[OSGeo Africa] Kathu coordinate system

Gavin Fleming gavin at afrispatial.co.za
Thu Jan 30 04:17:40 PST 2014

Looks like it's south-oriented transverse mercator with a central 
meridian of 23 and an offset of some nice round number > 3000000 on the 
SO x axis (or a local reference latitude) and it would likely be on the 
Cape datum. A bit of playing around these parameters will hopefully 
position it right.

Does searching on the khathu system not turn up anything?

On 30/01/2014 13:56, Hanlie Pretorius wrote:
> Hi,
> I a hand-drawn survey diagram that I need to reproduce in QGIS. The
> area is in the Northen Cape, close to the 23° E longitude.
> The diagram was done in 1968 and its coordinate system is specified as
> 'Kathu System'. The y coordinates are given first, are all positive
> and they range from about 23 000 to 49 000. The x coordinates are
> given second and they range from +31 000 to -153 000.
> Can anyone tell me what the specifications for this coordinate system
> would be? I.e. the information I would need to create a WKT or proj4
> specification for the CRS.
> Thanks
> Hanlie
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Gavin Fleming
t: 0218630660
c: 0845965680
f: 0866164820

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