Abstract

Nowadays, high resolution satellite image and Lidar data are two of the main data source for setting up high accuracy detailed GIS. In Lidar project, airphoto usually acquired simultaneously but if due to technical situation (night fly or malfunction with photocamera) there is no airphoto, high resolution satellite image is relatively compatible replacement in term of level of detail to accompany Lidar data through post-processing as well as information extraction. The ortho- rectification using DSM increase accuracy of orthophoto, remove displacement of high feature especially for residential area with high density of building. This article present research results on methods for satellite image rectification, requirements of control points and proposed the a workflow for ortho-rectification of satellite image using DSM Lidar. Experimental work in the town of BacGiang with WorldView1, panchromatic, resolution 0.5m image utilizing DSM from Lidar 2.5 points/m2 is introduced. Results of ortho-rectification using DEM and DSM are compares and evaluated. Conclusions and recommendations for applying proposed workflow in the future drawn from experimental results.