摘要： 传统获取带状目标数字高程模型(DEM)数据的包围盒方法存在效率低、数据下载量大的问题。为此,提出基于空间分析的平滑缓冲区DEM裁剪提取算法和基于矩形拼接的DEM裁剪拼接算法,利用空间分析和矩形拼接的优势,实现带状DEM数据高效、轻量级的提取。采用电力行业三维输电线路的DEM工程数据进行实验,结果表明,所提算法在提取效率、算法复杂度和提取结果的数据量方面,相比传统的包围盒方法均有显著优势。

关键词: 输电线路, 带状大目标, 数字高程模型裁剪, 空间分析法, 矩形拼接法

Abstract: Downloading the Digital Elevation Model(DEM) data of big band object through the traditional bounding box method has problems of low efficiency and large amounts of data download.In order to solve these problems,this paper proposes two algorithms to obtain DEM data along long route with spatial analysis and rectangular stitching.One is smooth buffer DEM clipping and extraction algorithm based on spatial analysis,and the other is DEM clipping and stitching algorithm based on rectangular stitching.The data of electric power transmission lines are used to test the algorithms,and the results show that the proposed algorithms have great improvement in both efficiency and effectiveness,compared with traditional bounding box method.

Key words: transmission lines, big banded object, Digital Elevation Model(DEM) clipping, spatial analysis method, rectangular stitching method

中图分类号: 

• TP391