An application research on mobile GIS of off-line system architecture

摘要

This paper defines Mobile GIS of off-line system architecture and describes its main features. Because intelligent mobile terminals do not have powerful and professional spatial database system supported, one kind of practical spatial database structure of off-line mobile GIS is proposed. Algorithms of some kernel technologies are improved according to the features of intelligent mobile terminals. In order to verify the reasonableness of spatial data organization and the validity of the improved algorithms, mNav project is implemented and we show how the applied technologies influence the whole system performance.