| 嵌入式GIS中矢量地图快速显示策略研究 |
| |
| 引用本文： | 马亚明,张亚军,张瑞生.嵌入式GIS中矢量地图快速显示策略研究[J].测绘学院学报,2009(4). |
| |
| 作者姓名： | 马亚明 张亚军 张瑞生 |
| |
| 作者单位： | 63870部队;信息工程大学测绘学院;65015部队; |
| |
| 摘 要： | 通过分析嵌入式设备的特点和已有研究成果,提出从数据模型和显示机制调整两方面来提高嵌入式GIS中矢量地图的显示速度。采用多种索引机制组织多尺度空间数据,阐述了空间数据的动态调度策略,设计了一种适合嵌入式GIS的数据模型。然后结合VxWorks详细介绍并实现了显示机制调整的3个策略:系统双缓存机制、图形设备环境双缓存机制以及基于双缓存的局部地图刷新。实际工程应用表明,这些策略能够极大地提升嵌入式GIS中矢量地图的显示速度。对空间数据的动态调度策略应作进一步的定量研究。
|
| 关 键 词： | 嵌入式GIS 矢量地图 空间索引 动态调度 双缓存 |
Study on Fast Displaying Strategies of Vector Map Based on VxWorks |
| |
| MA Ya-ming,ZHANG Ya-jun,ZHANG Rui-sheng.Study on Fast Displaying Strategies of Vector Map Based on VxWorks[J].Journal of Institute of Surveying and Mapping,2009(4). |
| |
| Authors: | MA Ya-ming ZHANG Ya-jun ZHANG Rui-sheng |
| |
| Institution: | 1.63870 Troops;Huayin 714200;China;2.Institute of Surveying and Mapping;Information Engineering University;Zhengzhou 450052;3.65015 Troops;Dalian 116023;China |
| |
| Abstract: | By analyzing the characteristics of embedded device and the existing production,the idea of improving the speed of vector map rendering in embedded GIS by means of optimizing data model and adjusting display mechanism was put forward.Using several spatial indexes to organize the multi-scale spatial data and expatiating the strategies of spatial data's dynamic loading,a data model suitable to embedded GIS was designed.And three strategies to adjust visualization mechanism were described and implemented,such ... |
| |
| Keywords: | embedded GIS vector map spatial index dynamic loading double buffer |
| 本文献已被 CNKI 等数据库收录！ |
