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Merge pull request #2243 from michaelkirk/feature/crs_help

Fix #13213 - Feature/crs help
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NathanW2 committed Aug 13, 2015
2 parents e9ff061 + 446410e commit 40500d6080b1427a937905a57c5d12250485900f
Showing with 129 additions and 18 deletions.
  1. +18 −0 resources/context_help/QgsGenericProjectionSelector
  2. +111 −18 resources/context_help/QgsProjectProperties
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<h3>Coordinate Reference System Selector</h3>

<p>
The Coordinate Reference System Selector allows you to set the projection for
the current layer.
</p>
<p>
You can find a coordinate system by entering its name, EPSG code or the QGIS ID
into the <label>Filter</label> text field. The list of recently used
coordinate systems are available at the top for quick access.
</p>
<p>
When operating across layers, for example, computing intersections between
two layers, it is important that both layers have the same CRS. To change the
projection of an existing layer, it is insufficient to simply change the CRS
in that layer's properties. Instead you must save the layer as a new layer,
and choose the desired CRS for the new layer.
</p>
@@ -1,34 +1,127 @@
<h3>Project Properties</h3>
This dialog allows you to set a number of properties related to the <label>Project</label>. A Project is a saved set of layers and their settings, as well as other information required to restore the project from disk.<p>
<p>
This dialog allows you to set a number of properties related to the
<label>Project</label>. A Project is a saved set of layers and their settings,
as well as other information required to restore the project from disk.
</p>

<p>
<a href="#general">General Tab</a><br/>
<a href="#crs">Coordinate Reference System (CRS) Tab</a><br/>
<a href="#layers">Identifiable layers Tab</a><br/>
<a href="#layers">Identify layers Tab</a><br/>
</p>

<a name="general">
<h4>General Tab</h4>
</a>
<table border=1>
<tr><td><label>Project title</label></td><td>A descriptive title for the project. This title will be displayed in the title bar of the QGIS window</td></tr>
<tr><td><label>Selection color</label></td><td>Selected features are displayed on the map using this color.</td></tr>
<tr><td><label>Background color</label></td><td>The color of the map canvas.</td></tr>
<tr><td><label>Save paths</label></td><td>Ability to save the paths as absolute or relative.</td></tr>
<tr><td><label>Layer units</label></td><td>Choose the units appropriate for the layers in the project.</td></tr>
<tr><td><label>Precision</label></td><td>Use the manual setting to set the precision of the display in the status bar. As the mouse is moved over the map canvas, the coordinates are updated and displayed in the status bar using the precision you choose. Automatic (the default) results in a default precision based on the map units.</td></tr>
<tr><td><label>Digitizing</label></td><td>The option <label> Enable topological editing</label> enables editing and maintaining common boundaries in polygon mosaics. Editing a vertex in shared boundary will result in updating both boundaries.<p>
To avoid digitizing all vertices of the common boundary select <label>Avoid intersections of new polygons</label>. In the dialog window tick appropriate layers to which the new polygon will be adjusted. Draw the new polygon in the way it overlap the existing one, it will be cut automatically. <p>
<label>Snapping options</label> allows you to set the snapping tolerance in pixels or map units and the snapping mode: <label>to vertex</label>, <label>to segment</label>, <label>to vertex and segment</label> for every layer separately.</td></tr>

<tr>
<td><label>Project&nbsp;title</label></td>
<td>
<p>
A descriptive title for the project. This title will be displayed in the
title bar of the QGIS window.
</p>
</td>
</tr>
<tr>
<td><label>Selection&nbsp;color</label></td>
<td>
<p>
Selected features are displayed on the map using this color.
</p>
</td>
</tr>
<tr>
<td><label>Background&nbsp;color</label></td>
<td><p>The color of the map canvas.</p></td>
</tr>
<tr>
<td><label>Save&nbsp;paths</label></td>
<td>
<p>
Reference files by their absolute path or a path relative to the project
file. If you are sharing your project file with others, or accessing it
from another machine, choose "relative".
</p>
</td>
</tr>
<tr>
<td><label>Measure&nbsp;Tool</label></td>
<td>
<p>
Which ellipsoid should be used to calculate distances when using 'on the
fly' CRS transformation.
</p>
</td>
</tr>
<tr>
<td><label>Canvas&nbsp;units</label></td>
<td>
<p>
Choose the units appropriate for the layers in the project.
</p>
</td>
</tr>
<tr>
<td><label>Precision</label></td>
<td>
<p>
Use the manual setting to set the precision of the display in the status
bar. As the mouse is moved over the map canvas, the coordinates are updated and
displayed in the status bar using the precision you choose. Automatic (the
default) results in a default precision based on the map units.
</p>
</td>
</tr>
<tr>
<td><label>Digitizing</label></td>
<td>
<p>
The option <label>Enable topological editing</label> enables editing and
maintaining common boundaries in polygon mosaics. Editing a vertex in shared
boundary will result in updating both boundaries.
</p>
<p>
To avoid digitizing all vertices of the common boundary select
<label>Avoid intersections of new polygons</label>. In the dialog window
tick appropriate layers to which the new polygon will be adjusted. Draw
the new polygon in the way it overlap the existing one, it will be cut
automatically.
</p>
<p>
<label>Snapping options</label> allows you to set the snapping tolerance
in pixels or map units and the snapping mode: <label>to vertex</label>,
<label>to segment</label>, <label>to vertex and segment</label> for every
layer separately.
</td>
</tr>
</table>

<a name="crs">
<h4>Coordinate Reference System (CRS) Tab</h4>
</a>
The Coordinate Reference System (CRS) tab allows you to set the projection for the current project and enable on the fly transformation. You do not need to have a saved project to setup and enable 'on the fly' CRS transformation.
<p>To use 'on the fly' CRS transformation, click the <label>Enable 'on the fly' CRS transformation</label> check box. Then choose the projection for the project (map canvas) from the list of Geographic or Projected coordinate systems.
<p>You can find a coordinate system by entering its name, EPSG code or the QGIS ID and clicking the <label>Find</label> button.
<p>The list of recently used coordinate systems will be available on the bottom for quick access.

<p>
The Coordinate Reference System (CRS) tab allows you to set the projection for
the current project and enable on the fly transformation. You do not need to
have a saved project to setup and enable 'on the fly' CRS transformation.
</p>
<p>
To use 'on the fly' CRS transformation, click the <label>Enable 'on the fly'
CRS transformation</label> check box. Then choose the projection for the
project (map canvas) from the list of Geographic or Projected coordinate
systems.
</p>
<p>
You can find a coordinate system by entering its name, EPSG code or the QGIS ID
into the <label>Filter</label> text field. The list of recently used
coordinate systems are available at the top for quick access.
</p>

<a name="layers">
<h4>Identifiable layers Tab</h4>
<h4>Identify layers Tab</h4>
</a>
On this tab you can choose on which layers the identify tool will work.
<p>
On this tab you can choose on which layers the identify tool will work.
</p>

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