基于KML的任意范围DEM有效边界提取方法

A Method of DEM Effective Boundary Extraction in any Range Based on KML

线路工程航测获取的DEM成果一般依线路走向任意分幅,每幅DEM有效范围不规律,不便于存量DEM的查询与管理。本文从DEM数据格式特点出发,提出一种任意范围DEM有效边界提取方法并生成边界线KML文件,通过KML地图浏览软件可以直观高效、实用轻量化的管理DEM文件。

The DEM files obtained by line engineering aerial survey are generally arbitrarily divided according to the direction of the line,and the effective range of each DEM is irregular,so it’s not easy to query and manage the stock DEM files.This paper firstly analyzes the characteristics of DEM data format,and proposes a method of DEM effective boundary extraction,and lastly generates boundary line KML files.Through KML map browsing software,DEM files can be managed intuitively,efficiently,practically and lightly.