{ "culture": "en-ZA", "name": "", "guid": "", "catalogPath": "", "snippet": "A standard Town Survey Mark (TSM) comprises of a brass peg in concrete at a depth of at least 24cm underground. It is protected by a cast iron cover placed flush with the ground surface. \nTSMs form part of an integrated surveyed system of control points throughout South Africa. The TSM dataset comprises of approx. 10000 control points at regular intervals within the municipal boundary of the City of Cape Town. They are maintained on an ongoing basis with its mandate given by the Land Survey Act 8 of 1997, section 42(4)a.\nTSMs are installed and surveyed to highest possible accuracy standards, usually at sub centimetre level. Their locational co-ordinates are determined by network adjust methods and precise levelling.\nCo-ordinates are based on the South African Hartebeesthoek 94 Datum and the World Geodetic System 1984 (WGS84) as ellipsoidal reference.", "description": "

The TSM dataset contains the co-ordinates of approx. 10000 control points. They are spread across the municipal area of the City of Cape Town. The dataset includes standard TSMs, Bench Marks, additional control points and photo control points.<\/SPAN><\/P>

<\/P><\/DIV><\/DIV><\/DIV>", "summary": "A standard Town Survey Mark (TSM) comprises of a brass peg in concrete at a depth of at least 24cm underground. It is protected by a cast iron cover placed flush with the ground surface. \nTSMs form part of an integrated surveyed system of control points throughout South Africa. The TSM dataset comprises of approx. 10000 control points at regular intervals within the municipal boundary of the City of Cape Town. They are maintained on an ongoing basis with its mandate given by the Land Survey Act 8 of 1997, section 42(4)a.\nTSMs are installed and surveyed to highest possible accuracy standards, usually at sub centimetre level. Their locational co-ordinates are determined by network adjust methods and precise levelling.\nCo-ordinates are based on the South African Hartebeesthoek 94 Datum and the World Geodetic System 1984 (WGS84) as ellipsoidal reference.", "title": "ERDB_LDR.SL_CGIS_TSM", "tags": [ "town", "survey", "marks" ], "type": "", "typeKeywords": [], "thumbnail": "", "url": "", "minScale": 150000000, "maxScale": 5000, "spatialReference": "", "accessInformation": "Development Information & GIS Department, Geodetic Survey section, 2nd floor Keller House, 121 Loop Street, Cape Town, 8001, contact: Mr. George Lucas, Tel 021 487 2232, email: george.lucas@capetown.gov.za.\nData distributed by CityMaps public counter, 7th floor Keller House, 121 Loop Street, Cape Town, 8001, email: City.Maps@capetown.gov.za.\nDataset is available on the City of Cape Town Open Data Portal:\nhttp://web1.capetown.gov.za/web1/OpenDataPortal/", "licenseInfo": "

Co-ordinate values having .00 for both Y and X have not been surveyed and are for approximate plotting purposes only.<\/SPAN><\/P>

The dataset Additional_control_points may not be used for cadastral survey purposes and these co-ordinate values must not be reflected on diagrams or General Plans as they have not been gazetted yet. However, the accuracy of the GPS network surveyed additional control points are of the same accuracy order as the TSMs.<\/SPAN><\/P>

The City of Cape Town and its employees are not liable for any incorrect values.<\/SPAN><\/P>

In all instances co-ordinates must be verified by surveying to the surrounding TSM's.<\/SPAN><\/P><\/DIV><\/DIV>", "portalUrl": "" }