Abstract:

In the process of topographic map production, it takes a lot of time to collect and compilecontour line, and it requires high experience of operators. To this end, the paper aims to generate tiltedimage point cloud by Context Capture software, extract ground points and critical points by the functionmodule of Terrasolid software to obtain the final ground points, and generate vector contour lines basedon the final critical ground points. After compilation and modification , the contour results can providereliable contour data for the production of topographic maps and improve the production efficiency of con-tour lines and topographic maps.

Key words: tilt image technology, dense point cloud, digital elevation model, contour line