Application of POS technology in fast making DOM from digital aerial images

In the era of digital information, digital orthophoto map (DOM) has been considered as the ideal image background for the GIS database of geographic information, how to produce DOM effectively and accurately is an urgent problem to be solved. Aerial photogrammetry assisted by POS system requires only a small amount of ground control points, it has important significance to improve the production efficiency of DOM and to reduce the cost. In this paper, we take the DOM production of Han Cheng area on a scale of 1∶2000 as an example to introduce the technical process and method of DOM production auxiliary by POS system. Through accuracy analysis, it shows that it can reach the required accuracy requirements only through a small number of ground control points by using POS data.