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

[Quantum GIS]

#1176: Transverse mercator south orientated projections not supported
----------------------------------------------------+-----------------------
        Reporter:  halfhaggis                       |         Owner:  nobody       
            Type:  bug                              |        Status:  closed       
        Priority:  minor: annoyance or enhancement  |     Milestone:  Version 1.0.0
       Component:  Projection Support               |       Version:  HEAD         
      Resolution:  invalid                          |      Keywords:               
Platform_version:                                   |      Platform:  Debian       
        Must_fix:  No                               |   Status_info:  0            
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Changes (by timlinux):

  * priority:  major: does not work as expected => minor: annoyance or
               enhancement
  * status:  new => closed
  * resolution:  => invalid

Old description:

> I need to project maps in South Africa, where we use the Hartebeesthoek
> projections. These are based on transverse mercator south orientated.
>
> These projections are not supported, making it impossible for me to carry
> out any measurements etc. This effectively makes the application useless
> in most cases where such projections are needed.
>
> It appears to be related to the fact that proj4 lacks support for south
> orientated projections.
>
> Is there some way around this? Is there a solution using PostGIS,
> perhaps? If so, it should be highlighted for new users, with clear
> instructions on how to implement it.

New description:

 I need to project maps in South Africa, where we use the Hartebeesthoek
 projections. These are based on transverse mercator south orientated.

 These projections are not supported, making it impossible for me to carry
 out any measurements etc. This effectively makes the application useless
 in most cases where such projections are needed.

 It appears to be related to the fact that proj4 lacks support for south
 orientated projections.

 Is there some way around this? Is there a solution using PostGIS, perhaps?
 If so, it should be highlighted for new users, with clear instructions on
 how to implement it.

 Lastly there are quite a number of South orientated coordinate reference
 systems included with the QGIS database and it certainly does support
 them.

 Regards

 Tim

Comment:

 Hi

 You can define custom projection definitions using the tool provided under
 the tools menu. Also your terminology is I think incorrect - Hartebeeshoek
 is a datum describing the spheroid. AFAIK Surveys and Mapping began
 phasing out the use of the Hartebeeshoek datum around 9 years ago, in
 favour of the WGS84 datum.

 Regards

 Tim

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Ticket URL: <https://trac.osgeo.org/qgis/ticket/1176#comment:1>
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