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r.circle.1grass
Langue: en
Version: 313437 (ubuntu - 07/07/09)
Section: 1 (Commandes utilisateur)
NAME
r.circleDESCRIPTION
This module creates a raster map containing concentric rings around a given point. The cell values are increasing linear from the center point to outer rings. Minimum and maximum radius can be selected. Optionally a "donut" ring can be created to use as (binary) filter for i.ifft inverse Fourier transform (apply filter with r.mask).EXAMPLES
Generate a circle at current map center with a radius of 300m:EASTCENTER=`g.region -c | awk ' /region center easting:/ { print $4 }'`
NORTHCENTER=`g.region -c | awk ' /region center northing:/ { print $4 }'`
r.circle -b out=circle coordinate=$EASTCENTER,$NORTHCENTER max=300
SEE ALSO
g.remove, g.rename, i.fft, i.ifftAUTHOR
Bill Brown, U.S. Army Construction Engineering Research LaboratoryAdditional flag/min/max parameter by Markus Neteler, University of Hannover
Last changed: $Date: 2006/04/13 19:01:37 $
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