摘要
数字化地形图的自动缩编一直是测绘行业的一大难题。在测绘行业,全要素地形图的数字化工作开展得较早,其数据结构较简单,本文以上海市1:500数字化地形图缩编1:2000地形图为例,利用AutoCAD的二次开发语言,对其数据结构中的一些特殊性加以判断及识别,编制了一套可半自动缩编的程序,大大提高了缩编效率,同时也为其以后向GIS数据格式转换迈进了一大步。
The auto micro-editing of digital topography is a difficult problem for the surveying and mapping firm, the digitizing of full-factor topography is developed early, its data structure is simple. Being a example, the digital topography in scale 1:500 of ShangHai city is micro-edited to the digital topography in scale 1:2000. through judging some particularity of its data structure, a set of semi-auto editing program is made with the redeveloping language of AutoCAD , which can raise micro-editing efficiency and is helpful to transform to GIS data type.
出处
《江苏测绘》
2000年第2期38-41,共4页
Jiangsu Surveying and Mapping
关键词
地图缩编
大比例尺
数字化
地形图
topography micro-editing object group character value program judge auto transform
