On-line/off-line spatial data management and calling method for intelligent terminal map rendering

The invention discloses an on-line/off-line spatial data management and calling method for intelligent terminal map rendering. The method comprises steps of data storage and encryption by use of an intelligent terminal open source database on the basis of a tile map pyramid model, off-line data packet initialization and data updating and calling. Seamless switch can be completely automatically performed in on-line and off-line states, stable and smooth browsing and use of a map in different network environments are realized, automatic data updating in the on-line mode is realized through judgment of the current network environment, and calling of the latest data in the off-line state as far as possible is ensured. The method has the significant benefits as follows: the mobile data flow cost of a user is reduced, and the state switch operation of the user is reduced; the software usability is improved, data safety is guaranteed, and the transmission efficiency of data packets is improved. 本发明公开了种面向智能终端地图渲染的空间数