id,summary,reporter,owner,description,type,status,priority,milestone,component,version,severity,resolution,keywords,cc 5789,warp: reprojecting from south polar stereographic to full world 4326 with big -wm fails,Even Rouault,Even Rouault,"Reported as http://lists.osgeo.org/pipermail/gdal-dev/2014-December/040706.html {{{ I am trying to use gdalwarp to reproject a raster file from polar stereo to WGS84. The original raster has nodata value 127 and 0's and 1's as real data values. After warping, the file contains only nodata values, i.e., all real data got lost. Could anyone help me with it. The data comes from https://secure.antarctica.ac.uk/data/bedmap2/bedmap2_tiff.zip The raster file is bedmap2_icemask_grounded_and_shelves.tif from that zip file. gdalinfo --version GDAL 1.10.0, released 2013/04/24 I am using the command line below gdalwarp --config GDAL_CACHEMAX 500 -wm 500 -t_srs EPSG:4326 -te -180 -90 180 90 -multi -srcnodata 127 -dstnodata 127 bedmap2_icemask_grounded_and_shelves.tif bedmap2_icemask_grounded_and_shelves_reproj.tif Some information for the original raster: gdalinfo -stats bedmap2_icemask_grounded_and_shelves.tif Driver: GTiff/GeoTIFF Files: bedmap2_icemask_grounded_and_shelves.tif bedmap2_icemask_grounded_and_shelves.tif.ovr bedmap2_icemask_grounded_and_shelves.tfw bedmap2_icemask_grounded_and_shelves.tif.aux.xml Size is 6667, 6667 Coordinate System is: PROJCS[""WGS_1984_Stereographic_South_Pole"", GEOGCS[""WGS 84"", DATUM[""WGS_1984"", SPHEROID[""WGS 84"",6378137,298.257223563, AUTHORITY[""EPSG"",""7030""]], AUTHORITY[""EPSG"",""6326""]], PRIMEM[""Greenwich"",0], UNIT[""degree"",0.0174532925199433], AUTHORITY[""EPSG"",""4326""]], PROJECTION[""Polar_Stereographic""], PARAMETER[""latitude_of_origin"",-71], PARAMETER[""central_meridian"",0], PARAMETER[""scale_factor"",1], PARAMETER[""false_easting"",0], PARAMETER[""false_northing"",0], UNIT[""metre"",1, AUTHORITY[""EPSG"",""9001""]]] Origin = (-3333500.000000000000000,3333500.000000000000000) Pixel Size = (1000.000000000000000,-1000.000000000000000) Metadata: AREA_OR_POINT=Area Image Structure Metadata: INTERLEAVE=BAND Corner Coordinates: Upper Left (-3333500.000, 3333500.000) ( 45d 0' 0.00""W, 48d27'31.20""S) Lower Left (-3333500.000,-3333500.000) (135d 0' 0.00""W, 48d27'31.20""S) Upper Right ( 3333500.000, 3333500.000) ( 45d 0' 0.00""E, 48d27'31.20""S) Lower Right ( 3333500.000,-3333500.000) (135d 0' 0.00""E, 48d27'31.20""S) Center ( 0.0000000, 0.0000000) ( 0d 0' 0.01""E, 90d 0' 0.00""S) Band 1 Block=128x128 Type=Byte, ColorInterp=Gray Min=0.000 Max=1.000 Minimum=0.000, Maximum=1.000, Mean=0.112, StdDev=0.315 NoData Value=127 Overviews: 3334x3334, 1667x1667, 834x834, 417x417, 209x209 Metadata: STATISTICS_MAXIMUM=1 STATISTICS_MEAN=0.11176160412634 STATISTICS_MINIMUM=0 STATISTICS_STDDEV=0.31507293640332 Image Structure Metadata: PIXELTYPE=SIGNEDBYTE OBJECTID 0 0 Value 0 0 Count 1 0 1 0 12104872 2 1 1523082 }}}",defect,closed,normal,1.11.2,Algorithms,unspecified,normal,fixed,warp,