenu>
625          <guimenuitem>Properties</guimenuitem>          <guimenuitem>Properties</guimenuitem>
626          </menuchoice> opens a dialog that displays a layer's properties.          </menuchoice> opens a dialog that displays a layer's properties.
627          All layers have a title and it can be modified in the text field          All layers have a title which can be modified in the text field
628          provided. The type of layer is also shows. If the type is a type          provided. The type of layer is also shows. If the type is a type
629          of shape (polygon, arc, point) the classification table will be          of shape (polygon, arc, point) the classification table will be
630          shown. Image layers have no other properties other than title          shown. Image layers have no other properties other than title
631          and type.          and type.
632          </para>          </para>
633          <para>          <para>
634          <screenshot>          <figure>
635          <screeninfo>Properties Window</screeninfo>          <title>Properties Window</title>
636          <mediaobject>          <mediaobject>
637          <imageobject><imagedata fileref="../images/4_2_layer_properties.png" format="PNG" scale="&imgscale;"/></imageobject>          <imageobject><imagedata fileref="../images/4_2_layer_properties.png" format="PNG" scale="&imgscale;"/></imageobject>
638          <imageobject><imagedata fileref="./images/4_2_layer_properties.eps" format="EPS" scale="&imgscale;"/></imageobject>          <imageobject><imagedata fileref="./images/4_2_layer_properties.eps" format="EPS" scale="&imgscale;"/></imageobject>
         <textobject><phrase>Properties Window</phrase></textobject>  
         <caption><para>The Properties Window for a Shape Layer</para></caption>  
639          </mediaobject>          </mediaobject>
640          </screenshot>          </figure>
641          </para>          </para>
642          <para>          <para>
643          <screenshot>          <figure>
644          <screeninfo>Properties Window</screeninfo>          <title>Properties Window</title>
645          <mediaobject>          <mediaobject>
646          <imageobject><imagedata fileref="../images/4_2_raster_layer_properties.png" format="PNG" scale="&imgscale;"/></imageobject>          <imageobject><imagedata fileref="../images/4_2_raster_layer_properties.png" format="PNG" scale="&imgscale;"/></imageobject>
647          <imageobject><imagedata fileref="./images/4_2_raster_layer_properties.eps" format="EPS" scale="&imgscale;"/></imageobject>          <imageobject><imagedata fileref="./images/4_2_raster_layer_properties.eps" format="EPS" scale="&imgscale;"/></imageobject>
         <textobject><phrase>Properties Window</phrase></textobject>  
         <caption><para>The Properties Window for an Image Layer</para></caption>  
648          </mediaobject>          </mediaobject>
649          </screenshot>          </figure>
650          </para>          </para>
651          </section>          </section>
652    
# Line 646  Line 712 
712      <para>      <para>
713      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
714      map, a default classification is created with the DEFAULT group. This      map, a default classification is created with the DEFAULT group. This
715      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
716      attributes, will match this group if no other group matches.      layer, regardless of its attributes, will match this group if no other
717        group matches.
718      </para>      </para>
719    
720          <section><title>Editing Classifications</title>          <section><title>Editing Classifications</title>
# Line 664  Line 731 
731          button.          button.
732          </para>          </para>
733          <para>          <para>
734          <screenshot>          To apply the changes to the map the user can click
735          <screeninfo>Properties Window</screeninfo>          either <guibutton>Try</guibutton> or <guibutton>OK</guibutton>.
736            <guibutton>Try</guibutton> will not close the dialog box, allowing
737            the user to see how the classification changes the map.
738            <guibutton>Revert</guibutton> will undo the last classification applied
739            to the map. <guibutton>OK</guibutton> will commit the changes and
740            close the dialog. The user will be unable to undo the changes.
741            <guibutton>Close</guibutton> simply closes the dialog box. If any
742            changes have not been applied with <guibutton>Try</guibutton> the
743            changes will not be applied to the map.
744            </para>
745            <para>
746            <figure>
747            <title>Properties Window</title>
748          <mediaobject>          <mediaobject>
749          <imageobject><imagedata fileref="../images/5_classification.png" format="PNG" scale="&imgscale;"/></imageobject>          <imageobject><imagedata fileref="../images/5_classification.png" format="PNG" scale="&imgscale;"/></imageobject>
750          <imageobject><imagedata fileref="./images/5_classification.eps" format="EPS" scale="&imgscale;"/></imageobject>          <imageobject><imagedata fileref="./images/5_classification.eps" format="EPS" scale="&imgscale;"/></imageobject>
         <textobject><phrase>Properties Window</phrase></textobject>  
         <caption><para>The Properties Window with Classifications</para></caption>  
751          </mediaobject>          </mediaobject>
752          </screenshot>          </figure>
753          </para>          </para>
754          <para>          <para>
755          The order of the groups in the classification is significant          The order of the groups in the classification is significant
# Line 738  Line 815 
815    
816          <section><title>Generating Classes</title>          <section><title>Generating Classes</title>
817          <para>          <para>
818          <screenshot>          <figure>
819          <screeninfo>Generate Class</screeninfo>          <title>Generate Class</title>
820          <mediaobject>          <mediaobject>
821          <imageobject><imagedata fileref="../images/5_3_genclass.png" format="PNG" scale="&imgscale;"/></imageobject>          <imageobject><imagedata fileref="../images/5_3_genclass.png" format="PNG" scale="&imgscale;"/></imageobject>
822          <imageobject><imagedata fileref="./images/5_3_genclass.eps" format="EPS" scale="&imgscale;"/></imageobject>          <imageobject><imagedata fileref="./images/5_3_genclass.eps" format="EPS" scale="&imgscale;"/></imageobject>
         <textobject><phrase>Generate Class</phrase></textobject>  
         <caption><para>The Generate Classifications Dialog</para></caption>  
823          </mediaobject>          </mediaobject>
824          </screenshot>          </figure>
825          </para>          </para>
826          <para>          <para>
827          Creating a classification by hand can be tedious.          Creating a classification by hand can be tedious.
# Line 756  Line 831 
831          opens the <varname>Generate Classification</varname> dialog.          opens the <varname>Generate Classification</varname> dialog.
832          Under the <varname>Generate</varname> pull down there are at most          Under the <varname>Generate</varname> pull down there are at most
833          three different ways to generate classifications:          three different ways to generate classifications:
834          Unique Values, Unique Distribution, and Quantiles. Some options          Unique Values, Uniform Distribution, and Quantiles. Some options
835          may not be available if the data type for the field does not          may not be available if the data type for the field does not
836          support them. For instance, <varname>Unique Distribution</varname>          support them. For instance, <varname>Uniform Distribution</varname>
837          doesn't make sense for a Text field.          doesn't make sense for a Text field.
838          </para>          </para>
839          <para>          <para>
840          For every way of generating a classification, a color scheme must          For every way of generating a classification, a color scheme must
841          be selected. Thuban provides several different color schemes that          be selected. Thuban provides several different color schemes that
842          affect how the group properties change over the classification.          affect how the group properties change over the classification.
843            It may be desirable that only certain properties change over the
844            classification. If the shape type is a polygon or a point then
845            the <guibutton>Fix Border Color</guibutton> option will be available.
846            This allows the user to select a border color for all classification
847            groups.
848          It is also possible to create a custom color scheme. Selecting          It is also possible to create a custom color scheme. Selecting
849          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
850          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
851          properties of the last group. Thuban will interpolate between these          properties of the last group. Thuban will interpolate between these
852          two properties to generate the other groups.          two properties to generate the other groups.
853            <figure>
854            <title>Custom Color Scheme</title>
855            <mediaobject>
856            <imageobject><imagedata fileref="../images/5_2_custom_ramp.png" format="PNG" scale="&imgscale;"/></imageobject>
857            <imageobject><imagedata fileref="./images/5_2_custom_ramp.eps" format="EPS" scale="&imgscale;"/></imageobject>
858            </mediaobject>
859            </figure>
860          </para>          </para>
861          <para>          <para>
862          The Unique Values option lets the user select specific values that          The Unique Values option lets the user select specific values that
# Line 779  Line 866 
866          right. Each list can be sorted or reversed for easier searching.          right. Each list can be sorted or reversed for easier searching.
867          The classification that is generated will be in the same order as          The classification that is generated will be in the same order as
868          the list on the right.          the list on the right.
869            <figure>
870            <title>Unique Values</title>
871            <mediaobject>
872            <imageobject><imagedata fileref="../images/5_2_unique_values.png" format="PNG" scale="&imgscale;"/></imageobject>
873            <imageobject><imagedata fileref="./images/5_2_unique_values.eps" format="EPS" scale="&imgscale;"/></imageobject>
874            </mediaobject>
875            </figure>
876          </para>          </para>
877          <para>          <para>
878          The Unique Distribution option creates a user specified number of          The Uniform Distribution option creates a user specified number of
879          groups of ranges such that each range covers equal intervals. The          groups of ranges such that each range covers equal intervals. The
880          minimum and maximum values can automatically be retrieved from the          minimum and maximum values can automatically be retrieved from the
881          table by clicking <guibutton>Retrieve From Table</guibutton>. The          table by clicking <guibutton>Retrieve From Table</guibutton>. The
882          stepping is how large each interval is. Adjusting this value will          stepping is how large each interval is. Adjusting this value will
883          automatically recalculate how many groups is appropriate.          automatically recalculate how many groups is appropriate.
884            <figure>
885            <title>Uniform Distribution</title>
886            <mediaobject>
887            <imageobject><imagedata fileref="../images/5_2_uniform_dist.png" format="PNG" scale="&imgscale;"/></imageobject>
888            <imageobject><imagedata fileref="./images/5_2_uniform_dist.eps" format="EPS" scale="&imgscale;"/></imageobject>
889            </mediaobject>
890            </figure>
891          </para>          </para>
892          <para>          <para>
893          The Quantiles option generates ranges based on the number of items          The Quantiles option generates ranges based on the number of items
894          in the input set. For example, by specifying five groups Thuban will          in the table. For example, by specifying five groups Thuban will
895          generate five groups with appropriate ranges such that 20% of the table          generate five groups with appropriate ranges such that 20% of the table
896          data is in each group. If it is impossible to generate exact          data is in each group. If it is impossible to generate exact
897          groupings, Thuban will issue a warning but allow the user to continue.          groupings, Thuban will issue a warning but allow the user to continue.
898            <figure>
899            <title>Quantiles</title>
900            <mediaobject>
901            <imageobject><imagedata fileref="../images/5_2_quantiles.png" format="PNG" scale="&imgscale;"/></imageobject>
902            <imageobject><imagedata fileref="./images/5_2_quantiles.eps" format="EPS" scale="&imgscale;"/></imageobject>
903            </mediaobject>
904            </figure>
905          </para>          </para>
906          </section>          </section>
907    </chapter>    </chapter>
# Line 815  Line 923 
923      <guimenu>Layer</guimenu>      <guimenu>Layer</guimenu>
924      <guimenuitem>Projection</guimenuitem>      <guimenuitem>Projection</guimenuitem>
925      </menuchoice>.      </menuchoice>.
926      <screenshot>      <figure>
927      <screeninfo>Projection Window</screeninfo>      <title>Projection Window</title>
928      <mediaobject>      <mediaobject>
929      <imageobject><imagedata fileref="../images/6_projection.png" format="PNG" scale="&imgscale;"/></imageobject>      <imageobject><imagedata fileref="../images/6_projection.png" format="PNG" scale="&imgscale;"/></imageobject>
930      <imageobject><imagedata fileref="./images/6_projection.eps" format="EPS" scale="&imgscale;"/></imageobject>      <imageobject><imagedata fileref="./images/6_projection.eps" format="EPS" scale="&imgscale;"/></imageobject>
     <textobject><phrase>Projection Window</phrase></textobject>  
     <caption><para>The Projection Window</para></caption>  
931      </mediaobject>      </mediaobject>
932      </screenshot>      </figure>
933      </para>      </para>
934      <para>      <para>
935      Thuban is distributed with a sample collection of projections. The      Thuban is distributed with a sample collection of projections. The
# Line 855  Line 961 
961          <guibutton>Remove</guibutton> button will permanently remove a          <guibutton>Remove</guibutton> button will permanently remove a
962          projection from the list of available projections.          projection from the list of available projections.
963          </para>          </para>
964            <para>
965            To apply the selected projection to the map the user can click
966            either <guibutton>Try</guibutton> or <guibutton>OK</guibutton>.
967            <guibutton>Try</guibutton> will not close the dialog box, allowing
968            the user to see how the projeciton changes the map.
969            <guibutton>Revert</guibutton> will undo the last projection applied
970            to the map. <guibutton>OK</guibutton> will commit the changes and
971            close the dialog. The user will be unable to undo the changes.
972            <guibutton>Close</guibutton> simply closes the dialog box. If no
973            selection has been applied with <guibutton>Try</guibutton> the
974            selection will not be applied to the map.
975            </para>
976      </section>      </section>
977          <section><title>Importing/Exporting Projections</title>          <section><title>Importing/Exporting Projections</title>
978          <para>          <para>
# Line 881  Line 999 
999    
1000      <section><title>Table View</title>      <section><title>Table View</title>
1001          <para>          <para>
1002          <screenshot>          <figure>
1003          <screeninfo>Table View</screeninfo>          <title>Table View</title>
1004          <mediaobject>          <mediaobject>
1005          <imageobject><imagedata fileref="../images/7_1_table_view.png" format="PNG" scale="&imgscale;"/></imageobject>          <imageobject><imagedata fileref="../images/7_1_table_view.png" format="PNG" scale="&imgscale;"/></imageobject>
1006          <imageobject><imagedata fileref="./images/7_1_table_view.eps" format="EPS" scale="&imgscale;"/></imageobject>          <imageobject><imagedata fileref="./images/7_1_table_view.eps" format="EPS" scale="&imgscale;"/></imageobject>
         <textobject><phrase>Table View</phrase></textobject>  
         <caption><para>The Table View</para></caption>  
1007          </mediaobject>          </mediaobject>
1008          </screenshot>          </figure>
1009          </para>          </para>
1010          <para>          <para>
1011          Thuban provides a standard dialog to display table contents, the          Thuban provides a standard dialog to display table contents, the
1012          Table View. The view falls has five sections: The title, selections,          Table View. The view has five sections: The title, selections,
1013          the table grid, export functions, and the status bar.          the table grid, export functions, and the status bar.
1014          </para>          </para>
1015          <para>          <para>
# Line 906  Line 1022 
1022          third choice can be either a specific value (interpreted as numerical          third choice can be either a specific value (interpreted as numerical
1023          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
1024          identifier. Thus you can perform analysis like selecting all          identifier. Thus you can perform analysis like selecting all
1025          records where "population > 10000" or          records where <literal>population > 10000</literal> or
1026          "cars_per_inhabitant <  bikes_per_inhabitant" (note that the field names          <literal>cars_per_inhabitant < bikes_per_inhabitant</literal>
1027          are only explanatory, the dBase files allow only          (note that the field names are only explanatory, the dBase files
1028          11 character field names).          allow only 11 character field names).
1029                
1030          Selections can be combined either by applying a selection only on          Selections can be combined either by applying a selection only on
1031          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
# Line 917  Line 1033 
1033          earlier results.          earlier results.
1034          </para>          </para>
1035          <para>          <para>
1036          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),
1037          with highlighted selection results. Columns and rows can be resized.          with highlighted selection results. Columns and rows can be resized.
1038          </para>          </para>
1039          <para>          <para>
# Line 1010  Line 1126 
1126    
1127          <section><title>Join</title>          <section><title>Join</title>
1128              <para>              <para>
1129              <screenshot>              <figure>
1130              <screeninfo>Join Tables</screeninfo>              <title>Join Tables</title>
1131              <mediaobject>              <mediaobject>
1132              <imageobject><imagedata fileref="../images/7_2_5_join.png" format="PNG" scale="&imgscale;"/></imageobject>              <imageobject><imagedata fileref="../images/7_2_5_join.png" format="PNG" scale="&imgscale;"/></imageobject>
1133              <imageobject><imagedata fileref="./images/7_2_5_join.eps" format="EPS" scale="&imgscale;"/></imageobject>              <imageobject><imagedata fileref="./images/7_2_5_join.eps" format="EPS" scale="&imgscale;"/></imageobject>
             <textobject><phrase>Join Tables</phrase></textobject>  
             <caption><para>The Join Tables Dialog</para></caption>  
1134              </mediaobject>              </mediaobject>
1135              </screenshot>              </figure>
1136              </para>              </para>
1137              <para>              <para>
1138              The              The
# Line 1044  Line 1158 
1158      </section>      </section>
1159      <section><title>Attribute Tables</title>      <section><title>Attribute Tables</title>
1160          <para>          <para>
1161              To clearly separate between both types, Thuban provides              To clearly separate between both types of tables (data and
1162          functionality regarding the attribute tables under the Layer menu.          attribute), Thuban provides functionality regarding the attribute
1163            tables under the <menuchoice><guimenu>Layer</guimenu></menuchoice> menu.
1164          </para>          </para>
1165    
1166          <section><title>Show Table</title>          <section><title>Show Table</title>
# Line 1099  Line 1214 
1214    
1215    <chapter><title>Trouble Shooting</title>    <chapter><title>Trouble Shooting</title>
1216      <para>      <para>
1217        Here are a few problems that users have encountered when first using Thuban.
1218      </para>      </para>
1219      <variablelist>      <para>
1220    
1221      <varlistentry>      <itemizedlist>
     <term>After adding two or more layers nothing is being drawn in the  
     map window.  
     </term>  
1222      <listitem>      <listitem>
1223        <para>After adding two or more layers nothing is drawn in the map window.
1224        </para>
1225      <para>      <para>
1226      This is probably because the layers have different projections. Projections      This is probably because the layers have different projections. Projections
1227      must be set on all layers and on the map itself if the layer's projections      must be set on all layers and on the map itself if the layers' projections
1228      are different.      are different.
1229      </para>      </para>
1230      </listitem>      </listitem>
     </varlistentry>  
1231    
     <varlistentry>  
     <term>Thuban crashes on startup with the error  
         <literal>NameError: global name 'False' is not defined</literal>.  
     </term>  
1232      <listitem>      <listitem>
1233        <para>Thuban crashes on startup with the error
1234            <literal>NameError: global name 'False' is not defined</literal>.
1235        </para>
1236      <para>      <para>
1237      <varname>True</varname> and <varname>False</varname> were only introduced      <varname>True</varname> and <varname>False</varname> were only introduced
1238      in Python 2.2.1. Thuban depends on at least Python 2.2.1.      in Python 2.2.1. Thuban depends on at least Python 2.2.1.
1239      </para>      </para>
1240      </listitem>      </listitem>
     </varlistentry>  
1241    
1242      <varlistentry>      <listitem>
1243      <term>After compiling Thuban, Thuban crashes with an error similar to      <para>After compiling Thuban, Thuban crashes with an error similar to
1244          <literal>          <literal>
1245          ImportError: /usr/local//lib/thuban/Thuban/../Lib/wxproj.so: undefined symbol: __gxx_personality_v0          ImportError: /usr/local//lib/thuban/Thuban/../Lib/wxproj.so: undefined symbol: __gxx_personality_v0
1246          </literal>          </literal>
1247      </term>      </para>
     <listitem>  
1248      <para>      <para>
1249      Thuban depends on the wxWindows library. If Thuban is compiled with an      Thuban depends on the wxWindows library. If Thuban is compiled with an
1250      incompatible version of the compiler than wxWindows was compiled with      incompatible version of the compiler than wxWindows was compiled with
# Line 1141  Line 1252 
1252      compiler.      compiler.
1253      </para>      </para>
1254      </listitem>      </listitem>
1255      </varlistentry>      </itemizedlist>
1256      </variablelist>      </para>
1257        <para>
1258        If an error occurs Thuban will display a dialog indicating the error
1259        before closing. The text should be copied and reported to the
1260        <ulink url="http://thuban.intevation.org/bugtracker.html">
1261        Intevation bugtracker
1262        </ulink>.
1263        More information about the system is available from
1264        <menuchoice><guimenu>Help</guimenu><guimenuitem>About</guimenuitem></menuchoice> box.
1265        This should also be included in the bug report.
1266        <figure>
1267        <title>Error Dialog</title>
1268        <mediaobject>
1269        <imageobject><imagedata fileref="../images/8_int_error.png" format="PNG" scale="&imgscale;"/></imageobject>
1270        <imageobject><imagedata fileref="./images/8_int_error.eps" format="EPS" scale="&imgscale;"/></imageobject>
1271        </mediaobject>
1272        </figure>
1273        </para>
1274    
1275    </chapter>    </chapter>
1276    
# Line 1178  Line 1306 
1306      </listitem>      </listitem>
1307      </varlistentry>      </varlistentry>
1308    
1309        <varlistentry>
1310        <term>Raster files</term>
1311        <listitem>
1312            <para>
1313            Binding the GDAL library Thuban supports numerous raster file formats,
1314            see <ulink url="http://www.remotesensing.org/gdal/formats_list.html">
1315            GDAL format list</ulink> for details.</para>
1316    
1317            <para>Most commonly used is the <emphasis>TIFF/GeoTIFF</emphasis>
1318            format: Raster maps are provided as TIFF images, with an additional
1319            "world file" storing the geographic reference (usually with an
1320            extension ".tfw").
1321            </para>
1322        </listitem>
1323        </varlistentry>
1324    
1325      </variablelist>      </variablelist>
1326    </appendix>    </appendix>
1327    
# Line 1186  Line 1330 
1330      The following types of projections are directly support by      The following types of projections are directly support by
1331      Thuban. The specific values for each are provided by the user      Thuban. The specific values for each are provided by the user
1332      to create custom projections. Thuban comes with predefined      to create custom projections. Thuban comes with predefined
1333      projections and are available through the Projections dialog.      projections which are available through the Projections dialog.
1334        </para>
1335        <itemizedlist>
1336        <listitem>
1337            <para>Geographic</para>
1338            <itemizedlist>
1339            <listitem><para><literal>Ellipsoid</literal></para></listitem>
1340            <listitem><para>
1341                    <literal>Source Data</literal>: either Degrees or Radians
1342                    </para></listitem>
1343            </itemizedlist>
1344        </listitem>
1345        <listitem>
1346            <para>Lambert Conic Conformal</para>
1347        <itemizedlist>
1348            <listitem><para><literal>Ellipsoid</literal></para></listitem>
1349            <listitem><para><literal>Latitude of 1st standard parallel</literal></para></listitem>
1350            <listitem><para><literal>Latitude of 2nd standard parallel</literal></para></listitem>
1351            <listitem><para><literal>Central Meridian</literal></para></listitem>
1352            <listitem><para><literal>Latitude of Origin</literal></para></listitem>
1353            <listitem><para><literal>False Easting</literal> (meters)</para></listitem>
1354            <listitem><para><literal>False Northing</literal> (meters)</para></listitem>
1355        </itemizedlist>
1356        </listitem>
1357        <listitem>
1358            <para>Transverse Mercator</para>
1359        <itemizedlist>
1360            <listitem><para><literal>Ellipsoid</literal></para></listitem>
1361            <listitem><para><literal>Latitude</literal>of origin</para></listitem>
1362            <listitem><para><literal>Longitude</literal>at central meridian</para></listitem>
1363            <listitem><para><literal>Scale Factor</literal>at central meridian</para></listitem>
1364            <listitem><para><literal>False Easting</literal> (meters)</para></listitem>
1365            <listitem><para><literal>False Northing</literal> (meters)</para></listitem>
1366        </itemizedlist>
1367        </listitem>
1368        <listitem>
1369            <para>Universal Transverse Mercator</para>
1370        <itemizedlist>
1371            <listitem><para><literal>Ellipsoid</literal></para></listitem>
1372            <listitem><para><literal>Zone</literal>
1373                    (can be guessed appling the Propose button)</para></listitem>
1374            <listitem><para><literal>Southern Hemisphere</literal> flag</para></listitem>
1375        </itemizedlist>
1376        </listitem>
1377        </itemizedlist>
1378        
1379        <para>
1380        Thuban comes with a sample set of map projections for various
1381        European countries. Apart from the basic projection they differ
1382        especially in their parameterization:
1383        </para>
1384        <itemizedlist>
1385        <listitem><para>Belgium Datum 1972 (Lambert Conic Conformal)</para>
1386        </listitem>
1387    
1388        <listitem><para>Gauss-Boaga Zone 1 (Italy, Transverse Mercartor)</para>
1389        </listitem>
1390    
1391        <listitem><para>Gauss-Krueger Zone 2 (Germany, Transverse Mercartor)
1392        </para>
1393        </listitem>
1394    
1395        <listitem><para>Reseau Geodesique Francaise
1396        (France, Lambert Conic Conformal)</para>
1397        </listitem>
1398    
1399        <listitem><para>UK National Grid (United Kingdom, Transverse Mercartor)
1400        </para>
1401        </listitem>
1402        </itemizedlist>
1403    
1404        <para>
1405        Thuban uses the comprehensive PROJ library for projections. PROJ provides
1406        more than the four commonly used projections described above. If needed
1407        Thuban can be easily extended to a new projection covered by PROJ.
1408      </para>      </para>
     <variablelist>  
     <varlistentry>  
     <term>Geographic</term>  
     <listitem><para></para></listitem>  
     </varlistentry>  
     <varlistentry>  
     <term>Lambert Conic Conformal</term>  
     <listitem><para></para></listitem>  
     </varlistentry>  
     <varlistentry>  
     <term>Transverse Mercator</term>  
     <listitem><para></para></listitem>  
     </varlistentry>  
     <varlistentry>  
     <term>Universal Transverse Mercator</term>  
     <listitem><para></para></listitem>  
     </varlistentry>  
     </variablelist>  
1409    </appendix>    </appendix>
1410    
1411  </book>  </book>
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