Hello,
Using conda installed GDAL 3.2.1
I think I've stumbled on a bug with the BAG driver. It seems as though
when you use Create() to make a BAG, it writes the dimensionSize xml
attribute in the wrong order. It sets the column dimension size to the row
dimensionSize xml attribute, and row to column. I found this on examining
the xml manually, see blob below.
<gmd:axisDimensionProperties>
<gmd:MD_Dimension>
<gmd:dimensionName>
<gmd:MD_DimensionNameTypeCode codeList="
http://www.isotc211.org/2005/resources/Codelist/gmxCodelists.xml#MD_DimensionNameTypeCode";
codeListValue="row">row</gmd:MD_DimensionNameTypeCode>
</gmd:dimensionName>
* <gmd:dimensionSize> <gco:Integer>546</gco:Integer>
</gmd:dimensionSize>*
<gmd:resolution>
<gco:Measure uom="m">2.0</gco:Measure>
</gmd:resolution>
</gmd:MD_Dimension>
</gmd:axisDimensionProperties>
This bug does not affect viewing the BAG in QGIS, as it seems like QGIS
just computes the size using the actual array. I found that GDAL created
BAGs would not load in Caris, a software for viewing bathymetric data. I
believe that is because Caris is using the dimensionSize xml instead of
calculating size from the data. If I swap row/col dimensionSize, the BAG
then works in Caris.
Seems like a relatively simple fix (assuming I am right about this), please
let me know if I need to submit it somewhere else.
Thanks,
Eric
--
Eric Younkin
Physical Scientist
NOAA OCS, Hydrographic Systems and Technology Branch
1315 East-West Highway
N/CS11, Room 6604
Silver Spring, MD 20910
Office: 240-847-8208
Cell: 828-331-8197
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