Puneet, As far as I know, OpenLayers still has support for a layer based on MapServer CGI. Because MapServer can also serve up WMS well, this layer type isn't necessarily recommended or as well supported.
http://dev.openlayers.org/docs/files/OpenLayers/Layer/MapServer-js.html David. -----Original Message----- From: mapserver-users-boun...@lists.osgeo.org [mailto:mapserver-users-boun...@lists.osgeo.org] On Behalf Of Mr. Puneet Kishor Sent: Thursday, September 08, 2011 9:32 PM To: Daniel Morissette Cc: mapserver-users@lists.osgeo.org Subject: Re: [mapserver-users] MapScript WMS request On Sep 8, 2011, at 8:28 PM, Daniel Morissette wrote: > On 11-09-08 09:02 PM, Mr. Puneet Kishor wrote: >> >> On Sep 8, 2011, at 7:43 PM, Daniel Morissette wrote: >>> >>> Maybe call $map->save("/tmp/my.map") in your script after the map and layer >>> have been populated and paste the result... that may give us a hint... >>> >> >> wow! this is a super-awesome debugging technique. I have sent you the map >> file off list to not pollute the entire list serve. >> > > I was able to reproduce the issue with the copy of the mapfile you sent > off-list. > > It turns out that mappostgis.c's msPostGISLayerGetExtent() is hardcoded to > always return > > {minx = -25000000, miny = -25000000, maxx = 25000000, maxy = 25000000} > > ...and then it returns MS_SUCCESS. > > I think this function should either be left unimplemented (this way MapServer > would fallback on other mechanisms), or return MS_FAILURE to indicate to the > calling code that it didn't do anything useful. > > A quick search indicates an open ticket about the issue: > > http://trac.osgeo.org/mapserver/ticket/3585 > > You could bump the ticket and hope someone works on it at the FOSS4G code > sprint next week. > > The short term fix for you would be to set the "ows_extent" metadata in your > layer: > > METADATA > "ows_extent" "-180 -90 180 90" > ... > END > Thanks Daniel. I will bump the ticket. For now, see below -- Using the "my.map" file I sent you, with no further modifications to it, I am able to successfully get an image back via [http://localhost.local/cgi-bin/gmna?SERVICE=WMS&VERSION=1.1.1&REQUEST=GetMap&BBOX=-180,-90,180,90&SRS=EPSG:4326&WIDTH=1200&HEIGHT=600&LAYERS=gmna&STYLES=&FORMAT=image/png&TRANSPARENT=true] Note, no further modifications is required, that is, not even the "ows_extent" "-180 -90 180 90" bit in the layer METADATA. and I still get a good image. However, if I use the following program to access the same map file, I get the spurious "minx = -25000000, miny = -25000000, maxx = 25000000, maxy = 25000000" in the GetCapabilities. Finally, if I add the "ows_extent" "-180 -90 180 90" line in the layer METADATA in the "my.map" file, the GetCapabilities returns the correct bounds now, however, the image is still blank. #!/opt/local/bin/perl use strict; use mapscript; my $wms = new mapscript::OWSRequest(); $wms->setParameter("SERVICE", "WMS" ); $wms->setParameter("VERSION", "1.1.1" ); $wms->setParameter("REQUEST", "GetMap" ); $wms->setParameter("BBOX", "-180,-90,180,90" ); $wms->setParameter("LAYERS", "gmna"); $wms->setParameter("SRS", "EPSG:4326"); $wms->setParameter("WIDTH", "1200"); $wms->setParameter("HEIGHT", "600"); $wms->setParameter("FORMAT", "image/png"); $wms->setParameter("TRANSPARENT", "true"); my $map = new mapscript::mapObj("/Users/punkish/Sites/test/mapscript/my.map"); if(!$map) { warn "New mapObj() error: $mapscript::ms_error->{message}\n"; } my $io = mapscript::msIO_installStdoutToBuffer(); my $dispatch_out = $map->OWSDispatch( $wms ); printf "%s\n", mapscript::msIO_getStdoutBufferString(); I have now spent an enormous amount of time on this, and for now, I have to move on. This is just not working out. Maybe I will try some other technique, perhaps this mode=tile to see if I can get MapServer powered maps in my apps. Thanks much for your help. If you (or anyone else) can come up with a bright idea, I will be happy to try it. Puneet. _______________________________________________ mapserver-users mailing list mapserver-users@lists.osgeo.org http://lists.osgeo.org/mailman/listinfo/mapserver-users _______________________________________________ mapserver-users mailing list mapserver-users@lists.osgeo.org http://lists.osgeo.org/mailman/listinfo/mapserver-users
