Characteristics of photogrammetry

The measurement and interpretation of images are mainly carried out indoors, without touching the object itself, so they are rarely limited by climate, geography and other conditions; The photographed image is a true reflection of the objective object or target, with rich information and intuitive image, from which people can obtain a lot of geometric and physical information of the studied object; It can take instantaneous images of dynamic objects and complete the measurement work that is difficult to achieve by conventional methods; Suitable for large-scale topographic mapping, with high speed and efficiency; The products have various forms, and can produce paper topographic maps, digital line drawings, digital elevation models, digital orthophoto maps, etc.