Can I reproject WMS service using cgi parameters?

Ed McNierney ed at TOPOZONE.COM
Thu Jan 18 11:16:55 EST 2007


Tomas -

I have never heard of this and cannot find a reference to it in the WMS
1.1.1 spec at http://www.opengeospatial.org/standards/wms, nor in the new
1.3 spec (not supported by MapServer).  The WMS spec does not say anything
about the internal details of an SRS definition, so there would be no way to
know what to find inside a URL-based reference to a file defining an SRS.

It is very difficult to compare SRS definitions when described
parametrically; there are several ways of saying the same thing, and it¹s
hard to tell whether minor differences are supposed to be differences or
just discrepancies.  That¹s why the use of SRS catalogs is so helpful ­ the
model of namespace:srsname makes it easy to tell whether a requested SRS is
something you can understand or not.

     - Ed

-- 
Ed McNierney
President and Chief Mapmaker
Maps a la carte, Inc. / TopoZone.com
73 Princeton Street, Suite 305
North Chelmsford, MA  01863
Phone: (978) 251-4242
Fax: (978) 251-1396
ed at topozone.com


From: Tomas Novotny <tomas.novotny at TMAPY.CZ>
Reply-To: Tomas Novotny <tomas.novotny at TMAPY.CZ>
Date: Thu, 18 Jan 2007 09:23:47 +0100
To: <MAPSERVER-USERS at LISTS.UMN.EDU>
Subject: Re: [UMN_MAPSERVER-USERS] Can I reproject WMS service using cgi
parameters?

Hi,
it is misunderstanding, I mean this style of SRS parameter value:
"http://my.server.com/path_to_file_with_mySRS_definition"
<http://my.server.com/path_to_file_with_mySRS_definition>

Tomas
Tomas Novotny, tomas.novotny at tmapy.cz
T-MAPY spol. s r.o., Nezvalova 850, 500 03 Hradec Kralove,
Czech Republic, phone: + 420 49 5513335 , fax + 420 49 5513371


Thy, Kristian wrote:
>  
> It does, specify SRS=EPSG:4326 (or whatever SRS you like) in the URL and
> make sure the EPSG code is advertised in the map file's METADATA section
> under the "wms_srs" entry.
> 
> 
> Kristian  
> 
>   
>  
>>  
>> -----Original Message-----
>> From: UMN MapServer Users List
>> [mailto:MAPSERVER-USERS at lists.umn.edu] On Behalf Of Tomas Novotny
>> Sent: 18. januar 2007 07:23
>> To: MAPSERVER-USERS at lists.umn.edu
>> Subject: Re: [UMN_MAPSERVER-USERS] Can I reproject WMS
>> service using cgi parameters?
>> 
>> Hi,
>> 
>> I think WMS spec gives a chance to define SRS by public URL
>> of file with 
>> definition of SRS. I don't know if MapServer supports this.
>> 
>> Tomas
>> 
>> -- 
>> Tomas Novotny, tomas.novotny at tmapy.cz
>> T-MAPY spol. s r.o., Nezvalova 850, 500 03 Hradec Kralove,
>> Czech Republic, phone: + 420 49 5513335 , fax + 420 49 5513371
>> 
>> 
>> This message has been scanned for viruses by MailControl -
>> (see http://bluepages.wsatkins.co.uk/?4318150)
>> 
>>     
>>  
>  
> 
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