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<div class="moz-cite-prefix">I think you should run r.in.ascii<br>
<br>
<a class="moz-txt-link-freetext" href="http://grass.osgeo.org/grass63/manuals/html63_user/r.in.ascii.html">http://grass.osgeo.org/grass63/manuals/html63_user/r.in.ascii.html</a><br>
<br>
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<br>
<br>
<a class="moz-txt-link-freetext" href="http://grass.osgeo.org/grass63/manuals/html63_user/r.slope.aspect.html">http://grass.osgeo.org/grass63/manuals/html63_user/r.slope.aspect.html</a><br>
<br>
and then finally running r.sun<br>
<br>
El 24/08/12 03:13, sotototo escribió:<br>
</div>
<blockquote cite="mid:1345770838982-4997492.post@n6.nabble.com"
type="cite">
<pre wrap="">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
--
View this message in context: <a class="moz-txt-link-freetext" href="http://osgeo-org.1560.n6.nabble.com/Importing-ASCII-file-tp4984276p4997492.html">http://osgeo-org.1560.n6.nabble.com/Importing-ASCII-file-tp4984276p4997492.html</a>
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</pre>
</blockquote>
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