On Sep 7, 2009, at 7:50 AM, Hamish wrote:
Tim Holland wrote:
But when I try exactly the same code with the higher
resolution version,
r.in.gdal input=/Users/usr/datasets/c_1km/hdr.adf
output=IPCC_Carbon_1km --o -o
I get
WARNING: G_set_window(): Illegal latitude for North
and it will not import.
in grass 6.5 and 7 r.in.gdal has a new -l flag to get around
that. GRASS in lat/lon mode will refuse to accept e.g. +91 as
a valid latitude. If georeferencing does not exist it uses
pixel/cell values as north and east, and if there are more than
90 rows you get an error.
I've also noticed rounding errors coming from Arc raster sources,
especially at higher resolutions. The cell size will be something
like 0.000277778 (for 1sec) instead of having more digits. Added up
for a full degree, you get slightly more than a degree.
Probably something to do with single precision that is common in Arc.
I get this when downloading DEM data from the USGS Seamless.
-----
William Kyngesburye <kyngchaos*at*kyngchaos*dot*com>
http://www.kyngchaos.com/
The equator is so long, it could encircle the earth completely once.
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