To fly the UAV through a pre-programmed flight plan, an autopilot flight controller is often included. UAVs have become more reliable and easier to work with: from programming flight paths to installing additional equipment on board, UAV applications are no longer confined to a limited group of specialists.įor a survey flight, your UAV will need to have installed: a high-resolution camera and a high-end GNSS receiver module. GCPs are high accuracy points captured on the ground either before or after a flight that are used to adjust output products created in ArcGIS Drone2Map. Improvements in Unmanned Aerial Vehicle (UAV) technology combined with more compact high-end Global Navigation Satellite Systems (GNSS) receivers means that you no longer have to compromise on precision to measure in those hard-to-reach areas. Still feeling confident? You should and here’s why. The ground control points and their coordinates are then used to help drone. The GCPs are made visually distinct using high-visibility markers so that they show up easily in the aerial survey. The location of each GCP is measured on the ground using a high-accuracy GPS receiver. These are pre-identified points within the survey area. If you use ground control points with your aerial map, you first need to determine the RTK GPS coordinates at the centre of each ground target. In mapping, ground truth is established using ground control points (GCPs). Throw in the fact that the area you have to survey is in a quarry which has been closed off due to a recent landslide. Ground Control Points, or GCPs, are large marked targets on the ground, spaced strategically throughout your area of interest. This was made with the absolute beginner in mind. Feeling confident? How about a few hundred points spread over 7.5 hectares (18.53 acres) and the job has to be done in one afternoon. Ground Control Points identify recognizable features in the input images and align them to a known location (X, Y and Z coordinates). In this almost 2 hour video, I cover every aspect of collecting ground control points. You’ve been asked to survey some points on the ground with centimetre-level accuracy.
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