摘要
互联网地图的蓬勃发展为地理数据共享提供了可能。但是根据国家相关规定,互联网地图需要进行加密,而各产品地图间加密方式有所区别,所以互联网地图的数据共享需要解决坐标系统不一致的问题。据此,研究了互联网地图间坐标转换方法,针对互联网地图的加密特点提出在不同区域分别利用多项式拟合模型坐标转换的方法。以"天地图"和百度地图为例,比较了一阶多项式和二阶多项式两种坐标转换模型的均方根误差,本方法精度能达到6m,为在线地理信息数据采集提供了坐标转换方法参考。
The booming development of internet map provides the possibility for the sharing of geographic data.But according to relevant provisions of the state,the internet map needs to be encrypted,and the encryption between maps products are different,so the internet map data sharing needs to solve the inconsistent problem of coordinate system.For what,the method of coordinate conversion between internet maps is studied.Standing on encryption characteristics of internet map,the method of polynomial fitting model of coordinate transformation used in different regions is proposed.Taking the ＂world map＂and Baidu map as an example,comparing the first order polynomial and two order polynomial of two coordinate transformation model of the RMS error,the accuracy of this method can reach 6 m,which provides a reference for coordinate transformation of online geographic information data collection.
出处
《现代测绘》
2018年第1期19-22,共4页
Modern Surveying and Mapping
基金
国家重点研发计划资助项目(2016YFC0803103)
国家自然科学基金项目(41674008
41504032)
关键词
互联网地图
坐标转换
最小二乘
精度评定
internet maps
coordinate transformation
least squares
accuracy evaluation
