A GPS land survey uses the Global Positioning System (GPS) satellites to establish survey points with
GPS control surveys use the global positioning system (GPS) satellites to calculate the points of a survey. The GPS system is made up of a network of satellites that orbits the earth and sends a signal to GPS receivers and Navigation devices, giving them a precise location, speed, and altitude.
A GPS survey uses high precision survey-grade global positioning receivers to establish the horizontal and vertical values for remote locations. These measurements can be calculated without having a clear line of sight between points on the ground. This enables the surveyor to work in difficult terrain and be able to cover large areas in an efficient and precise manner.
Wellington Land Surveying has extensive experience in applying Static GPS Surveys and Real Time Kinematic (RTK) Surveys technologies to a vast variety of projects including transmission line route surveys, topographic surveys and construction surveys.
GPS surveying equipment is used to gather the vertical and horizontal positions of existing features to create boundaries, topographic maps, improvements and planned locations for construction.
With our GPS receivers, the receiver almost instantly calculates its position (Latitude, Longitude, and Height) with an uncertainty of a few meters, from the data broadcast by the GPS satellites. This data also includes a description of the satellites changing their orbital position and the time the data was transmitted.
Static GPS Surveys
Static GPS is used for determining accurate coordinates of survey points by recording GPS observations over a known and unknown survey point. Static procedures are used to establish baselines between a stationary GPS unit by recording data over an extended period of time during which the satellite’s geometry changes. It is still the preferred approach to establishing the most accurate surveyed positions, the control.
Real Time Kinematic (RTK) Surveys
Kinematic GPS Surveys are where one receiver remains in one position over a known reference point (Base Station) and one receiver moves between positions (Rover Station). The position of the Rover can measure and store the data using a radio link to provide any coordinate corrections. All baselines are produced from the stationary GPS unit as a reference station to the rover units.