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revision 1445 by jan, Wed Jul 16 09:52:30 2003 UTC revision 1446 by jonathan, Thu Jul 17 14:59:17 2003 UTC
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20    
21    <chapter><title>Introduction</title>    <chapter><title>Introduction</title>
22      <para>      <para>
23        Thuban is a Free Software Geographic Information Systems (GIS) viewer.
24        It is being developed because there is currently no simple interactive
25        viewer for geographic information available as Free Software. Thuban is
26        written in Python and C++ and uses the wxWindows library allowing it to
27        run on many different platforms, including GNU/Linux and Windows.
28        </para>
29        <para>
30        GIS viewers are a necessary tool as they allow one to get a visual
31        impression of the positional relationship of the information that may not
32        be apparent from simple inspection of the data values themselves.
33        Thuban allows the user to create a session that displays
34        geographic data and then explore that data through navigation and
35        manipulation of how it is drawn. The results can then be saved or printed.
36        </para>
37        <para>
38        Thuban arranges a session in a hierarchy. A session contains a map which
39        consists of layers. Each layer represents one kind of data set. For
40        instance, there may be a layer for roads and another layer for buildings.
41        These layers can either be vector shapes or images.
42      </para>      </para>
43    
44          <section><title>Installation</title>          <section><title>Installation</title>
45          <para>          <para>
46          </para>          Thuban is actively supported under Debian Testing (sarge), RedHat 7.2,
47          </section>          and Windows 2000. All the necessary files can be found on the
48            <ulink url="http://thuban.intevation.org/download.html">
49          <section><title>The main window</title>          Thuban Download site
50          <para>          </ulink>.
51                  map, legend window (dockable), Statusbat, toolbar,          </para>
52                  other general stuff          </section>
53          </para>  
54            <section><title>The Main Window</title>
55            <para>
56            <screenshot>
57            <screeninfo>The Main Window</screeninfo>
58            <mediaobject>
59            <imageobject><imagedata fileref="../mainwindow.png" format="PNG"/></imageobject>
60            <textobject><phrase>The Main Window</phrase></textobject>
61            <caption><para>The Main Window</para></caption>
62            </mediaobject>
63            </screenshot>
64            </para>
65    
66            <para>
67            The map window (1) shows the current state of the map and is where
68            the user can interact with the map using the tools.
69            </para>
70    
71            <para>
72            The legend on
73            the left (2) displays a list of the current layers and any visible
74            classification groups. In the example, each shape layer has a default
75            classification which specifies how the shapes in each layer are
76            drawn. Layers that are higher in the list appear ``closer'' to the
77            user. The legend can be closed by clicking on the small X in the
78            upper right-hand region of the legend. To open it again, use
79            <menuchoice>
80            <guimenu>Map</guimenu>
81            <guimenuitem>Legend</guimenuitem>
82            </menuchoice>.
83            The legend is also dockable, which means that it can be detached
84            from the main window by clicking on the small button next to the
85            close button. It can be attached again by clicking the same button
86            again.
87            </para>
88            <para>
89            The status bar (3) displays different information depending on the
90            current context. If the user is selecting an item from the menu
91            then the status bar will display a short help message indicating
92            what each menu item is for. If the user has a tool selected then
93            the position of the cursor on the map is displayed.
94            </para>
95            <para>
96            The tool bar (4) provides quick access to the commonly needed tools.
97            By hovering over each button the user can see a short messages
98            describing what the tool does. The tools provided are Zoom In, Zoom
99            Out, Pan, Full Extent, Full Layer Extent, Full Shape Extent, Indentify,
100            and Label. Each of the tools will be explained in further detail later
101            in the manual.
102            </para>
103          </section>          </section>
104    
105    </chapter>    </chapter>
106    
107    <chapter><title>Session Management</title>    <chapter><title>Session Management</title>
     <para>  
     </para>  
108    
109          <section><title>Starting a new session</title>          <section><title>Starting a New Session</title>
110          <para>          <para>
111            A new session can be started from
112            <menuchoice>
113            <guimenu>File</guimenu>
114            <guimenuitem>New Session</guimenuitem>
115            </menuchoice>.
116    
117            If a session is already loaded and has been modified without
118            being saved a prompt will ask if the current session should
119            be saved.
120    
121          </para>          </para>
122          </section>          </section>
123    
124          <section><title>Opening a session</title>          <section><title>Opening a Session</title>
125          <para>          <para>
126            A session can be opened from
127            <menuchoice>
128            <guimenu>File</guimenu>
129            <guimenuitem>Open Session</guimenuitem>
130            </menuchoice>.
131    
132            If a session is already loaded and has been modified without
133            being saved a prompt will ask if the current session should
134            be saved.
135          </para>          </para>
136          </section>          </section>
137    
138          <section><title>Saving a session</title>          <section><title>Saving a Session</title>
139          <para>          <para>
140            A session can be saved from
141            <menuchoice>
142            <guimenu>File</guimenu>
143            <guimenuitem>Save Session</guimenuitem>
144            </menuchoice>.
145    
146          </para>          </para>
147          </section>          </section>
148    
149          <section><title>The session info-tree</title>          <section><title>The Session Info-Tree</title>
150          <para>          <para>
151                  (primarily for developers)                  (primarily for developers)
152          </para>          </para>
# Line 66  Line 157 
157      <para>      <para>
158      </para>      </para>
159    
160          <section><title>Adding and removing layers</title>          <section><title>Adding and Removing Layers</title>
161          <para>          <para>
162          </para>          </para>
163          </section>          </section>
# Line 76  Line 167 
167          </para>          </para>
168          </section>          </section>
169    
170          <section><title>Object identification</title>          <section><title>Object Identification</title>
171          <para>          <para>
172          </para>          </para>
173          </section>          </section>
174    
175          <section><title>Object labelling</title>          <section><title>Object Labelling</title>
176          <para>          <para>
177          </para>          </para>
178          </section>          </section>
179    
180          <section><title>The legend</title>          <section><title>The Legend</title>
181          <para>          <para>
182          </para>          </para>
183          </section>          </section>
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192      <para>      <para>
193      </para>      </para>
194    
195          <section><title>Layer types</title>          <section><title>Types of Layers</title>
196          <para>          <para>
197          </para>          </para>
198          </section>          </section>
# Line 131  Line 222 
222      <para>      <para>
223      </para>      </para>
224    
225          <section><title>Adding and removing classes</title>          <section><title>Adding and Removing Classes</title>
226          <para>          <para>
227          </para>          </para>
228          </section>          </section>
229    
230          <section><title>Editing symbols</title>          <section><title>Symbols</title>
231          <para>          <para>
232          </para>          </para>
233          </section>          </section>
234    
235          <section><title>Automatic generation of classes</title>          <section><title>Generating Classes</title>
236          <para>          <para>
237          </para>          </para>
238          </section>          </section>
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