GPS Positioning Surveys

GPS Positioning Surveys

Positioning of survey ground points by using GPS as per specifications for intended uses. Extension of GPS geodetic control networks to remote areas, establishment of control networks for offshore and underground surveys.

The GPS (Global Positioning System) is a "constellation" of 24 well-spaced satellites that orbit the Earth and make it possible for people with ground receivers to pinpoint their geographic location. The location accuracy is anywhere from meters to millimeters.

GPS Surveying solutions use the GPS Satellite System for commercial use to enable surveyors to accurately locate points on the earth surface. These systems are widely used to enable the accurate mapping of physical features on the earth surface and monitoring deformation as well as plate tectonic movement on the Earth.

 

 Uses of the GPS System: Navigation vs. Mapping vs. Surveying

There are fundamental differences in the features of GPS receivers designed for navigation versus those designed for mapping and surveying. For navigation purposes (on land or over water), the equipment should allow you to enter a course as a series of way-points, then the receivers display distance and heading to each way-point in turn, including estimated time to reach each way-point.

 Mapping and surveying systems are designed for high accuracy, point data collection and are optimized for collecting data to be later exported to an external database or mapping software. These systems expect that you will stop at a location to be surveyed and take a number of readings at rest.

Uses for Surveying and Mapping are:

  • Detail survey for topographic features e.g. roads, manholes, pipeline, power lines, buildings etc.
  • Establishment of Control Points for mapping purpose.
  • Establishment of High Order Framework
  • Scientific measurement for determination of Geoids computations.
  • Engineering Staking Out.
  • Guiding the heavy plant equipments during construction phase.
  • Deformation Monitoring.