Drone mapping or surveying is used to capture aerial data using downward facing sensors such as RGB, multispectral cameras and LIDAR payloads. Using the data collected by drones, a photogrammetry software can create geo-referenced orthomosaics and 3D models of the captured area.
The accuracy of drone survey depends on various factors:
- Type of drone
- Quality of components
- Camera used for mapping
- The region which is being surveyed, and some more.
Unlike manned aircrafts, drones can fly at a much lower altitude. As a result drone imageries are of high accuracy and resolution, even in complex and difficult to access regions.
Advantages of using drone for mapping
ACCURATE & EXHAUSTIVE DATA: A drone can produce thousands of measurements, representable in different formats such as contour lines, point cloud, orthomosaic, etc. Each pixel of the 3D models contain 3D geo-data.
SURVEY TIME: Usage of drones for capturing topographical data is approximately five times faster than that of traditional methods. Also the PPK geo-tagging doesn’t require placing of GCPs. Thus saving a lot of time.
MAPPING INACCESSIBLE AREA: From steep slopes to harsh terrain, drones can reach out to places unreachable or unsafe for humans. Drones can fly almost everywhere. Drones don’t require closing down railway tracks or highways for surveying, it can collect aerial data without hampering operation.
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