[gdal-dev] ogrinfo and gml?

[Mateusz Loskot]

Mateusz Loskot wrote:
> Christopher Schmidt wrote:
>> On Fri, Jul 25, 2008 at 12:37:38PM +0200, Mateusz Loskot wrote:
>>> Wendell Turner wrote:
>>>> Why do the examples of ogrinfo not work? That is, the
>>>> example shows a coal_dep.gml with contents of:
>>>>
>>>> <gml:featureMember>
>>>> <Coal_Deposits fid="1">
>>>> <UNKNOWN>0.000</UNKNOWN>
>>>> <NA>0.000</NA>
>>>> <ID>2</ID>
>>>> <ID2>2</ID2>
>>>> <MARK>7</MARK>
>>>> <COALKEY>110</COALKEY>
>>>> <COALKEY2>110</COALKEY2>
>>>> <ogr:geometryProperty>
>>>> <gml:Point>
>>>> <gml:coordinates>78.531,50.694</gml:coordinates>
>>>> </gml:Point>
>>>> </ogr:geometryProperty>
>>>> </Coal_Deposits>
>>>> </gml:featureMember>
>>>>
>>>> Yet ogrinfo doesn't recognize it:
>>>>   > ogrinfo coal_dep.gml   FAILURE:
>>>>   Unable to open datasource `coal_dep.gml' with the following drivers.
>>>>   ...
>>>>   -> GML
>>>>
>>>> This seems to indicate that the GML driver is compiled into
>>>> ogrinfo, but the file is not recognized.  Why is that?
>>>>
>>>> There are no projection associated with the gml file, so are
>>>> the coordinates in whatever the layer projection coordinates
>>>> are?
>>>>
>>>> The example is off of the page:
>>>>   http://mapserver.gis.umn.edu/docs/reference/vector_data/gml
>>> Wendel,
>>>
>>> The document you pasted is incomplete.
>>> For instance, XML prolog is missing there.
>>> Add this as the first line:
>>>
>>> <?xml version='1.0' encoding="UTF-8" ?>
>>
>> XML Prologs are not required in XML, and I have no reason to believe
>> they are required by OGR.
>>
>> The problem seems more likely to be the fact that this is a standalone
>> gml:featureMember without a collection: in general, this would be
>> wrapped inside something like a wfs:featureCollection or something
>> similar...
> 
> Yes, I agree the prolog is optional, but GML driver expects to find
> target namespace in the root element.

Forgot to include this:

http://trac.osgeo.org/gdal/browser/trunk/gdal/ogr/ogrsf_frmts/gml/ogrgmldatasource.cpp#L159


Ciao
-- 
Mateusz Loskot, http://mateusz.loskot.net
Charter Member of OSGeo, http://osgeo.org