[GRASS-user] Points, Distances, and, Bearings.
hamish_b at yahoo.com
Tue Mar 1 03:03:51 EST 2011
> > How do I enter a point, a bearing from that point, and a
> > distance from that point, plot the point, the bearing line,
> > and, the distance arc?
> check out the d.rhumbline, d.geodesic, r.transect,
> r.profile, and m.cogo modules.
... and since I've wanted such a thing for a while for laying out long
transect lines, I've just added a new v.in.geodesic module to the AddOns
Creates a vector map containing a great circle line.
vector, geodesic, great circle, transect
v.in.geodesic map=name [coor=east1,north1,east2,north2]
[line=east,north,azimuth,distance] [nsteps=value] [distance=value]
[--overwrite] [--verbose] [--quiet]
--o Allow output files to overwrite existing files
--v Verbose module output
--q Quiet module output
map Name for output vector map
coor Starting and ending coordinates
line Transect definition
nsteps Number of vertices to place along the line
distance Distance between vertices in meters
It might have some bugs, and should be rewritten in C. (treat as a
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