摘要
重新设计了从高程格网中提取等高线过程中的遍历策略,以保证提取结果具有统一的方向;针对日益增长的高程格网数据量,提出了基于区间树索引来查找等高线起点的算法。
There are two sub-task of automatic contouring from grid DEM. The first is choosing a starting cell and the next is the threading process. A new algorithm is proposed based on interval tree to determine starting points of contour lines. The result improves the algorithm's efficiency remarkably. Further, a new strategy is designed to constrain the direction of threading and the resulting contour bears more meaningful information.
出处
《武汉大学学报(信息科学版)》
EI
CSCD
北大核心
2007年第2期131-134,共4页
Geomatics and Information Science of Wuhan University
基金
地理空间信息工程国家测绘局重点实验室开放研究基金资助项目(B2526
2534)
辽宁工程技术大学地理空间信息技术与应用实验室开放研究基金资助项目(2006003)