采用高斯投影实现AutoCAD地形图换带

Using Gauss projection to realize band change of AutoCAD topographic map

地形图高斯投影换带是工程项目勘测和施工过程中一项重要的工作,利用GIS软件可实现高斯投影换带,但无法解决任意高程面上的投影问题,而且在AutoCAD图与GIS图转换过程中容易出现图形信息的丢失。本文研究了3种常用的椭球膨胀高斯投影换带方法,并在AutoCAD平台中实现了DXF文件坐标直接修改法和图形实体位置属性修改法。通过工程实例表明,本文方法理论严密,投影转换结果准确,软件实用性强。

Gauss projection band changing of topographic map is an important work in the process of surveying and construction of engineering projects. It can be realized with the help of GIS software,but it is unable to solve the problem of projectionon arbitrary elevation plane.Moreover,it is easy to lose graphic information in the transformation of AutoCAD map and GIS map. In this paper,three common ellipsoid expansion Gauss projection band conversion methods are introduced, and DXF file coordinate direct modification method and graphic entity position attribute modification method are implemented on AutoCAD platform. The test results show that the method in this paper is rigorous in theory,the result of gauss projection band change is accurate and the software has strong practicability.