[mapserver-users] mapserver-users Digest, Vol 104, Issue 3

[Berger, Cora]

Hello Jeff,
thanks for your help. It seems that QGIS requests the WCS in its full extent. The size of the data I'm using is quite big. That's why I'm using a Tileindex. When the whole Extent gets requested it comes to a timeout. 
QGIS send these 3 Requests to the Server. 

http://vbrk21nt15.bezreg-koeln.nrw.de/wms/wcs_nw_dgm?SERVICE=WCS&VERSION=1.0.0&REQUEST=GetCoverage&FORMAT=GTiff&COVERAGE=nw_dgm&BBOX=278000,5560000,536000,5828000&CRS=EPSG:25832&RESPONSE_CRS=EPSG:25832&WIDTH=10&HEIGHT=10

http://vbrk21nt15.bezreg-koeln.nrw.de/wms/wcs_nw_dgm?SERVICE=WCS&VERSION=1.0.0&REQUEST=GetCoverage&FORMAT=GTiff&COVERAGE=nw_dgm&BBOX=406613,5693799,407387,5694201&CRS=EPSG:25832&RESPONSE_CRS=EPSG:25832&WIDTH=6&HEIGHT=3

http://vbrk21nt15.bezreg-koeln.nrw.de/wms/wcs_nw_dgm?SERVICE=WCS&VERSION=1.0.0&REQUEST=GetCoverage&FORMAT=GTiff&COVERAGE=nw_dgm&BBOX=327278,5724552,331535,5729242&CRS=EPSG:25832&RESPONSE_CRS=EPSG:25832&WIDTH=33&HEIGHT=35

The first BBOX is the extent defined in the mapfile. I tried different WCs and the first GetCoverage request always requests the whole extent with width and height = 10.  
So I guess my only chance is to reduce my data volume...

Yours
Cora


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>Von: mapserver-users [mailto:mapserver-users-bounces at lists.osgeo.org] Im
>Auftrag von mapserver-users-request at lists.osgeo.org
>Gesendet: Samstag, 3. September 2016 21:00
>An: mapserver-users at lists.osgeo.org
>Betreff: mapserver-users Digest, Vol 104, Issue 3
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>Today's Topics:
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>   1. Re: WCS with elevation data (Jeff McKenna)
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>----------------------------------------------------------------------
>
>Message: 1
>Date: Sat, 3 Sep 2016 15:28:05 -0300
>From: Jeff McKenna <jmckenna at gatewaygeomatics.com>
>To: mapserver-users at lists.osgeo.org
>Subject: Re: [mapserver-users] WCS with elevation data
>Message-ID:
>	<a5194b85-d863-7593-d70f-fc0ed8905773 at gatewaygeomatics.com>
>Content-Type: text/plain; charset=utf-8; format=flowed
>
>Hi Cora,
>
>I believe QGIS defaults to using VERSION=1.0.0 for WCS.
>
>A nice way to see the exact OGC request sent by QGIS, is to use Fiddler:
>
>  - download and install Fiddler (Google will help you find its current
>download)
>  - open it and leave it running
>  - in QGIS goto /Settings/Options/Network
>  - click on "Use proxy for web access"
>  - for Proxy Type select "HttpProxy"
>  - for Host enter: 127.0.0.1
>  - for Port enter: 8888
>  - presss "ok" button
>  - now Add a WCS layer in QGIS again, but watch the Fiddler window
>  - click on the GetCoverage request in Fiddler
>  - to see the full requested url in Fiddler, check the 'Inspector' tab,
>and then select 'Raw'
>
>This is a handy trick especially when debugging MapServer services.
>(beware that QGIS caches the service though, see previous warnings by me
>on this list for that).
>
>Have a nice weekend,
>
>-jeff
>
>
>
>--
>Jeff McKenna
>MapServer Consulting and Training Services
>http://www.gatewaygeomatics.com/
>
>
>
>
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