嵌入式GIS线要素无缝拼接的数据结构及实现算法  

The arithmetic and data structure of embedded GIS line feature's seamless connection

作　　者：胡泽明[1] 岳春生[1] 王志刚[1] 

机构地区：[1]解放军信息工程大学,郑州450002

出　　处：《测绘科学》2006年第5期102-103,65,共3页Science of Surveying and Mapping

摘　　要：在嵌入式系统中,电子地图的数据是按分幅分块描述的,这会使完整的线状地理实体在图块边界产生数据缝隙,如何快速响应和无缝显示的算法值得研究。针对嵌入式硬件平台特性,本文在给出线要素点坐标描述方法基础上,提出利用图块边界点关联索引表法来实现无缝拼接,算法实现时占用的存储空间小,执行速度快。The data map is stored according to sheet or block in an embedded system,thus causing seam in the cutting-border for a physical integrated line feature.Fast response and seamless display make it necessary to study cutting line feature seamless connection.Based on point coordinate data and map-block border-vertex associate table,this article efficiently describes seamless connection process of cutting-line feature on Embedded studio.This arithmetic possesses less memory and runs quickly.

关 键 词：嵌入式GIS 无缝GIS 图块边界点关联索引表 双缓存技术 

分 类 号：TP311[自动化与计算机技术—计算机软件与理论]