3
<em>d.measure</em> provides the user with an interactive
4
way to measure the lengths and areas of lines and polygons
5
drawn by the user in the active frame on the graphics
6
monitor. Lines and polygons are drawn using a pointing
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device (mouse). Each line segment is drawn in colors
8
<b>c1</b> and <b>c2</b>. A mouse button menu indicates
9
that the user can find out the geographic coordinates of
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the cursor location, draw line segments between
11
user-specified vertices, and quit <em>d.measure</em>. Lines
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and polygons are defined by the series of vertices marked
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by the user. If more than two successive vertices are
14
drawn, <em>d.measure</em> prints the area encompassed
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(<em>d.measure</em> will assume the area is closed even if
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the user has not joined the first and last vertices).
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<!-- (not [currently] true!) Line lengths are stated in the same units
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as those of the current LOCATION. In a XY-LOCATION, where no units are
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available, <em>d.measure</em> prints a warning and gives results without
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Areas can be stated in hectares, square miles, square meters and
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Lines and polygons drawn using <em>d.measure</em> will
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overlay (not overwrite) whatever display currently appears
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in the active frame on the graphics monitor. The user can,
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<em><a href="d.rast.html">d.rast</a></em> or
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<em><a href="d.vect.html">d.vect</a></em> prior to running
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<em>d.measure</em>, and use raster and/or vector maps as a backdrop.
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<em>d.measure</em> uses all segments drawn by the user when computing area.
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If the user draws an area within another area, the combined
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area of both regions will be output.
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Output lengths in the same units as those of the current LOCATION as
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found in the <tt>PROJ_UNITS</tt> file (see <em>g.proj</em>).
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Volunteers are welcome for this task.
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<em><a href="d.frame.html">d.frame</a></em><br>
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<em><a href="d.graph.html">d.graph</a></em><br>
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<em><a href="d.rast.html">d.rast</a></em><br>
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<em><a href="d.vect.html">d.vect</a></em><br>
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<em><a href="d.where.html">d.where</a></em><br>
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<em><a href="g.proj.html">g.proj</a></em>
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U.S. Army Construction Engineering
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<p><i>Last changed: $Date: 2011-11-08 12:29:50 +0100 (Tue, 08 Nov 2011) $</i>