期刊信息
- 刊名： 河北师范大学学报（自然科学版）Journal of Hebei Normal University (Natural Science)
- 主办： 河北师范大学
- ISSN： 1000-5854
- CN： 13-1061/N
- 中国科技核心期刊
- 中国期刊方阵入选期刊
- 中国高校优秀科技期刊
- 华北优秀期刊
- 河北省优秀科技期刊
The Study on Quantitative Information Visualization of Thematic Map by Using Oblique Coordinate System
摘要/Abstract
信息可视化是提高专题地图展现力的重要手段.笔者引入斜角坐标系量化图形作为专题地图的表示方法,介绍了斜角坐标系图形的数学基础和展现方法,并抽象出一个基础菱形,由基础菱形组合构成各种组合图形.同时基于GIS软件MapInfo的MapBasic宏语言,设计了基础菱形标准过程,开发出具有单、双和多坐标系绘图功能的专题地图制图模块,并能进行图形排序和图形移动,实现了量化信息的斜角坐标系图形可视化,扩展了专题地图表现形式,最后以河北省1980—1998年间的一、二、三产业数据绘图进行实证.
A main way of improving the impressive force of thematic map is information visualization. The quantitative graph of oblique coordinate system is employed as an appoal of the thematic map. The mathematic base and expression way of the quantitative graph of oblique coordinate system are introduced. A basic rhombus is abstracted as an element of the combined graph. With variousformsof the basic rhombus combined qraphs can be made up of.Based on the MapBasic macro language of MapInfo,a standard sub of the basic rhombus is designed and the single coordinate system,double coordinate system and multi coordinate system models of thematic map are developed by calling the standard sub. In the program the quantitative graphs can be sorted automatically and moved by the mouse. These models realize the visualization of quantitative information using graphs of oblique coordinate system. As a result,these new graphs extend the expression way of thematic map. Finally it is validated by the data of Hebei Province daring 1980 — 1998.