地图经纬网Delphi程序的实现  

Realization of Grid Lines of Longitude and Latitude Based on Delphi Language

作　　者：朱瑜馨[1] 张锦宗[1] 

机构地区：[1]聊城大学环境与规划学院

出　　处：《微型电脑应用》2007年第9期59-60,43,共3页Microcomputer Applications

摘　　要：20世纪80年代后,随着数字地图与地理信息系统(GIS)技术的发展与应用,侧重于空间信息表达的电子地图应运而生。本文以电子地图最基本的功能——绘制经纬图、图形放大、缩小等说明Delphi中面向对象模式程序的优势及Tcanvas对象类的强大功能。The technologies of digital maps and GIS have made great progress since 1980s.The applications and developments about the technologies have also led to the generation of electric maps,in which more spatial information was emphasized.By the demonstrations of elementary functions of electric maps such as drawing grid lines of longitude and latitude,and zooming in and zooming out pictures,you can understand the advantages of object-oriented models and the strong functions of Tcanvas class.

关 键 词：面向对象 DELPHI Tcanvas 

分 类 号：P283.7[天文地球—地图制图学与地理信息工程]