[mapguide-users] RE: WMS Data Source?

[Thomas M. Tuerke]

> What do you mean by ourselves?  Included in the MapGuide installation (local reference)?  Hosted somewhere at OSGeo?

 

Nope, that’s Friday Night Bleary-eyed Syndrome on my part.  I saw “http://schemas.opengis.net/...” but mentally processed “https://schemas.osgeo.org/...” – basically conflating the two domains in your original message.

 

And in light of that realization...

 

> Counting on the persistence of a single external resource in a distributed system doesn't seem like a great idea”

 

 … seems like we’re just trading one culprit for another by going to opengis.net, since it, too, would be that single point of contact.  Hosting it on osgeo.org would be a Good Thing <http://catb.org/jargon/html/G/Good-Thing.html>  for a distributed system, no?  It would certainly take a bit of load off of the OpenGIS servers for what are essentially static documents.

 

Ideally, though, you’re right: the truly robust installation will simply host the DTDs on its own webserver, updating the templates accordingly.  That’s not hard for the site admin to do, either.

 

- Thomas

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From: Jason Birch [mailto:Jason.Birch at nanaimo.ca] 
Sent: Friday, November 03, 2006 6:06 PM
To: users at mapguide.osgeo.org
Subject: RE: [mapguide-users] RE: WMS Data Source?

 

OK, weird choice from the specification pov then.  Counting on the persistence of a single external resource in a distributed system doesn't seem like a great idea.  One change brings the whole thing tumbling down.

 

What do you mean by ourselves?  Included in the MapGuide installation (local reference)?  Hosted somewhere at OSGeo?

 

Jason


 

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From: Thomas M. Tuerke
Sent: Fri 2006-11-03 5:49 PM
To: users at mapguide.osgeo.org
Subject: RE: [mapguide-users] RE: WMS Data Source?

Hi Jason,

 

Just a bit of historical perspective:

 

> … instead of digitalearth (weird choice):

 

Deprecated, perhaps, but not necessarily weird. It’s what the relevant specs call for, and until recently they seemed to work just fine.

 

Fortunately, it looks like we’ve decided to host the DTD files ourselves to eliminate that external dependency.

 

- Thomas

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From: Jason Birch [mailto:Jason.Birch at nanaimo.ca] 
Sent: Friday, November 03, 2006 5:34 PM
To: users at mapguide.osgeo.org
Subject: RE: [mapguide-users] RE: WMS Data Source?

 

This is a known issue:

 

https://mapguide.osgeo.org/servlets/Scarab?id=MG434 <https://mapguide.osgeo.org/servlets/Scarab?id=MG434> 

 

It looks like you may be able to fix it by grabbing the three fixed files from SVN:

 

https://mapguide.osgeo.org/source/browse/mapguide/branches/1.0.x/MgDev/Server/src/Wms/ <https://mapguide.osgeo.org/source/browse/mapguide/branches/1.0.x/MgDev/Server/src/Wms/> 

 

or just updating the AWD templates on your site to hit OGC instead of digitalearth (weird choice):

http://schemas.opengis.net/wms/1.0.0/capabilities_1_0_0.dtd <http://schemas.opengis.net/wms/1.0.0/capabilities_1_0_0.dtd> 
http://schemas.opengis.net/wms/1.1.0/capabilities_1_1_0.dtd <http://schemas.opengis.net/wms/1.1.0/capabilities_1_1_0.dtd> 
 
<http://schemas.opengis.net/wms/1.1.1/capabilities_1_1_1.dtd> http://schemas.opengis.net/wms/1.1.1/capabilities_1_1_1.dtd
 
respectively, for the three templates.
 
I recall something similar with LiteView in MapGuide 6.x, and I think I had to repoint to a local DTD.  Bit fuzzy on that though; I gave up on LiteView pretty quickly.

Jason


 

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From: Andy Morsell
Sent: Fri 2006-11-03 5:12 PM
To: users at mapguide.osgeo.org
Subject: RE: [mapguide-users] RE: WMS Data Source?

There is an OSGeo FDO WMS data provider for this purpose
(https://mapguide.osgeo.org/servlets/ProjectDocumentList?folderID=100&expand
Folder=100&folderID=0).  However, I just tried working with it and there
appears to be a problem today.  If you try to use it to define a data
connection, and then enter a WMS server name and press the Test Connection
button, you will get an error

"An exception occurred in FDO component.
XML Document parse error at line 8 column 3: An exception occurred!
Type:NetAccessorException, Message:The host/address 'www.digitalearth.gov'
could not be resolved "

It appears that the FDO provider is looking up a DTD at digitalearth.gov and
their web site is currently down (at least on my end). 

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