[mapserver-users] Re: WCS GetCoverage

[Rahkonen Jukka]

Hi,

Very first thing to do with all the W** services is to give always an explicit VERSION=
Request can sometimes work even without but then the default is the highest supported.  Do not play with defaults, take the control for yourself.
What Mapserver version you have? Perhaps some old 5.x which supports only WCS 1.0 because otherwise I suppose you would get some other error message with your request.

-Jukka Rahkonen-

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David Hildebrand wrote:

I am trying to implement a WCS server and am running into difficulty with GetCoverage and the following request.

REQUEST=GetCoverage&COVERAGE=awifs&CRS=EPSG:4269&BBOX=-116,51,-114,53&RESX=100&RESY=100&FORMAT=GTiff&RESPONSE_CRS=EPSG:4269

The following ServiceException is raised.

msImageCreateGD(): Image handling error. Cannot create GD image of size 0x0

I can do a WCS GetCapabilities and DescribeCoverage without error.  Also, when I issue the following WMS request it works fine.

REQUEST=GetMap&LAYERS=awifs&SRS=EPSG:4269&BBOX=-116,51,-114,53&WIDTH=800&HEIGHT=600&FORMAT=image/png&STYLES=

The GetCoverage and GetMap requests have the same parameters and yet WCS thinks the image size is 0x0.  The MapServer configuration for the layer file is given below

LAYER
  NAME "awifs"
  PROCESSING "BANDS=2,1,3"
  PROCESSING "SCALE_2=19,159"
  PROCESSING "SCALE_1=10,130"
  PROCESSING "SCALE_3=9,124"
  METADATA
    "wcs_label" "awifs"
    "wcs_rangeset_name" "RGB"
    "wcs_rangeset_label" "rgb"
    "wms_title" "awifs"
    "wms_opaque" "1"
    "ows_resolution" "56 56"
    "wms_srs" "EPSG:43001"
  END
  STATUS off
  TYPE raster
  DATA "e:/awifs/July.tif"
  PROJECTION
    "init=epsg:43001"
  END
  TEMPLATE "empty.html”
  DUMP TRUE
END

Thanks for the help.


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David V. Hildebrand
Agriculture Financial Services Corporation
(403) 782-8239
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