嵌入式GIS多比例尺地图数据混合组织模型设计

Hybrid Model Design of Multi-Scale Map Data on Embedded GIS

多比例尺地图数据组织模型极大影响嵌入式GIS系统性能指标。硬件平台的巨大差异使得目前PC机平台上较成熟的全动态或全静态模型不能直接应用嵌入式环境。综合这两种模型的优点,基于嵌入式环境和电子地图应用模式,静态和动态相结合的混合模型,此模型能够极大减少地图数据冗余并提高地图数据访问效率。

How to organize multi-scale map data will greatly influence an embedded GIS performance. Due to much difference between PC and embedded platforms in hardware resources, the simple dynamic model and the static model which are widely used on PC are unfit for an embedded system. Integrating these two models, this article puts forward a hybrid model to organize multi-scale maps, which can greatly decrease map data redundance and improves response speed.