I have data I am publishing a WMS layer representing data under the surface of the water, say temperature at 100m depth. What is the accepted way to represent this in WMS GetCapabilities document?
Do I define the dimension like:
<Dimension name="elevation" units="EPSG:5030" unitSymbol="m">0,50,100</Dimension>
<Dimension name="elevation" units="EPSG:5030" unitSymbol="m">0,-50,-100</Dimension>
or something else or should a custom dimension be used in this case?
EPSG:5030 is a length parameter, it doesn't indicate that it's related to any projection or that it might indicate distance from mean sea level for that matter. see http://trac.osgeo.org/geotiff/wiki/VerticalCS
EPSG:5030 represents height above the WGS85 ellipsoid. I found a reference to EPSG:5715, but it doesn't say much other than it's 'msl depth' - does this mean values below msl should be positive?