Hi all,
again I reached the point I did half a year ago: jgrass only can handle
'metric' rasters, which means raster-cells of equal sizes, same NS, OW
resolution.
I work an a latlon-projection and therefore I cannot use jgrass.
? 1 I guess, r.stream cannot handle latlong-projections?
? 2 I guess, r.stream doesn't have something like h.tca?
(h.tca: makes an accumulation map from a direction map)
? 3 Is it possible to make the accumulation-values non-integer and
weight every grid-cell with its real area size? Then every accumulation
value would indicate its basin-size and so on like in eg. lambert
projection.
What wouldn't work that easy: distances EW and thus angle based
calculations, too.
Again my old PROBLEM:
How to get an accumulation map strickly WITHOUT an DEM from ONLY an
direction map on a LAT-LON map?
Achim
Jarek Jasiewicz schrieb:
Markus Neteler pisze:
On Thu, Nov 19, 2009 at 2:35 PM, Achim Kisseler
<a...@jupiter.uni-freiburg.de> wrote:
Dear Markus,
I follow Silvias suggestion and use h.tca in JGRASS.
BTW: Isn't is possible to integrate the horton-tools into grass?
If the license is compliant to GPL (I guess so), yes.
Hortons tools are available in svn add ons as r.stream.* suite:
r.stream.extract, r.stream.order, r.stream.stats etc... see tutorial on
grass wiki
http://grass.osgeo.org/wiki/R.stream.*
Jarek
Markus
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