[OpenLayers-Dev] Ordnance Survey OpenSpace using OpenLayers

[Rosario Carbone]

Christopher Schmidt-4 wrote:
>> 
>> Anyway it would be great if all the adding done by OpenSpace would be

>> supported by OL already. I tried to read some Ordnance Survey GML
with 
>> OL GML layers and I failed I think because OS developed an extra 
>> layers of the OGC standard GML schemas which I don't think is 
>> supported by OL, right?

> Doubtful. I'd be interested in seeing any GML that the convert-data
demo above can't handle posted to the mailing list.

Hi
I don't know if I explained well what I was doing regarding the Ordnance
Survey's GML. It is not easy to get some test GML from OS, I found some
on the web somewhere, I don't remember where. I am attaching you a copy,
I don't know if it is a valid one but I suspect so.
I cannot parse the file with GMLParser.html and I also cannot see
anything with gml-layer.html in your examples. I haven't been into the
details of your parser but I suspect this format is not handled.

I think the reason is that the OS'gml is not properly OGC compliant. I
think the problem might have something to do with the schema files.
Their XML schemas chain is: W3C x... Namespace, the next schema in the
chain are in the Open Geospatial gml namespace and the final schema in
the chain are in the Ordnance Survey osgb namespace. 

[http://www.ordnancesurvey.co.uk/oswebsite/xml/schema/index.html].

In order to use the 'localised' schema files you will probably need to
change the path for the location of the OSDNFFeatures.xsd in the GML
file header. For example, if the attached schema files were saved in
"c:/temp/new_schemas" the xsi:schemaLocation would be changed from
xsi:schemaLocation='http://www.ordnancesurvey.co.uk/xml/namespaces/osgb
http://www.ordnancesurvey.co.uk/xml/schema/v4/OSDNFFeatures.xsd' to
xsi:schemaLocation='http://www.ordnancesurvey.co.uk/xml/namespaces/osgb
c:/temp/new_schemas/OSDNFFeatures.xsd'.

Kind Regards
Rosario


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