[mapguide-users] RE: MapGuide Open 1.0.1 and WMS problems
Thomas M. Tuerke
thomas.m.tuerke at autodesk.com
Fri Aug 11 15:05:31 EDT 2006
Hi Andy,
The *.awd files are cached since -- under normal circumstances -- they're static and they live in a centralized location on the server but are used on the web extension tier (handled by an arbitrary number of boxes in a farm environment.) We felt that minimizing the chit-chat between the two tiers would help performance... at the cost of some expiry issues, which are usually resolved by a (webserver) restart after changing the server's copy of these *.awd files.
While the *.awd files are static, the products they're responsible for returning -- GetCapabilities, GetFeatureInfo, and in general text-based responses -- are in fact "live." Even so, much of this textual response is boilerplate, and that boilerplate lives in the AWD files. Just iterate over the list of published layers or what have you to fill in the blanks, and voila: one Capabilities Document.
Naturally, GetMap isn't a textual response, doesn't have a high degree of boiler-plate, and generally doesn't have much similarity between responses, so it's not worth caching. (It also doesn't rely on much of the *.awd files, so as you noticed, Antonio's service information didn't interfere with your requests... it's just "false advertisement" to whatever humans should happen to read the GetCapabilities response. ;-)
Changing the service properties in Site Administrator should only require one restart of the web servers (Apache or IIS -- not the MapGuide server) since that's where the stuff is cached. If, after using Site Administrator, you see that the *.config.awd file (that is, the actual bits on the server hard disk) hasn't changed then suspect a file writing issue: being marked read-only, or otherwise not having permissions to write to the file. (Linux may be all the more insistent, with a chmod or change of ownership likely.)
Hope that helps. If you do discover the differences, I'd be interested in knowing, too. Thanks!
- Thomas
-----Original Message-----
From: Andy Morsell [mailto:amorsell at spatialgis.com]
Sent: Friday, August 11, 2006 11:40 AM
To: users at mapguide.osgeo.org
Subject: RE: [mapguide-users] RE: MapGuide Open 1.0.1 and WMS problems
Antonio sent me his OgcWmsService.config.awd file, I stopped my services,
copied the file in, restarted services and everything worked. I have
absolutely no idea why and I will take the time to compare his .awd file
with mine later. Could the file have been corrupt on my end from the
beginning after the install?
One thing I noticed is that this file also stores the WMS server information
(which is also displayed via a WMS GetCapabillities request), but WMS GetMap
requests to my server were still working even with Antonio's server
information. I changed this information several times in Admin (restarting
services in between each time), but it seems to not matter to the actual WMS
service and is purely informational.
I'm happy now since my live demo of this stuff works again after a 2 week
hiatus: http://mapguide.spatialgis.com/mapguide/GoogleMapsDemo/
Andy
-----Original Message-----
From: Antonio de la Peña [mailto:antonio_dlp at dsgmexico.com.mx]
Sent: Thursday, August 10, 2006 6:05 PM
To: users at mapguide.osgeo.org
Subject: [mapguide-users] RE: MapGuide Open 1.0.1 and WMS problems
I can't confirm that because I don't have the Sheboygan package installed
right now but I'll attach my awd file. You still have to set up the proper
server address either by hand or using the map administrator so it points to
your WMS server IP or name. Hope it works.
Andy Morsell wrote:
>
> But, it sounds like it working for Antonio after removing the comment
> and not having any additional WKT entries. Antonio, can you confirm
> that this works for you (replace the server with yours)?:
>
> http://mapguide.spatialgis.com/mapguide/mapagent/mapagent.fcgi?request
> =GetMa
> p&service=WMS&layers=Samples/Sheboygan/Layers/Hydrography&srs=EPSG:432
> 6&bbox
> =-87.74,43.68,-87.69,43.815&width=500&height=500&format=image/png
>
> Thanks.
>
> Andy
>
> -----Original Message-----
> From: Thomas M. Tuerke [mailto:thomas.m.tuerke at autodesk.com]
> Sent: Monday, August 07, 2006 3:22 PM
> To: users at mapguide.osgeo.org
> Subject: RE: [mapguide-users] MapGuide Open 1.0.1 and WMS problems
>
> Hi Andy,
>
> No, once you've restarted the IIS or Apache server, the in-memory
> cache should be cleared. (I think FastCGI clears the module -- and
> thus the cache
> -- every several hundred requests or so, too.)
>
> If the WKT isn't coming from the *.config.awd file, then it must be
> coming from the underlying CS system; if that's generating a parser
> error, then Houston, we have a problem (... which SRS.WKT.map was
> meant to address in the first place ;-})
>
> With this stray comment syntax error identified (thanks, Antonio!) how
> about trying to reinstate one of last week's EPSG:4326 mappings to
> WKT, to see if that's more digestible. Either way, an OSGEO artifact
> may be in order.
>
> Thanks,
>
> - Thomas
>
> -----Original Message-----
> From: Andy Morsell [mailto:amorsell at spatialgis.com]
> Sent: Monday, August 07, 2006 3:11 PM
> To: users at mapguide.osgeo.org
> Subject: RE: [mapguide-users] MapGuide Open 1.0.1 and WMS problems
>
> There is no entry for that WKT. I am using the out-of-the-box
> OgcWmsService.config.awd file with the exception of removing the
> errant comment string. I did try to add an entry last week per your
> recommendations, but have reverted to the original file and have
> restarted services, etc. Does that information get stored in another
> configuration location that needs to be edited now?
>
>
> Andy
>
> -----Original Message-----
> From: Thomas M. Tuerke [mailto:thomas.m.tuerke at autodesk.com]
> Sent: Monday, August 07, 2006 2:56 PM
> To: users at mapguide.osgeo.org
> Subject: RE: [mapguide-users] MapGuide Open 1.0.1 and WMS problems
>
> If that WKT is coming from SRS.WKT.map, try removing it from the map
> and seeing what happens.
>
> -----Original Message-----
> From: Andy Morsell [mailto:amorsell at spatialgis.com]
> Sent: Monday, August 07, 2006 2:52 PM
> To: users at mapguide.osgeo.org
> Subject: RE: [mapguide-users] MapGuide Open 1.0.1 and WMS problems
>
> Hi Antonio,
> I checked my file and see the same error (I'm kicking myself, I was
> looking in this location just last week and didn't notice the error).
> However, after fixing it and then trying to generate the test WMS map
> from the Sheboygan hydrography layer, I now get this error:
>
> <ServiceExceptionReport version="1.1.1"> <ServiceException
> code="InvalidCRS">
> The coordinate system is invalid. PROJCS["WGS 84",GEOGCS["WGS
> 84",DATUM["WGS_1984",SPHEROID["WGS
> 84",6378137,298.257223563,AUTHORITY["EPSG","7030"]],AUTHORITY["EPSG","
> 6326"]
> ],PRIMEM["Greenwich",0,AUTHORITY["EPSG","8901"]],UNIT["degree",0.01745
> 329251 994328,AUTHORITY["EPSG","9122"]],AUTHORITY["EPSG","4326"]]"
> Could not parse the OGC WKT.<details>The coordinate system is invalid.
> PROJCS["WGS 84",GEOGCS["WGS 84",DATUM["WGS_1984",SPHEROID["WGS
> 84",6378137,298.257223563,AUTHORITY["EPSG","7030"]],AUTHORITY["EPSG","
> 6326"]
> ],PRIMEM["Greenwich",0,AUTHORITY["EPSG","8901"]],UNIT["degree",0.01745
> 329251 994328,AUTHORITY["EPSG","9122"]],AUTHORITY["EPSG","4326"]]"
> Could not parse the OGC WKT.
> Exception occurred in method MgCoordinateSystem.MgCoordinateSystem at
> line
> 76 in file
> c:\build_tux_area\mgdev_opensource\common\service\coordinatesystem\Coo
> rdinat
> eSystem.cpp
> </details>
> </ServiceException>
> </ServiceExceptionReport>
>
>
> Andy
>
> -----Original Message-----
> From: Antonio de la Peña [mailto:antonio_dlp at dsgmexico.com.mx]
> Sent: Monday, August 07, 2006 2:15 PM
> To: users at mapguide.osgeo.org
> Subject: Re: [mapguide-users] MapGuide Open 1.0.1 and WMS problems
>
>
> Apparently the OgcWmsService.config.awd has a typo in the line 236 (or
> near
> it) where it says:
>
> <!-- This example fixes a problem with EPSG:21781 not -->
> finding the WKT for EPSG:21781 in the CS library.
> -->
>
> As you can see there's an orphan commentary closing tag so I corrected
> it like this:
>
> <!-- This example fixes a problem with EPSG:21781 not
> finding the WKT for EPSG:21781 in the CS library. -->
>
> Then I restarted the server both MapGuide service and IIS and now the
> "coordinate system conversion failed." error is gone.
>
> I added the artifact MG348 addressing this issue.
> --
> View this message in context:
> http://www.nabble.com/MapGuide-Open-1.0.1-and-WMS-problems-tf2025055.h
> tml#a5
> 696004
> Sent from the OSGeo MapGuide forum at Nabble.com.
>
>
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View this message in context:
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