Research Article
A Spatial Database Index Method Based on Doubletree Structure
Science and Technology, Nanjing University of Posts and Telecommunications, Nanjing, China
Hao Wu
School of Telecommunication and Information Engineering, Nanjing University of Posts and Telecommunications, Nanjing, China
Chunling Chen
School of Computer Science and Technology, Nanjing University of Posts and Telecommunications, Nanjing, China