一种自动生成等高线的快速处理方法探讨

Discussion on a Fast Processing Method for Automatically Generating Contours

等高线是地形图的重要组成要素之一,在各类比例尺的地形图测绘生产中,等高线主要通过传统航测技术生产而来,虽然这种方式能够形象地反映和概括等高线形态,但是其往往费时费力且对作业人员经验和素质要求较高。本文采用DEM生成等高线的方式,结合不同地形类别,分别采用直接对DEM生成等高线和对DEM平滑后生成等高线两种方式获取等高线,再对等高线进行平滑简化、取舍删除的方式,获取不同地形类别DEM生成等高线最优方案,从而提高等高线的生产效率。

Contours is one of the important components of topographic map.In the production of topographic map surveying and mapping of various scales,contours is mainly produced by traditional aerial photogrammetry technology.Although this method can reflect and summarize the contour shape vividly,it is often time-consuming and laborious and requires high experience and quality of operators.This paper uses DEM to generate contours,combining different terrain categories,respectively adopt direct for DEM generation contour and for DEM generation after smooth contour to obtain contours in two ways,then smooth and simplify the contours,select and delete them,in order to obtain the optimal solution for generating contours using DEM for different terrain categories,so as to improve the production efficiency of contour.