Field Definitions are Available Here
Collection
float(var)
Mandatory if applicable
The minimum distance possible between two adjacent depth values, expressed in depth distance units of measure.
1
DepthDatumName, DepthDistanceUnits, DepthEncodingMethod
1
Must be used with DepthDatumName, DepthDistanceUnits, DepthEncodingMethod.
METADATA > COLLECTIONMETADATA > Spatial > CoordinateSystemContainer > VerticalCoordinateSystemContainer > DepthSystemDefinition.DepthResolution
/gmi:MI_Metadata/gmd:identificationInfo/gmd:MD_DataIdentification/gmd:spatialResolution/gmd:MD_Resolution/gmd:vertical/gmd:value
See also CD_VerticalDatum and CD_VerticalDatumType in 19111 - Changed to MD Resolution.
Spatial Information