Adding WCS to ArcMap - Failed to open raster dataset

Question

I would like to add the WCS of this dataset to ArcMap: https://hfrnet-tds.ucsd.edu/thredds/catalog/HFR/USWC/500m/hourly/RTV/catalog.html?dataset=HFR/USWC/500m/hourly/RTV/HFRADAR_US_West_Coast_500m_Resolution_Hourly_RTV_best.ncd

• I go to "Add Data"
• Select GIS Servers
• Select Add WCS Server
• Paste the WCS URL (https://hfrnet-tds.ucsd.edu/thredds/wcs/HFR/USWC/500m/hourly/RTV/HFRADAR_US_West_Coast_500m_Resolution_Hourly_RTV_best.ncd?service=WCS&version=1.0.0&request=GetCapabilities)

I see three grids available (latitudinal... surface_eastward..., surface_northward..) but when I try to add them to the map I get an error: "A selected item could not be added to the map Failed to open raster dataset"

How can I add this data to ArcMap?

• nmtoken: the WCS URL is just https://hfrnet-tds.ucsd.edu/thredds/wcs/HFR/USWC/500m/hourly/RTV/HFRADAR_US_West_Coast_500m_Resolution_Hourly_RTV_best.ncd?
• Nena: I just tried this. I pasted the URL, clicked "Get Coverages," selected everything (3 items), clicked "OK," clicked "Add," selected the 3 items, clicked "Add," and still get the same message: "A selected item could not be added to the map Failed to open raster dataset" Did it work for you?
• nmtoken: I get a similar message. I can see that ArcMap sends a DescribeCoverage request, the WCS service responds but takes too long to return a complete document. So this appears to be an issue with the WCS service, rather than ArcMap.
• nmtoken: In QGIS I also get an error 2019年09月26日T15:33:00 CRITICAL Invalid Layer :

Answer 1

The issue here is to do with a misconfiguration of the WCS service.

A DescribeCoverage request like below, tells us that the spatial reference system used by the coverage is EPSG:0 [Latitude_Longitude]

https://hfrnet-tds.ucsd.edu/thredds/wcs/HFR/USWC/500m/hourly/RTV/HFRADAR_US_West_Coast_500m_Resolution_Hourly_RTV_best.ncd?service=WCS&request=DescribeCoverage&coverage=DOPx&version=1.0.0&

Gives us:

...
<domainSet>
 <spatialDomain>
 <EnvelopeWithTimePeriod srsName="urn:ogc:def:crs:OGC:1.3:CRS84">
 <gml:pos dimension="2">-122.59346771240234 37.45548629760742</gml:pos>
 <gml:pos dimension="2">-122.0468978881836 38.13872528076172</gml:pos>
 <gml:timePosition>2011年10月01日T00:00:00Z</gml:timePosition>
 <gml:timePosition>2019年09月26日T09:00:00Z</gml:timePosition>
 </EnvelopeWithTimePeriod>
 <gml:RectifiedGrid srsName="EPSG:0 [Latitude_Longitude]" dimension="2">
 <gml:limits>
 <gml:GridEnvelope>
 <gml:low>0 0</gml:low>
 <gml:high>105 152</gml:high>
 </gml:GridEnvelope>
 </gml:limits>
 <gml:axisName>x</gml:axisName>
 <gml:axisName>y</gml:axisName>
 <gml:origin>
 <gml:pos>-122.59346771240234 37.45548629760742</gml:pos>
 </gml:origin>
 <gml:offsetVector>0.005205426897321429 0.0</gml:offsetVector>
 <gml:offsetVector>0.0 0.004494993310225637</gml:offsetVector>
 </gml:RectifiedGrid>
 </spatialDomain>
...

As part of the operation of loading any WCS data ArcMap (and QGIS) look first at the GetCapabilities response, then a DescribeCoverage (for the selected coverages), and on the basis of the information in the DescribeCoverage response, make a GetCoverage request.

The problem is that EPSG:0 [Latitude_Longitude] is not a known CRS.

A user selecting a CRS like crs:84 in their client will result in a request like:

https://hfrnet-tds.ucsd.edu/thredds/wcs/HFR/USWC/500m/hourly/RTV/HFRADAR_US_West_Coast_500m_Resolution_Hourly_RTV_best.ncd?SERVICE=WCS&VERSION=1.0.0&REQUEST=GetCoverage&FORMAT=GeoTIFF_Float&COVERAGE=DOPx&TIME=2011年10月01日T05:00:00Z&BBOX=-122.33565175758218402,37.79040736778109988,-122.30471384300375348,37.80380421058804075&CRS=OGC:CRS84&RESPONSE_CRS=OGC:CRS84&WIDTH=6&HEIGHT=3

Which gives an error along the lines of not a valid request expecting CRS of EPSG:0 [Latitude_Longitude]...