[mapserver-users] RE: WCS GetCoverage

[Guillaume Loiselle]

Hi David,

I encounter an issue a few weeks ago that shares similarities with your. I
opened a ticket on the subject and I invite you to add any information you
judge relevant :

http://trac.osgeo.org/mapserver/ticket/4079

You will need an OSGeo login but, don't worry, it is easy to create one.



Guillaume Loiselle

2011/11/24 David Hildebrand <David.Hildebrand at afsc.ca>

> Jukka:
>
> I am running MapServer 5.2.1 and am being explicit about W** version.
> For WMS I am using version 1.1.1 and WCS version 1.0.0 but that is
> hidden in a CGI wrapper.  I did find out, however, that in my WCS
> request I need to specify the RESX and RESY units the same as the CRS
> projection units (in this case degrees) and I also need to specify the
> RESPONSE_CRS the same as the CRS.  These are odd behaviours.  One should
> be able to request the response in a different projection than the
> bounding box and specify the resolution in the units of the output
> projection.  The projections I am using are all specified in the
> "ows_srs" line of the mapserv.map file.
>
>
>
> ===========================
> David V. Hildebrand
> Agriculture Financial Services Corporation
> (403) 782-8239
> -----Original Message-----
> From: Rahkonen Jukka [mailto:Jukka.Rahkonen at mmmtike.fi]
> Sent: Thursday, November 24, 2011 2:06 PM
> To: David Hildebrand; mapserver-users at lists.osgeo.org
> Subject: Re: WCS GetCoverage
>
> 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-
>
> ________________________________
> 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&RE
> SX=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.
>
>
> ===========================
> David V. Hildebrand
> Agriculture Financial Services Corporation
> (403) 782-8239
> ________________________________
>
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