Global Positioning System, or GPS, is a highly precise navigational tool that relies on satellites to provide exact latitudinal and longitudinal measurements. Originally developed for the military, GPS has since been adopted by the civilian world and plays a critical role in all kinds of industries, from architectural design and surveying to air travel. One of the most common applications of this navigational system in the commercial world is the GPS survey. Today, there are three main methods for determining coordinates that surveyors can use.

Static GPS Baseline refers to the practice of determining coordinates by recording navigational data over one known and one unknown survey point for 20 or more minutes. When this data is processed, it will reveal the coordinate of the unknown point within 5mm, as long as there was sufficient satellite availability during the recordings.

To survey a larger area, contractors might use Real Time Kinematic (RTK) Observations. During this process, one receiver remains at the Base Station and another moves between positions. The position of the moving receiver, or Rover Station, can be determined within a few seconds. As long as the unknown point is within 10km of the base station, this approach is about as accurate as the Static GPS Baseline approach.

If contractors need to complete a major architectural or engineering project, they might use Continuously Operating Reference Stations (CORS). In this GPS surveying approach, a permanent receiver is installed at a known location to help determine all of the coordinates in the area. This approach is so precise and convenient that many countries actually have their own CORS systems already in place for various industries to use. The CORS system can also provide instant positioning coordinates similar to the RTK method using a mobile phone connection.

 If you need surveying services in Hillsboro, OH, turn to McCarty Associates. Visit their website to learn more about the topographic surveys they provide, and call (937) 393-9971 to discuss your GPS survey needs today.