A New Approach of Combined Block Adjustment of Multi-Source Satellite Images Based on Existing DOM and DSM

The geographic information resources are the important basic and strategic information resources, which can play an indispensable role in the process of information construction. At present, under the background of national major project of global mapping, the control points of new supplementary image are selected by using the original block adjustment results to carry out the large-scale block adjustment. However, because the large-time span, uneven geometric accuracy, archiving results are not easy to find and other problems. Therefore, in the absence of overseas GCPs, a combined block adjustment scheme of multi-source satellite image based on the existing DOM and DSM is proposed in this paper, in order to not change the previous results and adapt to the urgent needs of good edge matching with the historical loopholes. The results show that the scheme is feasible and can improve the positioning accuracy of edge matching, which provides a significant reference for the production of subsequent global surveying tasks.