[gdal-dev] stere

[Patrick L. Francis]

Hello! I have been banging my head against the wall trying to use the 
polar stereographic projection, and am hoping one of you that is smarter 
than me, which would likely be all of you can help!  lol

this projection:
http://www.nco.ncep.noaa.gov/pmb/docs/on388/tableb.html#GRID202

when applied via gdal_translate and converted to mercator, results in.. 
how to describe? well here is a screenshot if you are interested
http://www.blindleper.com/files/gdal/gdal_warp_merc.jpg

and here is what the original looks like before the projection is 
assigned and warped (I know the merc warp is good, because I use it on 
many other things.. I've just never tried polar stereographic before):
http://www.blindleper.com/files/gdal/original.jpg

so clearly i'm doing something wrong... I've tried varations of lat_ts 
like this:
#cs2cs +proj=latlong +datum=WGS84 +to +proj=stere +lat_ts=37 
+ellps=WGS84 +lat_0=90 +lon_0=-105 +k=1 +x_0=0 +y_0=0 +datum=WGS84 
+units=m +no_defs
#cs2cs +proj=latlong +datum=WGS84 +to +proj=stere +lat_ts=7.838 
+ellps=WGS84 +lat_0=90 +lon_0=-105 +k=1 +x_0=0 +y_0=0 +datum=WGS84 
+units=m +no_defs

because i'm not sure what "La1	7.838N" and such mean on that projection 
above...

Anyway, I hope someone can help lead me away from the dark side and into 
the light... this is driving me bonkers!

cheers,

--BlindLeper




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