[GRASS-user] *Direction* to nearest vector?

[Daniel Victoria]

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 at 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 at hotmail.com, Gchat: jgrn307
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