Most of the conventional topographic map drawing methods adopt the principle of tilt photography real scene 3D model, which is more suitable for land area survey and drawing. The application effect in the water area topographic map drawing is poor, the plane error of the topographic map is large, and the drawing accuracy is low. Based on this, a new rendering method was proposed by introducing the principle of digital aerial photogrammetry. Firstly, digital aerial photography parameters was designed, including ground sampling distance(GSD), altitude, and image overlap. Then, image control points was set up and global navigation satellite system real time kinematic(GNSS-RTK) technology was used to measure the coordinates of the image control points. On this basis, the digital aerial photogrammetry technology was used to obtain the plane and elevation elements of the topographic map respectively, and then the topographic map was drawn. The experimental results show that the new method is highly feasible, its plane mean square error is small, the maximum is not more than 0.091 m, and the accuracy of topographic map drawing is high.

digital aerial photogrammetry  /  method  /  water area  /  topographic map  /  draw