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@@ -101,6 +101,7 @@ Query information from selected point(s). <em>v.distance</em> takes
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points from a vector map as input instead of stdin. A new vector map
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points from a vector map as input instead of stdin. A new vector map
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with query points has to be created before the map can be analysed.
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with query points has to be created before the map can be analysed.
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<p>
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<p>
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+
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Create query map (if not present):
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Create query map (if not present):
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<div class="code"><pre>
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<div class="code"><pre>
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@@ -159,14 +160,46 @@ v.to.db map=vdistance_vectors option=length column=length
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v.univar vdistance_vectors column=length
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v.univar vdistance_vectors column=length
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</pre></div>
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</pre></div>
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+<h3>Print distance between points</h3>
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+
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+Example for a Latitude-longitude location (EPSG 4326):
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+<div class="code"><pre>
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+# points along the equator
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+echo "0|-61|1" | v.in.ascii output=pnt1 input=-
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+echo "0|-58|1" | v.in.ascii output=pnt2 input=-
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+
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+# here, distances is in degree units
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+v.distance from=pnt1 to=pnt2 upload=dist col=distance -p --q
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+from_cat|distance
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+1|3
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+</pre></div>
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+
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<h3>Print distance matrix</h3>
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<h3>Print distance matrix</h3>
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+Note: Matrix-style output is enabled only for flag <em>-a</em> and one
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+given upload option.
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+<p>
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+Spearfish sample data location:
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<div class="code"><pre>
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<div class="code"><pre>
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v.distance -pa from=archsites to=archsites upload=dist col=dist
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v.distance -pa from=archsites to=archsites upload=dist col=dist
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</pre></div>
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</pre></div>
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-Note: Matrix-like output is enabled only for flag <b>-a</b> and one
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-given upload option.
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+<p>
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+North Carolina sample data location:
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+
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+<div class="code"><pre>
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+v.distance -pa from=hospitals to=hospitals upload=dist \
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+ col=dist separator=comma
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+from_cat to_cat dist
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+ 1 2 3 4 5 ...
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+1 0 7489.10 339112.17 70900.39 70406.23 ...
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+2 7489.10 0 345749.12 76025.46 75538.87 ...
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+3 339112.17 345749.12 0 274153.19 274558.98 ...
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+4 70900.39 76025.46 274153.19 0 501.11 ...
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+5 70406.23 75538.87 274558.98 501.11 0 ...
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+...
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+</pre></div>
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+
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<h2>SEE ALSO</h2>
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<h2>SEE ALSO</h2>
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@@ -177,7 +210,7 @@ given upload option.
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</em>
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</em>
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-<h2>AUTHOR</h2>
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+<h2>AUTHORS</h2>
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Janne Soimasuo 1994, University of Joensuu, Faculty of Forestry, Finland<br>
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Janne Soimasuo 1994, University of Joensuu, Faculty of Forestry, Finland<br>
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Cmd line coordinates support: Markus Neteler, ITC-irst, Trento, Italy<br>
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Cmd line coordinates support: Markus Neteler, ITC-irst, Trento, Italy<br>
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Markus Neteler