Hi, I am trying to convert a GIF image into a GeoTiff image. Input GIF image information: Projection: Polar Stereographic from North Pole, Cente meridian=97W, Height=0 Corners' Lower Left 19.9N 119.6W, Upper Right: 44.5N 59.5W
FWTools_2.0.6 commands used. I used these commands to convert the map from GIF -> GeoTiff # Convert lat/lon corner points to X/Y points cs2cs +proj=latlon +to +proj=stere +lat_0=90 +lon_0=-97 -r <<EOF >./pts_stere_xy.dat +46.4 -140.0 +21.4 -79.0 EOF # Following points created by previous command cs2cs ulx=-3484887.50 uly=-3737084.31 lrx=2686546.21 lry=-8268339.04 ifn=my_image.gif ofn=US_SIGWX_LOWLVL_SFC-400_PIXEL.tif gdal_translate -of GTiff -co PROFILE=GeoTIFF -co INTERLEAVE=PIXEL -a_srs ' +proj=stere +lat_0=90 +lon_0=-97' -a_ullr $ulx $uly $lrx $lry $ifn $ofn ISSUES: The GeoTiff image obtained can be viewed using Openev but the lat/lon points don't look right(Used geodetic lat/lon preference to read lat/lon). I was not able to view the image using Udig. Images uploaded: GIF map: http://dl.dropbox.com/u/31095936/my_image.gif GeoTiff map: http://dl.dropbox.com/u/31095936/US_SIGWX_LOWLVL_SFC-400_PIXEL.tif Q1: Could somebody let me know what I am doing wrong when creating the geotiff with wrong lat/lon points? Q2: Does anyone know why I am not able to see it using Udig? Thank you
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