I think you should run r.in.ascii
http://grass.osgeo.org/grass63/manuals/html63_user/r.in.ascii.html
if you want to use r.sun you have to import the digital terrain model
first. then you have to create a slope and an aspect rasters and then
run r.sun with the r.slope.aspect command
http://grass.osgeo.org/grass63/manuals/html63_user/r.slope.aspect.html
and then finally running r.sun
El 24/08/12 03:13, sotototo escribió:
Hi,
Im new to Grass GIS and I have the same problem.
I have an ascii Lidar data set with XYZ values in the following format.
ncols 1999
nrows 1998
xllcorner 459000.27618609
yllcorner 298999.76202791
cellsize 0.5
NODATA_value -9999
-9999 -9999 -9999 -9999 -9999 -9999 -9999 -9999 -9999 -9999 -9999 -9999
-9999 -9999 -9999 -9999 -9999 -9999 -9999 -9999 -9999 -9999 -9999 -9999
-9999 -9999 -9999 -9999 -9999 -9999 -9999 -9999 -9999 -9999 -9999
When I run r.in.arc I get the following error.
Illegal "yllcorner" value in header: "298999.76202791"
Illegal latitude for North
ERROR: Can't get cell header
I tried r.in.xyz and I got this error.
ERROR: Not enough data columns. Incorrect delimiter or column number? Found
the following character(s) in row 1:
[ncols 1999]
I also tried the r3.in.ascii and i got this error.
ERROR: readHeaderString: header value invalid
..........
So could you please tell me if i do something wrong?
I actually want to use the r.sun algorithm to calculate solar radiation and
if Im not mistaken the first step is to import first the ascii file to
GRASS.
Thank you
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Alberto Pettazzi
MeteoGalicia - Departamento de Climatología y Observación
Consellería de Medio Ambiente, Territorio e Infraestruturas
Rúa de Roma, 6
15707 Santiago de Compostela. A Coruña
Teléfono: +34-881-999646
e-mail: alberto.petta...@meteogalicia.es
<mailto:alberto.petta...@meteogalicia.es>
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