9Zhu Huatong, Yang Yuanxi and Lu Zhiping. Transformation of GPS coordinate system[ M]. Beijing: Publishing House of Surveying and Mapping, 1994. (in Chinese).
10Teaching and Researching Group on Control Survey of Wuhan College of Surveying and Mapping, Teaching and Researching Group on Geodesy of Tongji University (ed).Control Survey (2nd V. )[M]. Beijing: Publishing House of Surveying and Mapping, 1992. (in Chinese).