[mapserver-users] WCS layer units question...

[Rahkonen Jukka (MML)]

Hi,

WCS users are supposed to read the metadata with DescribeCoverage, for example https://avoin-visukuva.nls.fi/ortokuvat-ja-korkeusmallit/wcs/v1?service=WCS&version=2.0.1&request=DescribeCoverage&coverageID=ortokuva_vari
The units can be configured in the mapfile with “wcs_band_uom”. I do not know if it is possible to configure the outputformat to write uom also into the TIFF. That is something that GDAL should do.

-Jukka Rahkonen-



Lähettäjä: MapServer-users <mapserver-users-bounces at lists.osgeo.org> Puolesta Carl Godkin
Lähetetty: keskiviikko 12. tammikuuta 2022 3.58
Vastaanottaja: Mapserver-Users (mapserver-users at lists.osgeo.org) <mapserver-users at lists.osgeo.org>
Aihe: [mapserver-users] WCS layer units question...

Hi,

I have a local WCS & WMS server.

I am trying to figure out if I can somehow define the Z units of a terrain layer I'm serving.

The single band from the individual GeoTIFF files providing the terrain data looks like this (from gdalinfo):

Band 1 Block=512x512 Type=Float32, ColorInterp=Gray
  Description = Layer_1
  NoData Value=-999999
  Unit Type: m     <===================================== units are meters
  Metadata:
    LAYER_TYPE=athematic
    RepresentationType=ATHEMATIC

but when I download a GeoTIFF using a WCS GetCoverage request on this layer, the GeoTIFF's single band just looks like this:

Band 1 Block=571x3 Type=Float32, ColorInterp=Gray

without "Unit Type."

I also tried using
   UNITS Meters
in my LAYER definition in my map file (copying an example I found among the case studies on the web site) but it didn't seem to have any effect.

Is there some way to define and retrieve the Z units for a WCS server?

Thanks very much.

carl
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