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Gns Rtk Cadastral Surveying Case Study

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An assessment of GNSS-RTK Network Technology for cadastral surveying

An assessment of the Accuracy of GNSS-RTK Network in cadastral surveying.
(A case study of Nelspruit)

Using Network-RTK for Cadastral Reform
By me
RB MAHLALELA
209287781

Terms and Concepts
GPS Global Positioning System
GNSS Global Navigation Satellite System
RTK Real Time Kinematic
LRK Long Range Kinematic
NRTK Network Real Time Kinematic
SBAS Satellite-based augmentation systems
GLONASS Global Orbiting Navigation Satellite System
NSRS National Spatial Reference System
IGS International GNSS Services
IAG International Association of Geodesy
OSGeo Open Source Geospatial Foundation
CORS Continuously Operating Reference Station
PPP Precise Point Positioning Definitions …show more content…

The cadastral records are kept by the six offices of the Surveyor General’s (SG) offices, with each office being responsible for the cadastral surveys done in its jurisdictions. The SG offices process survey records, examine, approval or rejection and manage all records including diagrams, general plans and sectional plans. This information is available to the public at the offices or online at Chief Surveyor General’s website (CSG) (www.csg.co.za). Though not all registered parcels are available but there is also a spatial webpage to view the registered parcels (Functions, 2014), see Appendix 1.
It is mandatory that all cadastral surveys are connected to the National Control Survey System to ensure that properties do not overlap and to accurately identify the boundary beacons of properties. The National control Survey System is marked by a network of trigonometric beacons and town survey marks which is based on the World Geodetic System 1984 (WGS84) ellipsoid, the origin being the position of Hartebeeshoek Radio Astronomy Telescope. South African cadastral is carried out using a total station and now with a GPS, and obtaining highest accuracy is essential especially in urban areas (General, 2014). See figure 1 below on how Cadastral parcel and ownership rights is …show more content…

Surveys must be carried out according to prescribed accuracies, three classes of survey with specified accuracy limits are listed below. In South Africa most cadastral surveys are carried out using total stations and/or GPS. Accuracy bends can be defined as follows for Control surveys – high accuracy, detail surveys – medium accuracy and positioning – with low accuracy accepted (RICS, 2010). There are three classes of survey, each with its specified accuracy

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