Hi David,<br><br>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 :<br><br><a href="http://trac.osgeo.org/mapserver/ticket/4079">http://trac.osgeo.org/mapserver/ticket/4079</a><br>
<br>You will need an OSGeo login but, don't worry, it is easy to create one.<br><br><br><br>Guillaume Loiselle<br><br><div class="gmail_quote">2011/11/24 David Hildebrand <span dir="ltr"><<a href="mailto:David.Hildebrand@afsc.ca">David.Hildebrand@afsc.ca</a>></span><br>
<blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex;">Jukka:<br>
<br>
I am running MapServer 5.2.1 and am being explicit about W** version.<br>
For WMS I am using version 1.1.1 and WCS version 1.0.0 but that is<br>
hidden in a CGI wrapper. I did find out, however, that in my WCS<br>
request I need to specify the RESX and RESY units the same as the CRS<br>
projection units (in this case degrees) and I also need to specify the<br>
RESPONSE_CRS the same as the CRS. These are odd behaviours. One should<br>
be able to request the response in a different projection than the<br>
bounding box and specify the resolution in the units of the output<br>
projection. The projections I am using are all specified in the<br>
"ows_srs" line of the mapserv.map file.<br>
<div class="im"><br>
<br>
<br>
===========================<br>
David V. Hildebrand<br>
Agriculture Financial Services Corporation<br>
<a href="tel:%28403%29%20782-8239" value="+14037828239">(403) 782-8239</a><br>
</div><div><div></div><div class="h5">-----Original Message-----<br>
From: Rahkonen Jukka [mailto:<a href="mailto:Jukka.Rahkonen@mmmtike.fi">Jukka.Rahkonen@mmmtike.fi</a>]<br>
Sent: Thursday, November 24, 2011 2:06 PM<br>
To: David Hildebrand; <a href="mailto:mapserver-users@lists.osgeo.org">mapserver-users@lists.osgeo.org</a><br>
Subject: Re: WCS GetCoverage<br>
<br>
Hi,<br>
<br>
Very first thing to do with all the W** services is to give always an<br>
explicit VERSION=<br>
Request can sometimes work even without but then the default is the<br>
highest supported. Do not play with defaults, take the control for<br>
yourself.<br>
What Mapserver version you have? Perhaps some old 5.x which supports<br>
only WCS 1.0 because otherwise I suppose you would get some other error<br>
message with your request.<br>
<br>
-Jukka Rahkonen-<br>
<br>
________________________________<br>
David Hildebrand wrote:<br>
<br>
I am trying to implement a WCS server and am running into difficulty<br>
with GetCoverage and the following request.<br>
<br>
REQUEST=GetCoverage&COVERAGE=awifs&CRS=EPSG:4269&BBOX=-116,51,-114,53&RE<br>
SX=100&RESY=100&FORMAT=GTiff&RESPONSE_CRS=EPSG:4269<br>
<br>
The following ServiceException is raised.<br>
<br>
msImageCreateGD(): Image handling error. Cannot create GD image of size<br>
0x0<br>
<br>
I can do a WCS GetCapabilities and DescribeCoverage without error.<br>
Also, when I issue the following WMS request it works fine.<br>
<br>
REQUEST=GetMap&LAYERS=awifs&SRS=EPSG:4269&BBOX=-116,51,-114,53&WIDTH=800<br>
&HEIGHT=600&FORMAT=image/png&STYLES=<br>
<br>
The GetCoverage and GetMap requests have the same parameters and yet WCS<br>
thinks the image size is 0x0. The MapServer configuration for the layer<br>
file is given below<br>
<br>
LAYER<br>
NAME "awifs"<br>
PROCESSING "BANDS=2,1,3"<br>
PROCESSING "SCALE_2=19,159"<br>
PROCESSING "SCALE_1=10,130"<br>
PROCESSING "SCALE_3=9,124"<br>
METADATA<br>
"wcs_label" "awifs"<br>
"wcs_rangeset_name" "RGB"<br>
"wcs_rangeset_label" "rgb"<br>
"wms_title" "awifs"<br>
"wms_opaque" "1"<br>
"ows_resolution" "56 56"<br>
"wms_srs" "EPSG:43001"<br>
END<br>
STATUS off<br>
TYPE raster<br>
DATA "e:/awifs/July.tif"<br>
PROJECTION<br>
"init=epsg:43001"<br>
END<br>
TEMPLATE "empty.html"<br>
DUMP TRUE<br>
END<br>
<br>
Thanks for the help.<br>
<br>
<br>
===========================<br>
David V. Hildebrand<br>
Agriculture Financial Services Corporation<br>
<a href="tel:%28403%29%20782-8239" value="+14037828239">(403) 782-8239</a><br>
________________________________<br>
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</div></div></blockquote></div><br>