I'm relatively new to Grass, but I need to import 3D ascii files. For testing
purposes, I altered precip3D_500z50 (from Slovakia Precipitation, GRASS data
downloads) into the following:
north: 5530000.000000
south: 5275000.000000
east: 4631000.000000
west: 4186000.000000
top: 3000.000000
bottom: 0.000000
rows: 3
cols: 3
levels: 3
1.00000 1.00000 2.00000
1.00000 1.00000 1.00000
1.00000 1.00000 1.00000
1.00000 2.00000 2.00000
1.00000 1.00000 2.00000
3.00000 1.00000 1.00000
2.00000 2.00000 2.00000
3.00000 2.00000 2.00000
3.00000 3.00000 2.00000
I kept everything from North - Bottom the same, just altered the rows, cols,
levels and cells. When I visualise this in NVIZ, all is well. But when I
alter the North-Bottom parameters as such:
north: 3.000000
south: 0.000000
east: 3.000000
west: 0.000000
top: 3.000000
bottom: 0.000000
I do not get an error, but I cannot visualise anything. What I'm trying to
do is to understand al these parameters, so I can automate output from other
data sources. Can anybody help me with this problem? Thanks!
Tom van der Putte
--
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On Tue, 2009-01-13 at 04:55 -0800, Tom van der Putte wrote:
I'm relatively new to Grass, but I need to import 3D ascii files. For testing
purposes, I altered precip3D_500z50 (from Slovakia Precipitation, GRASS data
downloads) into the following:
north: 5530000.000000
south: 5275000.000000
east: 4631000.000000
west: 4186000.000000
top: 3000.000000
bottom: 0.000000
rows: 3
cols: 3
levels: 3
1.00000 1.00000 2.00000
1.00000 1.00000 1.00000
1.00000 1.00000 1.00000
1.00000 2.00000 2.00000
1.00000 1.00000 2.00000
3.00000 1.00000 1.00000
2.00000 2.00000 2.00000
3.00000 2.00000 2.00000
3.00000 3.00000 2.00000
I kept everything from North - Bottom the same, just altered the rows, cols,
levels and cells. When I visualise this in NVIZ, all is well. But when I
alter the North-Bottom parameters as such:
north: 3.000000
south: 0.000000
east: 3.000000
west: 0.000000
top: 3.000000
bottom: 0.000000
I do not get an error, but I cannot visualise anything. What I'm trying to
do is to understand al these parameters, so I can automate output from other
data sources. Can anybody help me with this problem? Thanks!
Tom van der Putte
Tom, if your data are defined on a metric projection system, as the
initial region settings suggest, then you only mess-up the region by
setting, e.g., the north boundary from "north: 5530000.000000" to
"north: 3.000000".
In simple words, the area that will show up with your region-definitions
does not coincide with your data (which are "locked"=georeferenced to a
specific geographic location on the earth's surface).
Hopefully I helped somehow.
Kind regards, Nikos