#975: WxGUI should provide area measurement tool --------------------------+------------------------------------------------- Reporter: marisn | Owner: [email protected] Type: enhancement | Status: new Priority: normal | Milestone: 6.5.0 Component: wxGUI | Version: unspecified Resolution: | Keywords: d.measure Platform: All | Cpu: All --------------------------+------------------------------------------------- Comment (by glynn):
Replying to [comment:9 cmbarton]: > I don't remember what all d.measure did, however. The current GUI implementation gives: segment length, segment bearing, total multisegment length, and has a nice (and easily parsable) output format. Does d.measure do that? For area, is it only calculated for closed polygons or for open ones too? d.measure (now m.measure in 7.0) calculates the cumulative length obtained from passing each pair of adjacent points to G_distance() and, if 3 or more points are given, the area from G_area_of_polygon(). There should probably be an option to include the distance between the last and first points, i.e. calculate the perimeter. Currently, for N points it calculates the length for N-1 segments; if you want the perimeter, you have to duplicate the first point as the last point. -- Ticket URL: <https://trac.osgeo.org/grass/ticket/975#comment:10> GRASS GIS <http://grass.osgeo.org>
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