面向嵌入式GIS的数据组织模型与存取机制  

Data Organization Model and Access Mechanism Facing Embedded GIS

作　　者：陈玉进 李泉 柳盛[1,2] 王春红 

机构地区：[1]南京跬步科技有限公司,江苏南京210008 [2]南京师范大学虚拟地理环境教育部重点实验室,江苏南京210046

出　　处：《南京师范大学学报（工程技术版）》2008年第4期159-162,共4页Journal of Nanjing Normal University(Engineering and Technology Edition)

摘　　要：地图显示效率一直是嵌入式GIS系统的核心问题.一方面,嵌入式系统处理器性能低、内存容量小;另一方面,GIS数据量大、计算复杂.针对这一对突出的矛盾,本文提出了一种新的GIS数据组织模型与存取机制,在I/O阶段,从逻辑和物理2个层面最大限度地减少对冗余数据的读取和处理,保障地图的快速显示.That the map shows efficiency has always been the core issue of embedded GIS system. On the one hand, embedded systems processors have low performance and low memory capacity. On the other hand, GIS has large data volume and complexity in calculation. Aiming at this pair of outstanding contradictions, the paper proposed a new organizational model and GIS data access mechanism, in the I/O phase, from the logical and physical levels, to minimize re- dundant data on the reading and processing, and secure the rapid display of the map.

关 键 词：嵌入式GIS 纵向分级 网格索引 Hilbert排序 缓存 

分 类 号：TP311[自动化与计算机技术—计算机软件与理论]