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revision 1744 by jan, Tue Sep 23 15:37:25 2003 UTC revision 2311 by jan, Sat Jul 31 11:12:20 2004 UTC
# Line 2  Line 2 
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">]>      [<!ENTITY imgscale "60">]>
6  <!-- $Revision$ -->  <!-- $Revision$ -->
7  <book>  <book>
8    <bookinfo>    <bookinfo>
# Line 19  Line 19 
19        </author>        </author>
20          </authorgroup>          </authorgroup>
21      <copyright>      <copyright>
22        <year>2003</year>        <year>2003, 2004</year>
23        <holder>Intevation GmbH</holder>        <holder>Intevation GmbH</holder>
24      </copyright>      </copyright>
25     <revhistory>     <revhistory>
26  <!-- comment this first revision out when releasing a real version -->  <!-- comment this first revision out when releasing a real version -->
 <!--  
27       <revision>       <revision>
28          <revnumber>CVS version $Id$</revnumber>          <revnumber>CVS version $Id$</revnumber>
29          <date></date>          <date></date>
30          <revremark>Under development.</revremark>          <revremark>Under development.</revremark>
31       </revision>       </revision>
32  -->       <revision>
33            <revnumber>1.0.0</revnumber>
34            <date>22-Jan-2004</date>
35            <revremark>
36                            Corresponds to Thuban 1.0.0.
37                            New: Installation instructions for Win32.
38                    </revremark>
39         </revision>
40         <revision>
41            <revnumber>1.0pre3</revnumber>
42            <date>04-Dec-2003</date>
43            <revremark>
44                            Corresponds to Thuban 1.0rc1.
45                            New: I18n, right button legend menu, EPSG projectons,
46                PostGIS support.
47                    </revremark>
48         </revision>
49       <revision>       <revision>
50          <revnumber>1.0pre2</revnumber>          <revnumber>1.0pre2</revnumber>
51          <date>29-Aug-2003</date>          <date>29-Aug-2003</date>
# Line 51  Line 66 
66    <chapter><title>Introduction</title>    <chapter><title>Introduction</title>
67      <para>      <para>
68      Thuban is an interactive geographic data viewer.      Thuban is an interactive geographic data viewer.
69      It has been developed because there was no simple interactive      Its development had been started because there was no simple interactive
70      viewer for geographic information available as Free Software. Thuban is      viewer for geographic information available as Free Software. Thuban is
71      written in Python and C++ and uses the wxWindows library allowing it to      written mainly in Python and uses the wxWidgets (former wxWindows)
72        library allowing it to
73      run on many different platforms, including GNU/Linux and Windows.      run on many different platforms, including GNU/Linux and Windows.
74      </para>      </para>
75      <para>      <para>
# Line 67  Line 83 
83      </para>      </para>
84      <para>      <para>
85      Thuban arranges a session in a hierarchy. A session contains a map which      Thuban arranges a session in a hierarchy. A session contains a map which
86      consists of layers. Each layer represents one kind of data set. For      consists of layers. Each layer represents a data set. For
87      instance, there may be a layer for roads and another layer for buildings.      instance, there may be a layer for roads and another layer for buildings.
88      These layers can either be vector shapes or images.      These layers can either be vector shapes or images.
89      </para>      </para>
# Line 80  Line 96 
96          <ulink url="http://thuban.intevation.org/download.html">          <ulink url="http://thuban.intevation.org/download.html">
97          Thuban Download site          Thuban Download site
98          </ulink>.          </ulink>.
99            </para>
100            <para>
101            Required:
102          <itemizedlist>          <itemizedlist>
103              <listitem><para>Python 2.2.1 (<literal>http://www.python.org</literal>)</para></listitem>              <listitem><para>Python 2.2.1
104              <listitem><para>wxWindows 2.4 (<literal>http://www.wxwindows.org</literal>)</para></listitem>                          (<literal>http://www.python.org</literal>)
105              <listitem><para>wxPython 2.4 (<literal>http://www.wxpython.org</literal>)</para></listitem>                          </para></listitem>
106              <listitem><para>proj 4.4.5 Projection Library (<literal>http://www.remotesensing.org/proj/</literal>)</para></listitem>              <listitem><para>wxWindows 2.4
107              <listitem><para>GDAL 1.1.8 (<literal>http://www.remotesensing.org/gdal/</literal>)</para></listitem>                          (<literal>http://www.wxwindows.org</literal>)
108              <listitem><para>SQLite 2.8.3 (<literal>http://www.hwaci.com/sw/sqlite/</literal>)</para></listitem>                          </para></listitem>
109              <listitem><para>PySQLite 0.4.3 (<literal>http://pysqlite.sourceforge.net</literal>)</para></listitem>              <listitem><para>wxPython 2.4
110                            (<literal>http://www.wxpython.org</literal>)
111                            </para></listitem>
112                <listitem><para>proj 4.4.5 Projection Library
113                            (<literal>http://www.remotesensing.org/proj/</literal>)
114                            </para></listitem>
115                <listitem><para>SQLite 2.8.3
116                            <literal>http://www.hwaci.com/sw/sqlite/</literal>)
117                            </para></listitem>
118                <listitem><para>PySQLite 0.4.3
119                            (<literal>http://pysqlite.sourceforge.net</literal>)
120                            </para></listitem>
121            </itemizedlist>
122            </para>
123            <para>
124            Optional:
125            <itemizedlist>
126                <listitem><para>GDAL 1.1.8
127                            (<literal>http://www.remotesensing.org/gdal/</literal>)
128                            </para></listitem>
129                <listitem><para>psycopg 1.0.8
130                            (<literal>http://initd.org/software/psycopg</literal>)
131                            </para></listitem>
132              </itemizedlist>              </itemizedlist>
133          </para>          </para>
134                  <para>                  <para>
135                  Along with the source codes, the download page also offers                  Along with the source codes, the download page also offers full
136                  full installation packages for Debian, Windows and RPM-based systems                  installation packages for Debian, Windows and RPM-based systems
137                  (Mandrake, RedHat, SuSE, etc).                  (Mandrake, RedHat, SuSE, etc).
138                  </para>                  </para>
139                  <section><title>RPM-based GNU/Linux Systems</title>                  <section><title>RPM-based GNU/Linux Systems</title>
140                          <section><title>Installing Binary Packages</title>                          <section><title>Installing Binary Packages</title>
141                                  <para>                                  <para>
142                                  The most wide-spread RPM-based GNU/Linux Systems are RedHat,                                  The most wide-spread RPM-based GNU/Linux
143                                  Mandrake and SuSE. The documentation of these distributions                                  Systems are RedHat, Mandrake and SuSE.
144                                  should contain information about how to install third-party                                  The documentation of these distributions
145                                  RPM packages. Nonetheless, a short summary is provided here.                                  should contain information about how to
146                                    install third-party RPM packages.
147                                    Nonetheless, a short summary is provided here.
148                                  </para>                                  </para>
149                                  <para>                                  <para>
150                                  RPM packages can be installed applying several tools.                                  RPM packages can be installed applying several
151                                  The most basic one is the command line program "rpm".                                  tools. The most basic one is the command line
152                                  The hardware architecture is identified in the name                                  program "rpm".  The hardware architecture is
153                                  of RPM packages, eg. 'i386' for most Intel/AMD architectures.                                  identified in the name of RPM packages, eg.
154                                  If you have a different hardware architecture, where no                                  'i386' for most Intel/AMD architectures.  
155                                  binary RPM packages are provided, you must rebuild binary                                  If you have a different hardware architecture,
156                                  packages from the RPM source packages first (see below).                                  where no binary RPM packages are provided,
157                                    you must rebuild binary packages from the
158                                    RPM source packages first (see below).
159                                  Typical rpm commands look like:                                  Typical rpm commands look like:
160    
161                                  <programlisting>                                  <programlisting>
162                                  rpm --install Thuban-0.9.0-1.i386.rpm                                  rpm --install Thuban-0.9.0-1.i386.rpm
163                                  </programlisting>                                  </programlisting>
164    
165                                  Depending on what you already have installed on your                                  Depending on what you already have installed
166                                  system, you are informed that some packages are                                  on your system, you are informed that some
167                                  required, but not installed. You need to install them                                  packages are required, but not installed.
168                                  first. Either they are provided by your GNU/Linux distributor                                  You need to install them first. Either they
169                                  or available somewhere on the Internet.                                  are provided by your GNU/Linux distributor
170                                  The more essential and special ones are provided together                                  or available somewhere on the Internet.  
171                                  with the Thuban package.                                  The more essential and special ones are
172                                    provided together with the Thuban package.
173                                  </para>                                  </para>
174    
175                                  <para>                                  <para>
# Line 238  rpm -bb thuban.spec Line 284  rpm -bb thuban.spec
284                          <ulink url="http://www.rpm.org/">homepage of RPM</ulink>.                          <ulink url="http://www.rpm.org/">homepage of RPM</ulink>.
285                                  </para>                                  </para>
286                          </section>                          </section>
287                  </section>                  </section> <!-- Intro - Installation - RPM-->
288    
289                    <section><title>Win32 Systems</title>
290                    <para>
291                            A common installation package of Thuban for Win32
292                            systems is available from the Thuban website download
293                            section. This installation package is configured for
294                            displaying file based vector data (Shapefiles). For the
295                            display of raster data or the connection to spatial
296                            databases additional steps are needed.  
297                    </para>
298                    <para>
299                            The required Python packages are listed and linked on
300                            the download page as well.  If you don't have Python
301                            installed already, download the packages for Python,
302                            wxPython for Python and the SQLite Python Libraries as
303                            well as the Thuban package. Install all four packages
304                            in the order: Python, wxPython, SQLite, Thuban. Follow
305                            the installation instructions provided by the seperate
306                            setups. The Thuban installation package will add an
307                            entry in the menu folder you configured.
308                    </para>
309                    <section><title>Raster Data: Installation of GDAL</title>
310                    <para>
311                            Enabling the raster data features of Thuban is
312                            straight forward. For the examples we assume that
313                            Thuban has been installed under
314                            <literal>C:\Thuban</literal>:
315                            <itemizedlist>
316                            <listitem>
317                            <para>
318                            Download the zip-archive <ulink
319                            url="ftp://intevation.de/thuban/win2k/gdal-win2k.zip"
320                            >gdal-win2k</ulink>.
321                            </para></listitem>
322                            <listitem><para>Extract the archive (e.g. with
323                            <ulink
324                            url="http://www.info-zip.org/pub/infozip/WiZ.html"
325                            >WiZ (InfoZip)</ulink>) into the
326                            <literal>C:\Thuban\Lib</literal>
327                            directory of your Thuban installation.
328                            </para>
329                            </listitem>
330                            <listitem>
331                            <para>
332                            Extent the <varname>PYTHONPATH</varname>
333                            environment variable (in your Windows Control Panel)
334                            to make the new libraries available for Thuban.
335                            <programlisting>
336    %PYTHONPATH%;C:\Thuban\Lib\gdal;C:\Thuban\Lib\gdal\pymod
337                            </programlisting>
338                            </para>
339                            </listitem>
340                            <listitem>
341                            <para>
342                            Extent also the <varname>PATH</varname>
343                            environment variable accordingly:
344                            <programlisting>
345    %PATH%;C:\Thuban\Lib\gdal
346                            </programlisting>
347                            </para>
348                            </listitem>
349                            </itemizedlist>
350                            After this installation steps Thuban is ready to
351                            display raster data (e.g. the
352                            <literal>island.tif</literal> from the Iceland Demo
353                            data set.
354                    </para>
355                    </section> <!-- Win32: GDAL-->
356    
357                    <section><title>Working with PostGIS: Installation of PsycoPG</title>
358                    <para>
359                            To access PostgreSQL/PostGIS spatial databases with
360                            Thuban you have to install the PsycoPG package for
361                            Windows:
362                            <itemizedlist>
363                            <listitem>
364                            <para>
365                            Download the zip-archive
366                            <ulink
367                                    url="http://stickpeople.com/projects/python/win-psycopg/win-psycopg22.zip"
368                            >win-psycopg22.zip</ulink>.
369                            </para>
370                            </listitem>
371                            <listitem>
372                            <para>
373                            Extract the zip-archive into a directory either already
374                            in your <varname>PYTHONPATH</varname> or extent your
375                            <varname>PYTHONPATH</varname> variable to the directory
376                            you have extracted the archive to.
377                            </para>
378                            </listitem>
379                            </itemizedlist>
380                            For installation and maintenance of spatial databases
381                            we refer to the  <ulink
382                            url="http://postgis.refractions.net"
383                            >PostGIS Homepage</ulink>.
384                    </para>
385                    </section> <!-- Win32: PsycoPG-->
386    
387                    </section> <!-- Intro - Installation - Win32 -->
388          </section>          </section>
389    
390            <section><title>Internationalization</title>
391            <para>
392            Thuban is implemented with internationalization support. So far Thuban
393            is translated by volunteers to the following languages (apart from its
394            main language: English):
395            <itemizedlist>
396                <listitem><para>French</para></listitem>
397                <listitem><para>German</para></listitem>
398                <listitem><para>Italian</para></listitem>
399                    <listitem><para>Portuguese (Brazilian)</para></listitem>
400                <listitem><para>Russian</para></listitem>
401                <listitem><para>Spanish</para></listitem>
402            </itemizedlist>
403            </para>
404    
405            <para>
406            To use internationalization under POSIX systems (like GNU/Linux)
407            you have to set the environment variable LC_ALL accordingly (e.g.
408            LC_ALL=fr_FR for the french language support). Please check your
409            systems documentation for details and supported settings.
410            Specifiying LC_ALL on the command line while launching thuban
411            allows appication specific language settings:
412            </para>
413            <programlisting>
414            LC_ALL=fr_FR thuban.py
415            </programlisting>
416    
417            <para>
418            MS Windows users have to specify the language to be used via the control
419            bar (which effects all applications).
420            </para>
421            </section>
422    
423          <section><title>The Main Window</title>          <section><title>The Main Window</title>
424          <para>          <para>
425          <figure>          <figure>
# Line 391  rpm -bb thuban.spec Line 570  rpm -bb thuban.spec
570    
571          <section><title>Adding and Removing Layers</title>          <section><title>Adding and Removing Layers</title>
572          <para>          <para>
573          There are two types of layers that can be added to a map: Shape layers          There are three types of layers that can be added to a map:
574            Shape layers, database layers
575          and image layers. Shape layers are stored in Shapefile format, a          and image layers. Shape layers are stored in Shapefile format, a
576          widely used file format for storing geographic objects. These          widely used file format for storing geographic objects. These
577          files have the extension ``.shp''. Associated with          files have the extension ``.shp''. Associated with
# Line 401  rpm -bb thuban.spec Line 581  rpm -bb thuban.spec
581          For example, if there is a shape file named roads.shp there must          For example, if there is a shape file named roads.shp there must
582          also be a file roads.dbf.          also be a file roads.dbf.
583          </para>          </para>
584          <para>          <itemizedlist>
585            <listitem>
586            <para>
587          Shape layers can be added to the map with          Shape layers can be added to the map with
588          <menuchoice>          <menuchoice>
589          <guimenu>Map</guimenu>          <guimenu>Map</guimenu>
# Line 417  rpm -bb thuban.spec Line 599  rpm -bb thuban.spec
599                  Use the shift-button together with the left mouse button to extend                  Use the shift-button together with the left mouse button to extend
600                  the selection.                  the selection.
601          </para>          </para>
602            </listitem>
603    
604            <listitem>
605            <para>Database layers can be added to the map with
606            <menuchoice>
607            <guimenu>Map</guimenu>
608            <guimenuitem>Add Database Layer</guimenuitem>
609            </menuchoice>.
610            A dialog with two is list is opened. The left list displays all
611            database connections currently open for the session. You can retrieve
612            a list of available layers from the selected database which is
613            displayed on the right hand. From this list one layer can be selected,
614            the dialog is closed afterwards.
615            </para>
616            <para>
617            See appendix ``Working with PostGIS'' for details.
618            </para>
619            </listitem>
620    
621            <listitem>
622          <para>          <para>
623          Image layers can be added to the map with          Image layers can be added to the map with
624          <menuchoice>          <menuchoice>
# Line 429  rpm -bb thuban.spec Line 630  rpm -bb thuban.spec
630          or in another file. If geographic information cannot be found, Thuban          or in another file. If geographic information cannot be found, Thuban
631          will report an error.          will report an error.
632          </para>          </para>
633            </listitem>
634            </itemizedlist>
635          </section>          </section>
636    
637          <section><title>Navigation</title>          <section><title>Navigation</title>
# Line 720  rpm -bb thuban.spec Line 923  rpm -bb thuban.spec
923          </para>          </para>
924          </listitem>          </listitem>
925          </itemizedlist>          </itemizedlist>
926    
927            <para>
928            The most used layer related actions are also available from a
929            popup menu. It is raised when a layer is clicked with the right mouse
930            button.
931            </para>
932            
933            <para>
934            <figure>
935            <title>Layer Popup Menu</title>
936            <mediaobject>
937            <imageobject><imagedata fileref="../images/3_5_popup_menu.png" format="PNG" scale="&imgscale;"/></imageobject>
938            <imageobject><imagedata fileref="./images/3_5_popup_menu.eps" format="EPS" scale="&imgscale;"/></imageobject>
939            </mediaobject>
940            </figure>
941            </para>
942    
943          <para>          <para>
944          Along the bottom of the legend is the scalebar. The scalebar          Along the bottom of the legend is the scalebar. The scalebar
945          will be available if there are any layers and the  map has a          will be available if there are any layers and the  map has a
# Line 764  rpm -bb thuban.spec Line 984  rpm -bb thuban.spec
984    
985          <section><title>Types of Layers</title>          <section><title>Types of Layers</title>
986          <para>          <para>
987          There are two types of layers supported by Thuban: shape layers and          There are three types of layers supported by Thuban: shape layers,
988            database layers and
989          image layers. Shape layers consist of vector based shapes with          image layers. Shape layers consist of vector based shapes with
990          geo-referenced coordinates. There are three types of supported          geo-referenced coordinates. There are three types of supported
991          shapes: polygons, lines (arc), and points. Image layers can be any image          shapes: polygons, lines (arc), and points. Database layers are similar
992            to shape layers but loaded from a database instead of the file system.
993            Image layers can be any image
994          file format supported by the Geo-spatial Data Abstraction Library          file format supported by the Geo-spatial Data Abstraction Library
995          (GDAL). The images must have geographic          (GDAL). The images must have geographic
996          coordinate data either embedded within the file or in a separate          coordinate data either embedded within the file or in a separate
# Line 1099  rpm -bb thuban.spec Line 1322  rpm -bb thuban.spec
1322      </figure>      </figure>
1323      </para>      </para>
1324      <para>      <para>
1325      Thuban is distributed with a sample collection of projections. The      Thuban is distributed with a sample collection of projections and the
1326        set of coordinate systems as used by the EPSG
1327        (European Petroleum Survey Group). This quite large set is only displayed
1328        if activated by the according checkbox. The set falls into two parts:
1329        deprecated lists all projections which are no longer part of the
1330        EPSG data base.
1331        </para>
1332        <para>
1333             The
1334      user can create new projections and make them available to all      user can create new projections and make them available to all
1335      future Thuban sessions. They may also be exported and imported so      future Thuban sessions. They may also be exported and imported so
1336      that custom projections can be distributed.      that custom projections can be distributed.
# Line 1603  registry.Add(Command('hello_world', _('H Line 1834  registry.Add(Command('hello_world', _('H
1834                       helptext = _('Welcome everyone on this planet')))                       helptext = _('Welcome everyone on this planet')))
1835    
1836  # find the extensions menu (create it anew if not found)  # find the extensions menu (create it anew if not found)
1837  extensions_menu = main_menu.find_menu('extensions')  extensions_menu = main_menu.FindOrInsertMenu('extensions', _('E&xtensions'))
 if extensions_menu is None:  
     extensions_menu = main_menu.InsertMenu('extensions', _('E&xtensions'))  
1838    
1839  # finally bind the new command with an entry in the extensions menu  # finally bind the new command with an entry in the extensions menu
1840  extensions_menu.InsertItem('hello_world')  extensions_menu.InsertItem('hello_world')
# Line 1777  extensions_menu.InsertItem('hello_world' Line 2006  extensions_menu.InsertItem('hello_world'
2006      </varlistentry>      </varlistentry>
2007    
2008      <varlistentry>      <varlistentry>
2009        <term>PostGIS</term>
2010        <listitem>
2011            <para>
2012            PostGIS adds support for geographic objects to the PostgreSQL
2013            object-relational database. Different layer types (as for Shapefiles)
2014            are supported. <ulink url="http://postgis.refractions.net">PostGIS
2015            Homepage</ulink>
2016            </para>
2017        </listitem>
2018        </varlistentry>
2019    
2020        <varlistentry>
2021      <term>Raster files</term>      <term>Raster files</term>
2022      <listitem>      <listitem>
2023          <para>          <para>
# Line 1795  extensions_menu.InsertItem('hello_world' Line 2036  extensions_menu.InsertItem('hello_world'
2036      </variablelist>      </variablelist>
2037    </appendix>    </appendix>
2038    
2039      <appendix><title>Working with PostGIS</title>
2040      <para>
2041      This section focusses on the use of PostGIS in the Thuban framework. For
2042      installation and maintenance of spatial databases we refer to the  
2043      <ulink url="http://postgis.refractions.net">PostGIS Homepage</ulink>.
2044      The Thuban PostGIS support requires the
2045      <ulink url="http://initd.org/software/psycopg">psycopg module</ulink>.
2046      </para>
2047    
2048      <para>
2049            Working with PostGIS Databases is seperated into two steps:
2050            <itemizedlist>
2051            <listitem><para>Opening a Database Connection</para></listitem>
2052            <listitem><para>Loading a Data Layer</para></listitem>
2053            </itemizedlist>
2054      </para>
2055            <section><title>Opening a Database Connection</title>
2056            <para>
2057                    Before a data layer can be loaded from a PostGIS database a
2058                    connection with the database has to be established.
2059                    <menuchoice>
2060                    <guimenu>Session</guimenu>
2061                    <guimenuitem>Database Connections ...</guimenuitem>
2062                    </menuchoice> opens a dialog for database connection
2063                    management. In the dialog new connections can be added
2064                    and existing ones can be removed. Removing a database
2065                    connection is not possible if the map still displays a
2066                    layer provided by this database connection.
2067            </para>
2068        <figure>
2069        <title>Database Management Dialog</title>
2070        <mediaobject>
2071        <imageobject><imagedata fileref="../images/app_postgis_db_management.png" format="PNG" scale="&imgscale;"/></imageobject>
2072        <imageobject><imagedata fileref="./images/app_postgis_db_management.eps" format="EPS" scale="&imgscale;"/></imageobject>
2073        </mediaobject>
2074        </figure>
2075    
2076            <para>
2077                    To add a new database connection to the session a dialog is
2078                    opened to specify the relevant connection data. Enter all
2079                    data relevant for your connection. If the connection fails
2080                    the dialog remains open and provides some hints on the failure.
2081            </para>
2082            <figure>
2083            <title>Add Database Dialog</title>
2084            <mediaobject>
2085            <imageobject><imagedata fileref="../images/app_postgis_db_add.png" format="PNG" scale="&imgscale;"/></imageobject>
2086            <imageobject><imagedata fileref="./images/app_postgis_db_add.eps" format="EPS" scale="&imgscale;"/></imageobject>
2087            </mediaobject>
2088            </figure>
2089            
2090            <para>
2091            It is important to note that information on database connections are
2092            also stored with the session. Passwords are NOT stored. If you load a
2093            session with database connections you are asked to enter these
2094            passwords again where required.
2095            </para>
2096    
2097            </section>
2098    
2099            <section><title>Loading a Data Layer</title>
2100            <para>
2101            Data layers as part of a map are loaded with the
2102            <menuchoice>
2103            <guimenu>Map</guimenu>
2104            <guimenuitem>Add Database Layer ...</guimenuitem>
2105            </menuchoice> menu item. A dialog is raised displaying two choice
2106            lists. In the left list all connected databases are shown.
2107            Highlighting
2108            one of these and issuing a retrieval results in a list of available
2109            layer tables from that database. After selection of a
2110            layer the dialog is closed.
2111            </para>
2112            <figure>
2113            <title>Add Database Dialog</title>
2114            <mediaobject>
2115            <imageobject><imagedata fileref="../images/app_postgis_add_layer.png" format="PNG" scale="&imgscale;"/></imageobject>
2116            <imageobject><imagedata fileref="./images/app_postgis_add_layer.eps" format="EPS" scale="&imgscale;"/></imageobject>
2117            </mediaobject>
2118            </figure>
2119            
2120            </section>
2121    
2122      </appendix>
2123    
2124    <appendix><title>Supported Projections</title>    <appendix><title>Supported Projections</title>
2125      <para>      <para>
2126      The following types of projections are directly support by      The following types of projections are directly support by
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