Cannot describe coverage. WCS

Question

I have MapServer 6.0.3 installed and running in my local machine. The same for Apache HTTP Server 2.2.22

I have created a .map file using NOTEPAD++ for a WCS service that I want to access using either QGIS and ArcMap as CLIENTS.

1.- When I use the URL:

http://localhost:80/cgi-bin/mapserv.exe?map=/ms4w/apps/raster.map

QGIS CAN list the service (see it), fine, but when I try to add the layer into the canvas it reports:

WCS provider: Cannot get test dataset.
Raster layer: Provider is not valid (provider: wcs, URI: cache=PreferNetwork&
crs=EPSG:4326&format=GTiff&identifier=gebco&url=http://localhost:80/cgi-bin
/mapserv.exe?map%3D/ms4w/tmp/raster.map

If I try adding a GDAL DRIVER (xml file), see below, as a RASTER file:

<WCS_GDAL>
  <ServiceURL>http://localhost:80/cgi-bin/mapserv.exe?map=/ms4w/app/raster.map</ServiceURL>
  <version>1.0.0</version>
  <CoverageName>gebco</CoverageName>
  <supportedCRSs>EPSG:4326</supportedCRSs>
  <PreferredFormat>gtiff</PreferredFormat>
</WCS_GDAL>

I get the following error:

msLoadMap(): Regular expression error. MS_DEFAULT_MAPFILE_PATTERN validation failed.
msEvalRegex(): Regular expression error. String failed expression test. 

2.- ArcMap only list (but again not displaying it) the image by adding just:

http://localhost:80/cgi-bin/mapserv.exe?map=/ms4w/apps/raster.map

So, the same problem as using QGIS..

3.- The only thing which seems to be working so far is adding the following URL into the browser:

http://localhost:80/cgi-bin/mapserv.exe?map=/ms4w/apps/raster.map
&SERVICE=wc‌s
&VERSION=1.0.0
&REQUEST=GetCoverage
&coverage=gebco
&CRS=EPSG:4326
&BBOX=32.4434100,‌​-28.0,55.0017433,0.0
&WIDTH=2707&HEIGHT=3360
&FORMAT=GTiff

After that a pop-up window ask you to download a tiFF into your computer.

But again using either ArcMap or QGIS as clients I am not able to display the raster using MapServer.

My MAP FILE:

MAP  
  NAME WCS_server  
  STATUS ON  
  DEBUG ON
  SIZE 2707 3360
  PROJECTION
    "init=epsg:4326"
  END
  EXTENT 32.4434100 -27.9999999974 55.0017433333 2.63999311301e-009
  UNITS DD
  SHAPEPATH "/ms4w/apps"
  CONFIG "MS_ERRORFILE" "/ms4w/tmp/ms_error.txt"
  MAXSIZE 3361

  OUTPUTFORMAT
    NAME GEOTIFF_16
    DRIVER "GDAL/GTiff"
    MIMETYPE "image/tiff"
    IMAGEMODE INT16
    EXTENSION "tif"
  END

  WEB
    IMAGEPATH "C:/ms4w/tmp/ms_tmp/" 
    IMAGEURL "/ms_tmp/"
    METADATA
      "wcs_label" "GMap WCS Demo Server"                    
      "wcs_onlineresource" "http://localhost:80/cgi-bin/mapserv.exe?" 
      "wcs_enable_request" "*"                          
    END
  END

  LAYER
    NAME gebco
    METADATA
      "wcs_label" "gebco_blue"
      "wcs_rangeset_name" "Range 1"
      "wcs_rangeset_label" "My Label"
    END
    TYPE RASTER
    STATUS ON
    DATA gebco.tif
    PROJECTION
      "init=epsg:4326"
    END
  END
END

Checking the ms_error.txt for errors, it reports the following when accessing the service using QGIS:

[Wed Feb 26 11:41:55 2014].129000 CGI Request 1 on process 4936
[Wed Feb 26 11:41:55 2014].129000 msWCSParseRequest20(): WCS server error. Parameter
'Version' is already set.
[Wed Feb 26 11:41:55 2014].129000 msWCSDispatch20(): Parse error occurred.
[Wed Feb 26 11:41:55 2014].209000 CGI Request 1 on process 1900
[Wed Feb 26 11:41:55 2014].209000 msWCSDispatch20(): version and service are not
compliant with WCS 2.0.0
[Wed Feb 26 11:41:55 2014].209000 msWCSParseRequest(): request is KVP.

And when trying to add the layer to the map (QGIS):

[Wed Feb 26 11:54:05 2014].220000 CGI Request 1 on process 4472
[Wed Feb 26 11:54:05 2014].220000 msWCSParseRequest20(): WCS server error. Parameter
'Version' is already set.
[Wed Feb 26 11:54:05 2014].220000 msWCSDispatch20(): Parse error occurred.
[Wed Feb 26 11:54:08 2014].904000 CGI Request 1 on process 5892
[Wed Feb 26 11:54:08 2014].904000 msWCSParseRequest20(): WCS server error. Parameter
'Version' is already set.
[Wed Feb 26 11:54:08 2014].904000 msWCSDispatch20(): Parse error occurred.
[Wed Feb 26 11:54:08 2014].994000 CGI Request 1 on process 6072
[Wed Feb 26 11:54:08 2014].994000 msWCSDispatch20(): version and service are not
compliant with WCS 2.0.0
[Wed Feb 26 11:54:08 2014].994000 msWCSParseRequest(): request is KVP.
[Wed Feb 26 11:54:09 2014].84000 CGI Request 1 on process 5944
[Wed Feb 26 11:54:09 2014].84000 msWCSParseRequest20(): WCS server error. Parameter
'Version' is already set.
[Wed Feb 26 11:54:09 2014].84000 msWCSDispatch20(): Parse error occurred.

Now, when connecting the service via ArcGIS:

[Wed Feb 26 11:57:32 2014].802000 CGI Request 1 on process 5832
[Wed Feb 26 11:57:32 2014].802000 msWCSDispatch20(): version and service are not
compliant with WCS 2.0.0
[Wed Feb 26 11:57:32 2014].802000 msWCSParseRequest(): request is KVP.
[Wed Feb 26 11:57:32 2014].822000 Format 'png24' ignored since mimetype 'image/png'
duplicates another outputFormatObj.
[Wed Feb 26 11:57:32 2014].822000 Format 'GTiff' ignored since mimetype 'image/tiff'
duplicates another outputFormatObj.
[Wed Feb 26 11:57:32 2014].932000 CGI Request 1 on process 3540
[Wed Feb 26 11:57:32 2014].932000 msWCSDispatch20(): version and service are not
compliant with WCS 2.0.0
[Wed Feb 26 11:57:32 2014].932000 msWCSParseRequest(): request is KVP.
[Wed Feb 26 11:57:32 2014].932000 msWCSParseRequest(): Whole String: gebco
[Wed Feb 26 11:57:32 2014].932000 msLoadProjectionString(): Projection library error.
Unrecognised OGC CRS def 'urn:ogc:def:crs:OGC::imageCRS'.

And finally, when trying to display the image in ArcGIS:

[Wed Feb 26 12:00:57 2014].16000 CGI Request 1 on process 4632
[Wed Feb 26 12:00:57 2014].16000 msWCSDispatch20(): version and service are not
compliant with WCS 2.0.0
[Wed Feb 26 12:00:57 2014].16000 msWCSParseRequest(): request is KVP.
[Wed Feb 26 12:00:57 2014].16000 msWCSParseRequest(): Whole String: gebco
[Wed Feb 26 12:00:57 2014].16000 msLoadProjectionString(): Projection library error.
Unrecognised OGC CRS def 'urn:ogc:def:crs:OGC::imageCRS'.
[Wed Feb 26 12:00:58 2014].166000 CGI Request 1 on process 4440
[Wed Feb 26 12:00:58 2014].166000 msWCSDispatch20(): version and service are not
compliant with WCS 2.0.0
[Wed Feb 26 12:00:58 2014].166000 msWCSParseRequest(): request is KVP.
[Wed Feb 26 12:00:58 2014].166000 msWCSParseRequest(): Whole String: gebco
[Wed Feb 26 12:00:58 2014].166000 msWCSGetCoverageBands11(): WCS server error.
RangeSubset field name malformed, expected 'Range 1', got RangeSubset=Range

So, there are many things to have a look at, and obviously the errors in the ms_error.txt file gives us a clue, how to solve them?. But for instance, why it says:

version and service are not compliant with WCS 2.0.0?

When I am using VERSION=1.0.0 in the requests?

Answer 1

It seems that the WCS support is not fully working in QGIS 2.2 yet. In the meanwhile, in order to test your WCS service in QGIS, you can write a GDAL WCS driver (e.g. CoverageName.xml) and then load it as a raster layer. It should be something like the following (requesting version 1.0.0):

<WCS_GDAL>
  <ServiceURL>http://localhost:80/cgi-bin/mapserv.exe?map=MYMAPFILE.map&</ServiceURL>
  <CoverageName>name</CoverageName>
  <Version>1.0.0</Version>
</WCS_GDAL>

Otherwise, there are other WCS clients that work with version 1.0.0, like gvSIG. Hope this helps.

---

EDIT

Following the Output Formats examples for WCS Server Mapfile on the MapServer site, I'd try to refine the OUTPUTFORMAT in this way, because the MIMETYPE is missing:

OUTPUTFORMAT
  NAME GEOTIFF_16
  DRIVER "GDAL/GTiff"
  MIMETYPE "image/tiff"
  IMAGEMODE INT16
  EXTENSION "tif"
END

And, above all, change the value of the "wcs_onlineresource" WEB metadata because is recommended (change accordingly to your configuration):

"wcs_onlineresource"  "http://127.0.0.1/cgi-bin/mapserv.exe?" ### recommended

Answer 2

WCS client may read the GetCapabilities response and use the GetCoverage address that is announced there. You mapfile is configured as

 "wcs_onlineresource" "http://localhost:80/cgi-bin/mapserv.exe?" while correctly it is
  "wcs_onlineresource" "http://localhost:80/cgi-bin/mapserv.exe?map=/ms4w/apps/raster.map"

You seem to have typo in GDAL XML ...?map=/ms4w/app/raster.map... but you may also need to use url-encoding or xml-encoding inside the GDAL config file.