NPM Geomatics

Land Survey Specifications

because you need to know what to expect

Deliverables and Quality Control for Various Types of Land Survey

  1. Correct, complete and comprehensive land survey deliverables and data
  2. Our bespoke Land Survey Specifications Matrix helps Built Environment Professionals provide appropriate and relevant survey specifications for tender and quote documents. The Matrix is available below.
  3. Rigorous internal Health & Safety, Field and Office checking routines ensure that you receive survey data which you can rely on for your designs and projects.
  4. Reliable and high quality data aligned to the requirements of TMH11 land survey protocols.

Standard Tachy Surveys

NPM Geomatics Professional Land Surveyors commit to providing a professional service:

  1. Land surveys are connected to the SA Hartebeeshoek 1994 datum, based on the WGS84 ellipsoid. 
  2. Heights are provided relative to mean sea level.
  3. Survey of all visible features, floor levels, invert levels, change in slope, and other critical features. In open areas a grid of 15 – 20m is utilised, depending on the scope of the project.
  4. For strip surveys, cross sections at 10m, 15m or 20m are provided, depending on the scope of the project.
  5. Use of Total Station for hard standing surfaces, when required by project specification.
  6. Use of digital level for benchmark heights, when required by project specification.
  7. Use of survey grade RTK GPS, with SA2010 Geoid model for improved height accuracy for all other measurements.
  8. A minimum of 2 concrete benchmarks, with a metal name tag for future use, built at construction phase.
  9. A Comprehensive Survey Report, signed by a professional land surveyor, detailing project methodology, equipment used, accuracy and establishment of control.
  10. Control list of benchmarks with descriptions and method of fixing height.
  11. Code list of all points in the DTM, with descriptions and code source (TMH11 or NPM coded).
  12. 3D drawing of all features and annotations, with 3D contours and 3D triangles, supplied as a DWG CAD file and PDF print.
  13. DTM in Civil Designer ASCII format with breaklines, plus Land XML format. (Model Maker .tot file on request).
  14. Where applicable, accurate cadastral data which has been reconstructed by a professional land surveyor.
  15. Where applicable, a cadastral overlay sourced from a public domain database which is provided for information purposes only.