[mapserver-users] MapServer 6.0.1 ignoring WMS options?

[Smith, Michael ERDC-CRREL-NH]

David,

You aren't making a WMS request. You are making a MapServer request. When making a map server request, you use mapext=minx+miny+maxx+maxy&mode=map

With WMS, you'd request  SERVICE=WMS&REQUEST=GETMAP&BBOX=minx,miny,maxx,maxy. Note there is no mode=map

See http://mapserver.org/ogc/wms_server.html for details on a proper WMS request.

Mike

From: David Miller <teknocreator at gmail.com<mailto:teknocreator at gmail.com>>
Date: Mon, 5 Mar 2012 15:20:43 -0500
To: <mapserver-users at lists.osgeo.org<mailto:mapserver-users at lists.osgeo.org>>
Subject: [mapserver-users] MapServer 6.0.1 ignoring WMS options?

Hi list!

We have MapServer 6.0.1 installed on our Linux system (CentOS 5.7) and have encountered an issue where the WMS options (i.e. BBOX, HEIGHT, WIDTH) seem to be ignored for a GetMap request.  I have checked options for and output from running the configure script for building the executable.  The --with-proj and --with-wms options are specified (though one shouldn't need it if --with-proj is there correctly).  Output from running the configure script indicates that the -DUSE_WMS_SVR compiler switch was on when compiling the mapwms.c code, which is where that becomes important.  I examined that code and it's here that MapServer first uses the extents in the mapfile as defaults but then adjusts that based on the BBOX, HEIGHT, and WIDTH options in the GetMap request.  Running -v on the resulting executable also indicates SUPPORTS=WMS_SERVER.

The call to MapServer does produce an image but for the entire EXTENT of the data that's specified in the mapfile.  Doesn't make any difference whether it's a raster or point layer.

Example REQUEST:

http://(our main site address)/cgi-bin/mapserv?REQUEST=GetMap&SERVICE=WMS&VERSION=1.1.1&FORMAT=image%2Fpng&MODE=map&MAP=wxmap%2Fglmpvis.map&LAYERS=mosaic&SRS=EPSG%3A3857&TRANSPARENT=TRUE&STYLES=&BBOX=-13807095.590531%203308267.5857033%20-12241665.251469%204482340.3400001&WIDTH=640&HEIGHT=480

First part of the mapfile:

MAP
   NAME "testgrib"
   IMAGETYPE     PNG
   EXTENT           -14000000 3000000 -7000000 7000000

As you can see, the EXTENT in the mapfile are different than the BBOX values.  When I put the BBOX values in the EXTENT area in the mapfile, the image lines up with the map background as it should.

So for some reason, it appears that something isn't being set correctly to allow our MapServer to accept standard WMS options.  Perhaps somehow, this value of USE_WMS_SVR in mapwms.c isn't getting set correctly?  But, by all the output we've checked, it looks like MapServer gets built correctly and to enable it as a WMS server.

Anyone else with a similar issue or somewhere else we should check for a problem?

Thanks for any help!

Dave M
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