[OSGeo Africa] CRS in use in South Africa

[Charles Rethman]

Dear Zoltan,

I also used AEA with standard parallels at 24 and 33 and the longitude of centre at 25 for national maps (mostly livelihoods zoning) as well. I also used it for working on whole provinces as well, because most provinces don’t fit into the bounds for SACRS or UTM.

Charles.




Charles Rethman

19 Sans Souci Road, Newlands, 7700
rethman at telkomsa.net <mailto:rethman at telkomsa.net> rethman at me.com <mailto:rethman at me.com>
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> On 12 Dec 2017, at 16:08, Zoltan <zoltans at geograph.co.za <mailto:zoltans at geograph.co.za>> wrote:
> 
> Sorry Dave - I missed acknowledging you on my previous response.
> Yes,... I had forgotten about the Goldfields one (having worked with it in the eighties!) - but I'm not going to toss that one into the pile.
> 
> I'm aiming at producing a guideline for recognising common RSA CRSes by the numeric values of the coords, and if necessary (like the 2-Deg Lo bands) some knowledge of the approx location of the AOI.
> 
> Thanks for your input.
> Regards,
> Zoltan
> 
> On 2017/12/12 15:11, david wrote:
>> Some of the mines still use the various Goldfields systems but few and far between, maybe more important to go from a local coordinate system(sides and angles) to a commonly used coordinate system such as the LO system as many of the properties in SA were surveyed on a local system with no coordinates.
>>  
>> Regards
>> Dave
>>  
>> From: Africa [mailto:africa-bounces at lists.osgeo.org <mailto:africa-bounces at lists.osgeo.org>] On Behalf Of Zoltan
>> Sent: Tuesday, 12 December, 2017 2:40 PM
>> To: Africa local chapter discussions <africa at lists.osgeo.org> <mailto:africa at lists.osgeo.org>
>> Subject: [OSGeo Africa] CRS in use in South Africa
>>  
>> Hi Africa-listers,
>> I want to set an informal assignment for my candidates, to help them recognise common CRSes used in South Africa (South, not Southern).
>> 
>> Off the top of my head I can think of:
>> Non projected Lat Long
>> Lo system (North and/or South facing) projected from either Clarke 1880 [if very old] or WGS84
>> UTM33-36S
>> Are there any others in common use?
>> If so, by whom?
>> 
>> Thanks and keep well,
>> Zoltan
>> 
>> -- 
>>  
>> =============================================
>> Zoltan Szecsei GPrGISc 0031
>> Geograph (Pty) Ltd.
>> GIS and Photogrammetric Services
>>  
>> P.O. Box 7, Muizenberg 7950, South Africa.
>>  
>> Mobile: +27-83-6004028
>> Fax:    +27-86-6115323     www.geograph.co.za <http://www.geograph.co.za/>
>> =============================================
>> 
>> 
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> -- 
> 
> =============================================
> Zoltan Szecsei GPrGISc 0031
> Geograph (Pty) Ltd.
> GIS and Photogrammetric Services
> 
> P.O. Box 7, Muizenberg 7950, South Africa.
> 
> Mobile: +27-83-6004028
> Fax:    +27-86-6115323     www.geograph.co.za <http://www.geograph.co.za/>
> =============================================
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