中小比例尺电子地图动态兰勃特投影算法  

Dynamic Lambert Projection Algorithm for Small and Medium Scale Electronic Map

作　　者：朱祥通 孙卡[1] ZHU Xiangtong;SUN Ka(School of Information Engineering,Nanchang Hangkong University,Nanchang 330063)

机构地区：[1]南昌航空大学信息工程学院,南昌330063

出　　处：《计算机与数字工程》2024年第12期3744-3749,共6页Computer & Digital Engineering

摘　　要：兰勃特投影是一种中小比例尺电子地图中常用的地图投影算法,在地图学中有着十分重要的作用。与其他任何的地图投影一样,兰勃特投影不可避免地会存在变形和误差。在标准纬线上进行投影后不会产生形变,但在其余部分会产生形变,距离标准纬线越远的部分形变程度越大。传统的电子地图通常使用静态兰勃特投影,当用户关注区域远离双标准纬线时地图形变过大,对电子地图产生较大的影响。针对这个问题,论文提出了一种动态的兰勃特投影算法。采用局部动态投影的思路,对用户关注区域动态地构造投影参数并实施投影,以减小兰伯特投影形变对中小比例尺电子地图的影响。经实验分析,与传统方法相比该方法有效地减小了兰伯特投影形变对中小比例尺电子地图的影响。Lambert projection is a common map projection algorithm in small and medium scale electronic maps,which plays a very important role in cartography.Like any other map projection,the Lambert projection is inevitably subject to distortion and er-ror.There will be no deformation after the projection on the standard latitude line,but there will be deformation in the rest parts,and the further the distance from the standard latitude line,the greater the deformation degree.Traditional electronic maps usually use static Lambert projection.When the user's focus area is far from the double standard latitude line,the map deformation is too large,which has a great influence on the electronic map.Aiming at this problem,this paper proposes a dynamic Lambert projection algorithm.In order to reduce the influence of Lambert projection deformation on small and medium scale electronic map,the projec-tion parameters are dynamically constructed and implemented in the area concerned by users.Experimental results show that com-pared with traditional methods,this method can effectively reduce the influence of Lambert projection deformation on small and me-dium scale electronic map.

关 键 词：等角投影 投影坐标 中小比例尺 电子地图 

分 类 号：TP301.6[自动化与计算机技术—计算机系统结构]