[OSGeo Africa] Kathu coordinate system

[Peter Newmarch]

It is in all likelihood a local system. I don't work in that region so I 
don't know this system.

If its a property diagram, then the local land surveyor will be able to 
tell you the details of that system (probably based on some church spire 
or other reference point as origin).

The coordinates are not really important to us as Land Surveyors and 
hold little importance . If you don't come right, let me know and I will 
make some enquiries for you.

Regards
Peter

Peter Newmarch
Professional Land Surveyor
4Y GeoInformatics Pty Ltd
Tel       : +27 31 5642856
Fax       : +27 31 5643074
Mobile    : +27 82 5705859
eMail     : newmarch at land-surveyors.com

On 2014/01/30 06:30 PM, Zoltan Szecsei wrote:
> Hi,
> Kathu is a mining area, so there is a distinct possibility (for the 
> less informed, aka: me) that this is a local coordinate system used by 
> mine surveyors (in the area).
> I have blind copied a surveyor friend of mine on this response, and 
> hopefully he knows someone who might have worked in the area, and get 
> some info for you.
> In the meantime research kathu+survey+system
>
> Regards,
> Zoltan
>
>
>
> On 30/01/2014 15:00, Walter Smit wrote:
>> I agree with Gavin...since it is from a surveyor and from pre-1999...
>>
>> -----Original Message-----
>> From: africa-bounces at lists.osgeo.org 
>> [mailto:africa-bounces at lists.osgeo.org]
>> On Behalf Of Gavin Fleming
>> Sent: 30 January 2014 02:18 PM
>> To: africa at lists.osgeo.org
>> Subject: Re: [OSGeo Africa] Kathu coordinate system
>>
>> 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
>>> _______________________________________________
>>> Africa mailing list
>>> Africa at lists.osgeo.org
>>> http://lists.osgeo.org/mailman/listinfo/africa
>>
>> -- 
>> regards
>>
>> Gavin
>>
>> Gavin Fleming
>> http://afrispatial.co.za
>> t: 0218630660
>> c: 0845965680
>> f: 0866164820
>>
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