We have a team of Photogrammetry experts with cross-platform expertise and they strive for accurate data generation while surveying the surfaces. Our focus is to make sure that each model can be oriented exactly as required for stereo compilation in orthophoto, line mapping and/or Digital Terrain Elevation extraction by constructing from ground control and adding sufficient points in photogrammetric models.
We use airborne IMU coordinates and densify the encompassing ground controls through computational methods for the digital map production. After collecting the camera calibration reports, scanned images and ground control data; our GIS experts refine the AT (Aerial Triangulation) Orientation parameters through geo-referencing each image to produce exact DSM thorough planimetric data. According to the project requirement, we perform GCP (Ground Control Point) identification & measurement, automatic and manual tie points diagnosis and special algorithm iteration for error propagation.