Am 14.07.2017 um 19:06 schrieb Patrick L. Francis:
I work with NWS grids a lot for nexrad data. They are in a 1/40 lfm
grid. Your data looks like it might be an a 1/1 LFM grid. Here is the
WKT I would use for a 1/1 LFM grid. Each cell is 190.5 km.
thank you for replying brian.... the output using those specs ended up
looking like:
http://www.blindleper.com/files/gdal/brian_mccormick_try.jpg
from: +proj=stere +lat_0=90 +lat_ts=60 +lon_0=-105 +k=1 +x_0=0 +y_0=0
+a=190500.0 +b=190500.0 +units=m +no_defs
a and b are the parameters for the ellipsoid, which seem totally wrong
now. Brian suggested a scale factor, which would be +to_meter instead of
+units=m.
If you run gdalsrsinfo on a text file with brian's WKT, it reports:
PROJ.4 : '+proj=stere +lat_0=90 +lat_ts=60 +lon_0=-105 +k=1 +x_0=2095500
+y_0=7810500 +a=6371200 +b=6371200 +to_meter=190500 +no_defs '
HTH,
André Joost
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