[Proj] map coordinates in different coordinate system

OvV_HN ovv at hetnet.nl
Thu Jul 9 11:22:30 EST 2009

Seems to me that EPSG:2054 is the Lon_0 = 31d Hartebeesthoek_1994 Transverse 
Mercator projection.
This has a south-west orientation.
Haven't I read somewhere that you can put a minus sign in front of the k_0 
in (lib)proj to get the axes in south-west orientation?

Oscar van Vlijmen

----- Original Message ----- 
From: "stretch" <andrew.deklerk at gmail.com>
To: <proj at lists.maptools.org>
Sent: Wednesday, July 08, 2009 8:46 PM
Subject: Re: [Proj] map coordinates in different coordinate system

> Frank Warmerdam wrote:
>> I am not sure why you say that EPSG:2054 is not a standard. It is a 
>> normal
>> part of the EPSG database. However, it uses the projection method
>> Transverse Mercator South Orientated.  The normal software used to
>> translate
>> the EPSG database to a PROJ.4 dictionary does not handle this projection
>> method since I'm uncertain if it is plain transverse mercator, or if 
>> there
>> is also an implicit change in direction of the Y values (to southings
>> instead of northings).


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