Digital Orthoimage Generation with Low Altitude Photogrammetric System Based on Unmanned Airship

This paper present that the low altitude photogrammetric system based on unmanned airship is composed of hardware and software. Furthermore, the digital orthoimage generation of a certain area in south is taken an example to expatiate flight routes planning, ground control points selection and surveying, data processing including images preprocessing, image matching, aerial triangulation, ortho rectification, and so on. It proves that this low altitude photogrammetric system based on unmanned airship can be utilized to rapid acquisition of digital orthoimage.