摘要
地图投影是地理信息与测绘地理数据的基础框架,从地图的生产到使用,都离不开对地图的正确理解。然而传统的地图投影教学往往重理论、轻实践、重概念、轻方法,此外,由于地图球面数据数学表达与传统平面地图表达之间的差异和复杂投影计算问题,使得地图投影教学成为地图学教学中的重点和难点。本文在分析当前地图投影辅助教学软件需求的基础上,设计并开发了一套用于地图投影辅助教学软件。该软件收集了35种常用的地图投影,综合应用了GIS软件二次开发技术、渔网点生成和DEM内插技术,实现了地图的加载与漫游、投影间的转换、变形椭圆的生成、等变形线的生成以及显示特定地图投影简介等功能。该软件对地图投影理论教学与GIS软件开发的教学具有一定的参考价值。
Map projection is the fundamental framework for geographical information as well as the surveying and mapping of geographic data.Understanding map correctly is of great importance to the production and use of map.Nevertheless, the traditional map projection usually pays more attention to the theory and concept, and fails to give enough consideration to its practice and methods, furthermore, because of the difference between the mathematical expression of Spherical earth and the traditional planimetric map expression and the complexity of projection calculation, these made map projection the key and difficult issue in map teaching.Based on the analysis of current demand of map projection assisted teaching software, this paper designs and develops a set of map projection assisted teaching software.This software collected 35 kinds of map projection methods, combined with GIS secondary development technology, fishnet generation methods and DEM interpolation technique.The fundamental methods of this software include the adding and roaming of maps, transformation between different map projections, the generation of deformation ellipsoid, the generation of deformation lines, the introduction of specific map projection and so on.This software not only is helpful to the teaching of map projection theory, but also to GIS development.
作者
杨晓红
YANG Xiaohong(Anhui Province Fundamental Geomatics Center,Hefei 230031,China)
出处
《测绘与空间地理信息》
2019年第9期191-194,共4页
Geomatics & Spatial Information Technology
关键词
地图投影
辅助教学
GIS二次开发
变形椭圆
map projection
assisted teaching
GIS secondary development
deformation ellipsoid
