Opened 8 years ago

Closed 8 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
Cc:

Description

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.

Change History (1)

comment:1 by jef, 8 years ago

Resolution: invalid
Status: newclosed

Please report this on GDAL TRAC

Note: See TracTickets for help on using tickets.