Hi,
I’m using Grass 6.4.1 on Linux. I calculated the distance to the coastline using the r.grow.distance function. However, the -m parameter to get the results in meters didn’t work. I have now the distance map, but the maximum is 0.945 map units. If I look at g.proj -p the meters parameter is 1.0. However, I calculated the distances over whole China, so a maximum distance of 0.9 meters is not realistic. Could anybody tell me how to convert the map units in realistic distances?
Many thanks in advance!
Sonja
On Fri, Jul 12, 2013 at 9:00 PM, Sonja Jankowfsky
<sonja_jankowfsky@gmx.de> wrote:
Hi,
I'm using Grass 6.4.1 on Linux. I calculated the distance to the coastline
using the r.grow.distance function. However, the -m parameter to get the
results in meters didn't work. I have now the distance map, but the maximum
is 0.945 map units. If I look at g.proj -p the meters parameter is 1.0.
This was a non-feature in GRASS 6.4.1 which has already been fixed in
GRASS GIS 6.4.3RC1:
http://trac.osgeo.org/grass/wiki/Release/6.4.3RC1-News#Majormodulechanges
You may either update to the current
http://trac.osgeo.org/grass/wiki/Release/6.4.3RC4-News
or wait for the final 6.4.3 release or patch locally:
http://trac.osgeo.org/grass/changeset/53054/grass/branches/releasebranch_6_4/raster/r.grow.distance
Best
Markus