交通要素启发式多尺度表达技术方法探讨

针对当前地图的单一尺度可视化与用户所需地图的多尺度表达之间的矛盾,利用多尺度制图技术,探讨基于用户制图需求的交通要素启发式多尺度表达的技术方法.通过对用户的制图需求信息进行启发式识别,提取出相应参数对不同尺度下各要素进行取舍和简化,最终实现交通要素的多尺度表达.实践表明,文中方法可以改善电子地图表达尺度单一的缺陷,满足用户对多尺度地图的制图需求.

Research of the technology and method of heuristics web map multi-scale representation

Aiming at the contradiction between visualization of sin gle scale maps and multi-scale representation of the maps that users demands,it uses a multi-scale mapping technology,and discusses the method of traffic elements heuristic multi-scale representation based on users＇ mapping demands.By a series of heuristic recognition process of users＇ mapping demands information,this method ranks the corresponding parameters to accept,reject and simplify all the elements in different scales.Finally it realizes the multi-scale representation of traffic elements.Practice shows that this method can ameliorate the sin gle scale flaws of web map representation,satisfy the demands of users to multi-scale web map.