[OSGeo Africa] CRS in use in South Africa

[Charles Rethman]

Sorry, forgot to mention that provinces have different standard parallels and longitudes of centres, of course!

— Charles.

> On 12 Dec 2017, at 16:18, Charles Rethman <rethman at telkomsa.net> wrote:
> 
> 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>
> skype: cwrethman
> mobile: +27 71 6735502
> home: +27 21 6861510
> 
> 
>> 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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