[OSGeo Africa] Municipal boundary demarcation
David Barkhuisen
dave at kirchhoffsurveyors.co.za
Wed Jul 20 05:54:54 PDT 2016
Hi
The gazette maps do not describe the area in an accurate manner such as
the way a survey diagram or mining/prospecting diagram does with a
diagram and accurate coordinate list. The gazette maps certainly don't
involve much accuracy seeing as the Ethekwini gazette map in the link
below is not drawn to scale.
http://www.demarcation.org.za/index.php/downloads/boundary-data/kwazulu-natal-4/eth-1/detailed-ward-maps-156/2994-eth-ward-1/file
Regards
David
On 20/07/2016 13:47, Peter Newmarch wrote:
>
> Chris,
>
> The demarcation data is fixed. Its Gazetted as a map and not by
> cadastral boundaries or features. The land might for rating purposes
> fall in JHB, but for approvel purposes (SPLUMA) wherever the
> development falls spatially in terms of the municipal demarcation data
> – then that is the municipality.
>
> I recently saw a case where a parent property was in Municpality A,
> but the new sub was Municpality B – because of the mismatch between
> the data.
>
> Municipal data is determined by people numbers, while the intention
> might be to follow certain cadastral lines, its unfortunately not
> Gazetted that way and so leaves no room for any interpretation
> whatsoever – its fixed in absolute terms.
>
> I know of two cases where very large farms are split down the middle
> because of municipal demarcation lines – but remains one property. I
> have never checked if the farms themselves appear in both municipal
> rates rolls, but certainly they have ward councillors from different
> municipalities on the same land parcel.
>
> If you want to rectify the situation, you have to apply to amend the
> demarcation limits of the city and follow that process.
>
> Regards
>
> Peter
>
> *From:*Africa [mailto:africa-bounces at lists.osgeo.org] *On Behalf Of
> *Chris Kirchhoff
> *Sent:* Wednesday, July 20, 2016 9:12 AM
> *To:* 'Africa local chapter discussions' <africa at lists.osgeo.org>
> *Subject:* Re: [OSGeo Africa] Municipal boundary demarcation
>
> Thanks Aslam,
>
> I have downloaded the shape files from the Demarcation board website
> and the Government Gazette
>
> The problem that arises is that the Demarcation board Shape file
> Municipal boundary line , the property boundary line based on the
> Surveyor General digital boundary data and the actual WGS 84
> coordinates as defined on the approved Surveyor General diagram that
> define the property boundary are not consistent.
>
> The Demarcation board Shape file municipal boundary line shows the
> Tshwane municipal boundary running inside a farm boundary by some 30m.
>
> This farm is supposed to be inside Johannesburg municipality.
>
> The Johannesburg municipality wishes to build a 30m wide road along
> the farm boundary but now sees that part of the road would fall inside
> Tshwane municipality according to the Demarcation board Shape file
> municipal boundary line.
>
> I would assume the obvious response is that the Municipal boundary
> should be contiguous with property boundaries, however I can find no
> legislation that clearly sates this ?
>
> Would you have some thoughts on how to resolve this ?
>
> ……………………………………...
>
> Chris Kirchhoff
> Professional Land Surveyor
> Tel : 082-773 4868
> chris at kirchhoffsurveyors.co.za <mailto:chris at kirchhoffsurveyors.co.za>
> www.kirchhoffsurveyors.co.za <http://www.kirchhoffsurveyors.co.za/>
>
> We believe good spatial information leads to superior planning,
> diminished project risks, improved feasibility assessments and
> efficient resource utilisation.
>
> *From:*Africa [mailto:africa-bounces at lists.osgeo.org] *On Behalf Of
> *Aslam Parker
> *Sent:* 20 July 2016 08:38 AM
> *To:* Africa local chapter discussions <africa at lists.osgeo.org
> <mailto:africa at lists.osgeo.org>>
> *Subject:* Re: [OSGeo Africa] Municipal boundary demarcation
>
> Dear Colleagues
>
> The Municipal Demarcation Board http://www.demarcation.org.za/ is the
> only authoritative source of Demarcation data in South Africa
>
> The Board’s mandate derives from:
>
> The Constitution Of The Republic Of South Africa, 1996 (Act No 108 Of
> 1996).
>
> The Board is mandated in terms of section 155(3)(b) to determine
> municipal Boundaries independently.
>
> Local Government: Municipal Demarcation Act, 1998 (Act No 27 Of 1998)
>
> The latest *boundary data (shapefiles)* can be downloaded from
> http://www.demarcation.org.za/index.php/downloads/boundary-data
>
> We are also encouraged to carefully scrutinise the Section 21 of the
> Local Government: Municipal Demarcation Act 27 of 1998 the Municipal
> Demarcation Board which graphically shows re-determined the municipal
> boundaries. In most cases the boundary changes seems small and
> insignificant, but can have significant socio-political, as well as
> planning implications. http://www.demarcation.org.za/site/?page_id=14588
>
> A Good example :
>
> “ In terms of Section 21 of the Local Government: Municipal
> Demarcation Act 27 of 1998 the Municipal Demarcation Board has
> re-determined the municipal boundaries of Mnquma Local Municipality
> (EC122) and Mbhashe Local M unicipality (EC121) , by excluding the
> Administrative areas of Mhlahlana, Nkonkwana,KwaMente, and KwaNkanga
> from the municipal area of Mnquma Local Municipality (EC122), and by
> including them into the municipal area of Mbhashe Local M unicipality
> (EC121).”The example map can be accessed at
> http://www.demarcation.org.za/index.php/municipal-boundaries/section-21-maps-and-notices/ec-sec21-dems/1104-dem4037-bpfc-sec21/file
>
>
> Aslam Parker | Director: Geo-spatial Information and Professional
> Support |Chief Directorate: National Geo-spatial Information |
> Department of Rural Development and Land Reform | www.ngi.gov.za
> <http://www.ngi.gov.za/>|Cape Town|
>
> Tel +27 21 658 4302|Fax +27 21 689 1351| Mobile082 331 8501|
> aslam.parker at drdlr.gov.za <mailto:aslam.parker at drdlr.gov.za>
>
> *From:*Africa [mailto:africa-bounces at lists.osgeo.org] *On Behalf Of
> *Lydia du Toit
> *Sent:* 20 July 2016 07:44 AM
> *To:* Africa local chapter discussions
> *Subject:* Re: [OSGeo Africa] Municipal boundary demarcation
>
> Hi Chris,
>
> Contact the Demarcation Board, or download from their website.
>
> They have the 2011 and 2016 boundaries available.
>
> Regards
>
> Lydia Du Toit (Pr GISc)
> Mobile: 0832713158
> Email: Lydiadt at mweb.co.za <mailto:Lydiadt at mweb.co.za> or
>
> *From:*Chris Kirchhoff <mailto:chris at kirchhoffsurveyors.co.za>
>
> *Sent:*Wednesday, July 20, 2016 5:41 AM
>
> *To:*'Africa local chapter discussions' <mailto:africa at lists.osgeo.org>
>
> *Subject:*[OSGeo Africa] Municipal boundary demarcation
>
> Hi
>
> Is there a formal/ legal source of municipal boundary positions
> especially for boundary between Johannesburg and Tshwane municipalities
>
> Thanks
>
> Chris
>
> ……………………………………...
>
> Chris Kirchhoff
> Professional Land Surveyor
> Tel : 082-773 4868
> chris at kirchhoffsurveyors.co.za <mailto:chris at kirchhoffsurveyors.co.za>
> www.kirchhoffsurveyors.co.za <http://www.kirchhoffsurveyors.co.za/>
>
> We believe good spatial information leads to superior planning,
> diminished project risks, improved feasibility assessments and
> efficient resource utilisation.
>
> *From:*Africa [mailto:africa-bounces at lists.osgeo.org] *On Behalf Of
> *Gavin Fleming
> *Sent:* 19 July 2016 11:13 AM
> *To:* africa at lists.osgeo.org <mailto:africa at lists.osgeo.org>
> *Subject:* Re: [OSGeo Africa] QGIS splitting lines at intersections
>
> On 19/07/2016 11:05, Zoltan wrote:
>
> Hi Gavin,
> I did see the one using "another layer", but that is problematic
> as when one is digitising (say) a town road network you would want
> to honour the straightness of the roads and then intersect them
> afterwards.
>
> If you're doing it while digitising I would rather set up snapping
> perfectly then node intersections while digitising. As simple as
> stopping a line and starting a new one instead of just clicking a
> vertex at an intersection.
>
> Hence "popping out" to other facilities just messes up your work-flow.
>
> Will look at the scripting options - for now this is just a
> training exercise in teaching digitising principals.
>
> Thanks & keep well,
> Zoltan
>
> --
>
> ------------------------------------------------------------------------------------------
>
> Image removed by sender.
>
> Gavin Fleming - Joint MD - PrGISc [PGP1234]
>
> Visit http://kartoza.com <http://kartoza.com/> to find out about open
> source:
> * Desktop GIS programming services
> * Geospatial web development
>
> * GIS Training
>
> * Consulting Services
>
> Skype: phlemingo
>
> Office: +27(0)878092702
>
> Image removed by sender. <http://w3w.co/moats.romance.tornado>
>
> -------------------------------------------------------------------------------------------
>
> Kartoza = Linfiniti ∪Afrispatial
>
> ------------------------------------------------------------------------
>
> _______________________________________________
> Africa mailing list
> Africa at lists.osgeo.org <mailto:Africa at lists.osgeo.org>
> You can UNSUBSCRIBE at http://lists.osgeo.org/mailman/listinfo/africa
>
>
>
> _______________________________________________
> Africa mailing list
> Africa at lists.osgeo.org
> You can UNSUBSCRIBE at http://lists.osgeo.org/mailman/listinfo/africa
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://lists.osgeo.org/pipermail/africa/attachments/20160720/a650301d/attachment-0001.html>
-------------- next part --------------
A non-text attachment was scrubbed...
Name: not available
Type: image/jpeg
Size: 26137 bytes
Desc: not available
URL: <http://lists.osgeo.org/pipermail/africa/attachments/20160720/a650301d/attachment-0003.jpe>
-------------- next part --------------
A non-text attachment was scrubbed...
Name: not available
Type: image/jpeg
Size: 545 bytes
Desc: not available
URL: <http://lists.osgeo.org/pipermail/africa/attachments/20160720/a650301d/attachment-0004.jpe>
-------------- next part --------------
A non-text attachment was scrubbed...
Name: not available
Type: image/jpeg
Size: 338 bytes
Desc: not available
URL: <http://lists.osgeo.org/pipermail/africa/attachments/20160720/a650301d/attachment-0005.jpe>
More information about the Africa
mailing list