GRASSers:
Is there any way to generate a raster in which the pixel values are the directions (in radians or degrees) to the nearest vector object, e.g. a point, line, or polygon ("nearest" being calculated as Euclidean distance)?
--j
--
Jonathan A. Greenberg, PhD
Postdoctoral Scholar
Center for Spatial Technologies and Remote Sensing (CSTARS)
University of California, Davis
One Shields Avenue
The Barn, Room 250N
Davis, CA 95616
Phone: 415-763-5476
AIM: jgrn307, MSN: jgrn307@hotmail.com, Gchat: jgrn307
Just a guess...
Maybe v.distance? Create a point raster, on point for each cell in
your raster. Run v.distance and look for the to_angle value
calculated. Then convert the points back to raster....
v.distance man page...
http://www.ces.iisc.ernet.in/grass/grass64/manuals/html64_user/v.distance.html
Or you could try something with the r.distance module and the
east1,north1 values....
Good luck
daniel
On Mon, Nov 30, 2009 at 4:44 PM, Jonathan Greenberg
<greenberg@ucdavis.edu> wrote:
GRASSers:
Is there any way to generate a raster in which the pixel values are the
directions (in radians or degrees) to the nearest vector object, e.g. a
point, line, or polygon ("nearest" being calculated as Euclidean distance)?
--j
--
Jonathan A. Greenberg, PhD
Postdoctoral Scholar
Center for Spatial Technologies and Remote Sensing (CSTARS)
University of California, Davis
One Shields Avenue
The Barn, Room 250N
Davis, CA 95616
Phone: 415-763-5476
AIM: jgrn307, MSN: jgrn307@hotmail.com, Gchat: jgrn307
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