Hi,

gdalinfo 27002570PAS_dem.tif tells me:
...
PARAMETER["false_easting",6458320.416666666],
...
UNIT["us_survey_feet",0.3048006096012192],

gdalwarp 27002570PAS_dem.tif out.tif -t_srs epsg:4326 tells me in DEBUG mode:

OGRCT: Source: +proj=lcc +lat_1=40.96666666666667 +lat_2=39.93333333333333 +lat_0=39.33333333333334 +lon_0=-77.75 +x_0=1968500 +y_0=0 +datum=NAD83 +units=us-ft +no_defs

My wild guess is that there is something going wrong with the false easting value and the metre/feet conversion.

Hermann

On 2013-04-03 15:36, Reynolds, Scott wrote:
Hi,

I’ve downloaded the file 27002570PAS_dem.zip from
ftp://pamap.pasda.psu.edu/pamap_lidar/cycle1/DEM/South/2008/20000000/
and have attempted to warp the data to WGS84 using gdalwarp.  The output
should be around 75W but is being warped to 91W.  I’m using gdalwarp
1.9.2 which was installed as part of OSGeo4W. Any ideas?

Thanks,

Scott



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