[QGIS-trac] Re: [Quantum GIS] #1176: Transverse mercator south orientated projections not supported

[Quantum GIS]

#1176: Transverse mercator south orientated projections not supported
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        Reporter:  halfhaggis                        |         Owner:  homann          
            Type:  bug                               |        Status:  new             
        Priority:  major: does not work as expected  |     Milestone:  Version 1.4.0   
       Component:  Projection Support                |       Version:  HEAD            
      Resolution:                                    |      Keywords:  Hartebeeshoek Lo
Platform_version:                                    |      Platform:  All             
        Must_fix:  Yes                               |   Status_info:  0               
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Changes (by garyrsa):

  * keywords:  => Hartebeeshoek Lo
  * platform:  Debian => All

Comment:

 Replying to [comment:10 halfhaggis]:
 > I'm not sure what the right approach to fixing this in qgis is, but
 using the command-line tools cs2cs and proj, I get the correct results for
 the projections with the -m flag. As warmerdam suggests, it appears that
 axis orientation control would solve this.
 >
 > I came to this conclusion after extensive experimentation and discussion
 with Gerald Evenden via the proj4 mailing list.
 >
 > This [http://lists.maptools.org/pipermail/proj/2008-August/003608.html
 post] and this [http://lists.maptools.org/pipermail/proj/2008-
 August/003620.html post] seem most relevant.

 The following proj definition would also sort the problem.In fact it works
 with the test option in "customs srs". But once stored as a custom srs it
 provides the wrong signs (negative)
 +proj=tmerc +ellps=WGS84 +lon_0=19 +to_meter=-1.

 While axis control would be the ideal solution a simple but adequate fix
 would be to allow the -1 in the m or to-meter parameters. Or am I missing
 something?

-- 
Ticket URL: <https://trac.osgeo.org/qgis/ticket/1176#comment:11>
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