jgg     2011 31 (6):  113-116    ISSN: 0412-1961  CN: 21-1139/TG TRANSFORMATION OF GPS HEIGHT BASED ONGENERAL REGRESSION NEURAL NETWORK Wang Xinzhi 1) ; Zhu Mingkun 2) ; and Cao Shuang 1) 1)School of Remote Sensing, Nanjing University of Information Science and Technology, Nanjing 210044; 2)Qingdao Institute of Surveying Mapping and Geotechnical Investigation, Qingdao 260032 Received: 1900-01-01  Revised: 1900-01-01  Online: null Supporting info null