基于约束TIN的面状要素中轴线提取算法  

Extracting Algorithm for the Axis of Area Elements Based on Constrained TIN

作　　者：曹文涛 何伟 

机构地区：[1]武汉市测绘研究院,湖北武汉430022

出　　处：《地理空间信息》2017年第11期107-108,111,共3页Geospatial Information

基　　金：精密工程与工业测量国家测绘地理信息局重点实验室开放基金资助项目(PF2015-6)

摘　　要：为了解决系列比例尺地形图缩编过程中面状要素变为线状要素的问题,综合考虑面状要素轮廓线的走向,先通过面要素构造约束TIN,再根据约束TIN的非约束边中线来提取面状要素中轴线,所得结果与面状要素分布走向相符,达到了较好的缩编效果。In order to solve the problem that area elements turned into linear elements, which was in the series scale topographic map downsizing process,considering the trend of area elements contour, this paper constructed the constrained TIN by area elements at first. And then, the paper extracted the axes of area elements according to the midlines of non-constrained edges in constrained TIN. The result matched the trend of area elements contour, which achieved better downsizing effect.

关 键 词：约束TIN 面状要素 中轴线 

分 类 号：P284[天文地球—地图制图学与地理信息工程]