Direct Geopositioning Accuracy using AirGon Loki – A Case Study

Introduction: In September of 2017, AirGon LLC released Loki, a direct geopositioning system for the DJI Inspire 2 drone as well as generic drones carrying a digital single lens reflex (DSLR) camera.  Since that time, Loki has been adapted to the Phantom 4 Pro and the m2xx series of DJI drones.   A direct geopositioning system…

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Control Point Statistics in TerraScan

Terrasolid software offers a variety of ways to gauge the accuracy of LIDAR and imagery data.  From using control points to determine the vertical accuracy of a ground surface, tie lines to measure and correct the mismatch between overlapping flight lines, and tie points to correct aerial imagery positions, each of these tools provide the…

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Vertical Accuracy Reporting in TerraScan

In November 2014, the American Society for Photogrammetry and Remote Sensing (ASPRS) released an updated standard, Positional Accuracy Standards for Digital Geospatial Data, to tie together past experience with current industry practice of preparing data, but not plotting the resulting maps. The new standard provides guidelines for calculating both the vertical and the horizontal accuracy.…

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