[GRASS-SVN] r36514 - grass/trunk/vector/v.select
svn_grass at osgeo.org
svn_grass at osgeo.org
Sun Mar 29 10:49:46 EDT 2009
Author: martinl
Date: 2009-03-29 10:49:45 -0400 (Sun, 29 Mar 2009)
New Revision: 36514
Modified:
grass/trunk/vector/v.select/v.select.html
Log:
v.select manual page updated (GEOS support)
Modified: grass/trunk/vector/v.select/v.select.html
===================================================================
--- grass/trunk/vector/v.select/v.select.html 2009-03-29 14:22:05 UTC (rev 36513)
+++ grass/trunk/vector/v.select/v.select.html 2009-03-29 14:49:45 UTC (rev 36514)
@@ -1,17 +1,37 @@
<h2>DESCRIPTION</h2>
<em>v.select</em> allows the user to select features from a vector
-by features from another one.
+map by features from another one.
+<p>
+Supported operators (without GEOS):
+<ul>
+ <li><tt>overlaps</tt> - features partially or completely overlap
+</ul>
+
+Supported operators (with GEOS):
+<ul>
+ <li><tt>equals</tt> - features are spatially equals</li>
+ <li><tt>disjoint</tt> - features do not spatially intersect</li>
+ <li><tt>intersects</tt> - features spatially intersect</li>
+ <li><tt>touches</tt> - features spatially touches</li>
+ <li><tt>crosses</tt> - features spatially crosses</li>
+ <li><tt>within</tt> - feature A is completely inside feature B</li>
+ <li><tt>contains</tt> - feature B is completely inside feature A</li>
+ <li><tt>overlaps</tt> - features spatilly overlap</li>
+ <li><tt>relate</tt> - feature A is spatially related to feature B</li>
+</ul>
+
<h2>NOTES</h2>
Only features with category numbers will be considered. If required
-the <em>v.category</em> module can be used to add them. Typically
-boundaries do not need to be given a category number, as an area's
-attributes are inherited from the centroid. Typically points, lines, and
-centroids will always want to have a cat number.
+the <a href="v.category.html">v.category</a> module can be used to add
+them. Typically boundaries do not need to be given a category number,
+as an area's attributes are inherited from the centroid. Typically
+points, lines, and centroids will always want to have a cat number.
+
<p>
-e.g. take a road which separates two farms. It is ambiguous as to which
+E.g. take a road which separates two farms. It is ambiguous as to which
farm an attribute that is attached to the road belongs to. The boundary
only needs a cat number if it will hold its own attributes, such as road
name or pavement form. A centroid in each paddock holds the information
@@ -20,18 +40,17 @@
<h2>EXAMPLES</h2>
-Extract forest fire points from larger fire map:
+Extract forest fire points from larger fire vector map:
<div class="code"><pre>
-v.select ainput=fire binput=forest output=forest_fire
+v.select ainput=fire binput=forest output=forest_fire operator=overlaps
</pre></div>
-<P>
Extract Italian rivers from VMAP0 watercourses map:
<div class="code"><pre>
v.select ainput=watrcrsl_eurnasia_wgs84 binput=italy_area \
- output=watrcrsl_italy operator=overlap
+ output=watrcrsl_italy operator=overlaps
</pre></div>
@@ -39,13 +58,20 @@
<em>
<a HREF="v.category.html">v.category</a>,
-<a HREF="v.overlay.html">v.overlay</a>,
-<a HREF="sql.html">GRASS SQL interface</a></em>
+<a HREF="v.overlay.html">v.overlay</a>
+</em>
+<p>
+<em>
+<a HREF="sql.html">GRASS SQL interface</a>
+</em>
+
<h2>AUTHORS</h2>
-Radim Blazek
+Radim Blazek<br>
+Updated by Martin Landa, CTU in Prague, Czech Republic (GEOS support)
+
<p>
<i>Last changed: $Date$</i>
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