[Mapserver-users] WMS BBOX vs. Actual Bounds

[Paul Spencer]

For the record, I believe that the ability to return a map with 
non-square pixels is one of the few areas (or the only one?) in which 
MapServer DOES NOT comply with the WMS specification and, in fact, 
prevents anyone from seeking WMS compliance certification for MapServer. 
  Note I am not expressing an opinion either way here ;)

Cheers,

Paul

Ian Turton wrote:

> At 08:56 08/01/2004 -0500, Ed McNierney wrote:
> 
>> Ian -
>>
>> I can't agree that this is poor behavior.  MapServer should also be
>> expected to return a map in the PROJECTION requested, which is
>> impossible under your scheme.  In WMS mode the SRS is part of the
>> request and should be respected just as much as the WIDTH, HEIGHT, and
>> BBOX parameters, shouldn't it?
> 
> 
> Indeed - they are all important. However the WMS spec is very specific 
> about how to handle this case and it says you must honour all the 
> parameters. Otherwise people like the origianl poster are left not 
> knowing what they got back.
> 
>> If you want the image "distorted", you're not looking for a map - you're
>> making a picture.  If you can define the distortion in a
>> cartographically accurate way (e.g. a picture), then it is indeed a map;
>> but you can also provide MapServer with the definition of that
>> projection and cause it to "distort" the image the way you want.
> 
> 
> For example, suppose I'm displaying my picture/map on a display with non 
> square pixels?
> 
> Ian
> 
> Ian Turton, Director, Centre for Computational Geography, University of 
> Leeds, Leeds, LS2 9JT
> http://www.geog.leeds.ac.uk/people/i.turton http://www.ccg.leeds.ac.uk 
> http://www.geotools.org
> +44 (0) 113 343 3392 fax: +44 (0) 113 343 3308
> 
> _______________________________________________
> Mapserver-users mailing list
> Mapserver-users at lists.gis.umn.edu
> http://lists.gis.umn.edu/mailman/listinfo/mapserver-users
> 

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|Paul Spencer                           spencer at dmsolutions.ca    |
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