[OSGeo Africa] Getting ancient SG diagrams into GIS
Athenkosi Ntshate
ntshatea at gmail.com
Wed Nov 18 07:08:13 PST 2015
I would like to assist as well please send them to ntshatea at gmail.com will
look at t first thing tomorrow morning. And please colleagues I am a GIS
Technician intern at Department of Human Settlements, I just wrote my Plato
exam on the 9th and have a valid drivers license. I majored with Geology
and GIS with Remote Sensing. I have Passed ArcBasic and have an
understanding of Quantum,TnTMips,Erdas Imagine and ArcMap 9 and 10. I have
an expirience of 1 year 8 months and looking for GIS opportunities my
contract is ending next March so would like your assistance when you see
openings to please forward me also at ntshatea at gmail.com.
Regards
A Ntshate
Cell 0837830561
Work 0437119823
On 18 Nov 2015 2:05 PM, "Aslam Parker" <Aslam.Parker at drdlr.gov.za> wrote:
> Hi
>
> The 1904 and 1912 diagrams will be in local coordinate systems. You need
> to identify the accuracy of the coordinates that is required in GIS.
>
> I would advise you to get the spatial data from the SG and see if you can
> relate the diagrams to that. It would be a good initial approximation of
> the property of the dimensions of the SG spatial data corresponds to the
> diagrams
>
> If you require very accurate, you need to employ the services of a Land
> Surveyor who will search adjacent properties or the e-records of the
> Surveyor General for modern coordinates in the national control survey
> network.
>
> -----Original Message-----
> From: Africa [mailto:africa-bounces at lists.osgeo.org] On Behalf Of Sindile
> Bidla
> Sent: 18 November 2015 12:43 PM
> To: Africa local chapter discussions
> Cc: Hanlie Pretorius
> Subject: Re: [OSGeo Africa] Getting ancient SG diagrams into GIS
>
> Dear Henlie,
>
> What I sometimes do is to see if I can relate an old diagram to its
> adjacent properties and perform geo-referencing - but obviously this is
> also dependent on your use case. I would then make a note of such on my
> data.
>
> Please also do send the diagrams.
>
> Sindile Bidla
>
> On 2015/11/18 12:26 PM, Hanlie Pretorius wrote:
> > Hi,
> >
> > A client of mine has sent me 6 SG diagrams dating from 1904 to 1912
> > and wants me to get them into GIS.
> >
> > From my previous experience these will be using a local coordinate
> > system that needs to be converted to a modern coordinate system that
> > GIS and I understand. Since I'm not trained as a surveyor, this is
> > beyond my capabilities.
> >
> > One of the diagrams has a note that refers to a 1998 consolidation
> > diagram that I found on the SG site, but it doesn't help me at all,
> > looking at the 2014 farm data that I have.
> >
> > Is anyone on the list perhaps willing to help me with this? If so, I
> > can send you the diagrams and the coordinates on them in Excel format.
> >
> > Thanks
> > Hanlie
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