Photogrammetry principle

Simply put, take photos before measuring. Or measured by photography. It transforms the traditional field measurement into the indoor measurement on the three-dimensional model. The principles involved include but are not limited to:

1, principle of imaging platform (satellite, plane, hot air balloon)

2. The principle of imaging sensor (linear camera, area camera, CCD, CMOS, radar, lidar, etc. )

3. The principle of stereoscopic imaging (why stereoscopic observation can be made through images);

4. The principle of coordinate transformation (how to compare photos with the field by mathematical methods, so as to measure the real world by photos).

5. Principles of survey adjustment (how to evaluate the accuracy of survey results)