id,summary,reporter,owner,description,type,status,priority,milestone,component,version,severity,resolution,keywords,cc 4035,Can't open binary grids created with ArcGIS 10,cdestigter,warmerdam,"We're having problems with a binary grid created in ArcGIS 10. The equivalent grid created in 9.3 works fine. With reference to the [http://home.gdal.org/projects/aigrid/aigrid_format.html#w001001 AIG format notes], it seems a few things are different than gdal expects: * magic number is `00 00 27 0A FF FF FC 08`, (not one of the two known magic numbers listed) * tile type for many tiles (seems to be the ones with NODATA as the top left pixel) is 0x80 (not one of the known tile types in gdal/frmts/aigrid ) * RMinSize is 0x0 for each tile (seems odd? maybe okay) The statistics are also a bit weird for the arcgis 10 grid (they're all zero): {{{ Min=1.000 Max=6.000 Minimum=0.000, Maximum=0.000, Mean=0.000, StdDev=0.000 NoData Value=255 Overviews: 1459x1000, 730x500, 365x250 Metadata: STATISTICS_MINIMUM=0 STATISTICS_MAXIMUM=0 STATISTICS_MEAN=0 STATISTICS_STDDEV=0 }}} Not sure why there are a Min/Max but also different min/max statistics in the metadata. With client permission, I've uploaded the two grids for testing purposes, as well as a small python script that reproduces the problem. They're here: http://dl.dropbox.com/u/2649727/gdal-aig-test.zip The test script shows that after converting to GTiff, the ArcGIS 10 grid has nothing but zeroes in it, but the 9.3 grid has the correct data (values 1-6). Tested on gdal 1.7.3",defect,closed,normal,1.8.1,GDAL_Raster,1.7.3,normal,fixed,AIGRID,