id summary reporter owner description type status priority component version resolution keywords cc 421 BAG uncertainty NoData value should be 1000000, not 0 jdvarner osgeo4w-dev@… "The NODATA value for the uncertainty in BAG files is being reported as 0. However, I think it should be set to 1000000. There's some inconsistency in the documentation: From OpenNavSurf (http://www.opennavsurf.org/papers/BAG_FSD_Release_1.5.1.pdf, page 11): ""The *unknown* state for uncertainty is defined to be 0.0"" From IHO S-102 Format Standard (http://www.iho.int/iho_pubs/standard/S-102/S-102_Ed1.0.0_Apr12.pdf, page 34): ""The *undetermined* state for uncertainty is defined to be 1,000,000.0 (1.0e6)."" I've checked a sampling of BAGs that we archive here at NOAA/NGDC. All of them have 1000000 in the uncertainty band in areas with no data. Thanks to Mike Wilburn from Esri for pointing out this issue." defect closed minor Package invalid GDAL BAG