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@@ -8,19 +8,21 @@ component intended for interactive editing and digitizing vector maps
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vector editing GRASS capabilities).
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<p>
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-Note that only vector maps from the current mapset can be opened
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-for editing.
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+Note that only vector maps stored or generated in the <i>current</i>
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+mapset can be opened for editing.
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<p>
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-The digitizer allows editing 2D vector features only (points, lines,
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+The digitizer allows editing of 2D vector features (points, lines,
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centroids, boundaries, and areas).
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+<p>
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Vector features can be selected by mouse (bounding box or simply by
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mouse click, see select threshold
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in <i>Settings→General→Select threshold</i>), or by query
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(eg. by line length, see <i>Settings→Query Tool</i>).
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-<p>
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+<h3>STARTING THE DIGITIZER</h3>
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+
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The vector digitizer can be launched from Map Display toolbar by selecting
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"Digitize" from <i>Tools</i> combobox. Vector map is
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selectable for editing from Digitizer toolbar ("Select vector
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@@ -35,15 +37,35 @@ toolbar <img src="icons/edit.png" alt="icon">.
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The vector digitizer also can also be launched from the command line as a
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stand-alone application <em>g.gui.vdigit</em>.
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-<p>
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-New vector map can be easily created from the digitizer toolbar by
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+<h3>CREATING A NEW VECTOR MAP</h3>
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+
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+A new vector map can be easily created from the digitizer toolbar by
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selecting "New vector map" in "Select vector map"
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combobox. A new vector map is created, added to the current layer tree
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in Layer Manager and opened for editing. "Select vector map"
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-combobox in digitizer toolbar also allows switching easily between
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+combobox in the digitizer toolbar also allows to easily switch between
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vector maps to be edited.
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-<p>
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-The vector digitizer allows you to define a "background" vector map.
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+
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+<h3>EDITING AN EXISTING VECTOR MAP</h3>
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+
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+An existing vector map selected in the digitizer toolbar in the
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+"Select vector map" combobox. This map is then opened for editing
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+and added to the current layer tree in the <em>Layer Manager</em>. This
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+"Select vector map" combobox in the digitizer toolbar also allows
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+to easily switch between vector maps to be edited.
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+
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+<h3>USING A RASTER BACKGROUND MAP</h3>
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+
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+In order to digitize from a raster map, simply load the map into the
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+<em>Map Display</em> using the <em>Layer Manager</em>. Then start digitizing,
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+see below for details.
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+
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+<h3>USING A VECTOR BACKGROUND MAP</h3>
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+
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+The vector digitizer allows you to select a "background" vector map.
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+Loading it within the digitizer is different from simply loading it via
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+<em>Layer Manager</em> since direct interaction with single vector features
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+then becomes possible.<br>
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A background map can be selected from the map layer contextual menu, in
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<em>Layer Manager</em> ("Use as Background Map"). Newly digitized vector
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features are snapped in the given threshold to the features from the
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@@ -275,7 +297,7 @@ boundaries are automatically attached to the chosen points.
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</em>
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<p>
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-See also the <a href="http://grasswiki.osgeo.org/wiki/WxGUI_Vector_Digitizer">wiki page</a>
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+See also the <a href="http://grasswiki.osgeo.org/wiki/WxGUI_Vector_Digitizer">WxGUI Vector Digitizer Wiki page</a>
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including <a href="http://grasswiki.osgeo.org/wiki/WxGUI_Vector_Digitizer#Vector_tutorials">video
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tutorials</a>.
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