Extracting Chinese geographic data from Baidu Map API

In this article, we describe the two new commands cngcode and cnaddress, which can be used to link Chinese addresses to locations dened by their longitudes and latitudes through Baidu Map API v3.0 (http: // api.map. baidu.com), an online map and navigation system widely used in China. cngcode transfers Chinese addresses to locations, whereas cnaddress does the opposite. These two commands make it easier with Stata to deal with addresses and locations in China.

本文介绍两款全新命令cngcode与cnaddress，二者可借助国内广泛使用的在线地图与导航系统——百度地图API v3.0（Baidu Map API v3.0，接口地址：http://api.map.baidu.com），实现中国地址与经纬度定义的地理位置之间的关联匹配。其中cngcode可将中文地址转换为对应地理位置坐标，而cnaddress则实现反向功能，即从经纬度坐标还原为中文地址。这两款命令可简化Stata软件中中国地址与地理位置数据的处理流程。