一种基于RGB特征提取的电子地图载负量计算方法

A computational method of information load on electronic map based on RGB feature extraction

电子地图以灵活多变的显示形式,可以在不同比例尺下显示与地理环境有关的各种信息,且在一定限度内可进行无级显示。然而,在电子地图缩放过程中如果不对屏幕载负量加以控制,往往容易造成各要素互相挤压,但如果只是对屏幕载负量简单限制又满足不了用户多尺度的需求。因此,为了提高地图信息传输的有效性及可控性,文中提出基于RGB特征提取电子地图载负量的新的计算方法,并进行相关实验分析。

Electronic map displays in flexible ways,which can show various information related to geographical environment in the form of different plotting scales and stepless visions within a certain limitation.Elements tend to extrude if information load on screen is out of control during the process of scale,but simply limiting the information load can＇t fulfill users＇ requirement of multiscale.In order to improve the effectiveness and controllability of the transmission of cartographic information,a new computartional method of information load on electronic map based on RGB feature extraction is provided as well as some related analyses through experiment.