[gdal-dev] GDAL WMS questions...

[Frank Warmerdam]

Carl,

Travis seems to have the right idea. The code is at:

  http://trac.osgeo.org/gdal/browser/trunk/gdal/frmts/wms/minidriver_wms.cpp#L74

The comment is:

  SRS is WMS version 1.1 and earlier, if SRS is not set use default
unless CRS is set
  CRS is WMS version 1.3, if CRS is not set use default unless SRS is set

Best regards,

On Wed, Jan 30, 2013 at 12:19 PM, Travis Kirstine
<traviskirstine at gmail.com> wrote:
> My guess is that SRS is used when connecting to a WMS Version <= 1.1.1 and
> CRS is used when connection to 1.3
>
> Regards
>
>
> On 30 January 2013 15:03, Carl Godkin <cgodkin at gmail.com> wrote:
>>
>>
>> Hi,
>>
>> I'm working with GDAL_WMS in 1.9.2 and have two questions.
>>
>> 1. Coordinate system
>>
>> The documentation on http://gdal.org/frmt_wms.html lists both <SRS>/<CRS>
>> inside the <Service> element as well as <Projection> inside the root
>> element, <GDAL_WMS>.
>>
>> What's the difference?  Both are defined simply as "Image projection."  Is
>> there further information somewhere besides this page?
>>
>> 2. Tiles
>>
>> I don't understand why or when I'd use a tiled vs. untiled request.  If
>> I'm interested in a JPEG or PNG from a particular server covering a
>> particular area in a particular coordinate system, why would I choose one
>> over the other?  Again, if this is explained elsewhere in the documentation,
>> please point me there.
>>
>> Thanks very much,
>>
>> carl
>>
>>
>>
>>
>>
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>
>
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