Abstract: This article proposes a terrain level geographic scene construction method based on Leica CityMapper mixed data, elaborates on the main steps and key technologies involved in this method, and verifies and analyzes it through a provincial-level real-life 3D construction example. The results show that this technology has the advantages of high elevation accuracy, consistency between texture and model time and saes updating cost. This technology has obvious advantages in the updating of terrain level geographical scenes, especially in the updating of banded areas (new high-speed railways, highways, canals and so on),which has high application value.

Key words: Leica CityMapper, mixed data, terrain level geographic scene, realistic 3D construction