Institution: | 1. State Key Laboratory of Geo-Information Engineering, Xi 'an 710054, China; Xi 'an Research Institute of Surveying and Mapping,Xi 'an 710054, China; State Bureau of Surveying and Mapping Key Laboratory for Polar Surveying and Mapping Science, Wuhan 430079, China 2. State Key Laboratory of Geo-Information Engineering, Xi 'an 710054, China; Xi 'an Research Institute of Surveying and Mapping,Xi 'an 710054, China |