Opened 10 years ago

Closed 10 years ago

#421 closed defect (invalid)

BAG uncertainty NoData value should be 1000000, not 0

Reported by: jdvarner Owned by: osgeo4w-dev@…
Priority: minor Component: Package
Version: Keywords: GDAL BAG


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 (, page 11): "The *unknown* state for uncertainty is defined to be 0.0"

From IHO S-102 Format Standard (, 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.

Change History (1)

comment:1 by jef, 10 years ago

Resolution: invalid
Status: newclosed

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