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从百度地图的js中获取到了一部分数据
"name":"多味小吃店(荣华东道)","overall_rating":"3.5","pc_bookable":0,"phone":"(021)62088786","poi_address":"上海长宁区荣华东道19弄1楼3号C室(近水城南路)","point":{"x":13514570.1,"y":3636377.2},"price":"40","service_rating":"3","shop_hours_flag":1,"tag":"美食,韩国料理,古北","wap_bookable":0},"src_name":"cater}
里面的point":{"x":13514570.1,"y":3636377.2}数据转换成坐标即是
121.39532, 31.19393
如何用python实现百度地图墨卡托坐标跟经纬度坐标互转?
最好是不用百度的API，直接计算
"name":"多味小吃店(荣华东道)","overall_rating":"3.5","pc_bookable":0,"phone":"(021)62088786","poi_address":"上海长宁区荣华东道19弄1楼3号C室(近水城南路)","point":{"x":13514570.1,"y":3636377.2},"price":"40","service_rating":"3","shop_hours_flag":1,"tag":"美食,韩国料理,古北","wap_bookable":0},"src_name":"cater}
里面的point":{"x":13514570.1,"y":3636377.2}数据转换成坐标即是
121.39532, 31.19393
如何用python实现百度地图墨卡托坐标跟经纬度坐标互转?
最好是不用百度的API，直接计算
 | 1 zavior Jan 1, 2014 其实。。这样转换违反国家相关法律 |
 | 4 dancingbear Jan 2, 2014 没有这样的逆向算法吧 |
 | 6 phyng Jan 2, 2014 import math mercator = {"x":13514570.1, "y":3636377.2} lOnlat= {} x = mercator['x']/ 20037508.3427892 * 180 y = mercator['y']/ 20037508.3427892 * 180 lonlat['x'] = x lonlat['y'] = 180 / math.pi * (2 * math.atan(math.exp(y * math.pi / 180)) - math.pi / 2) print lonlat 这样得到的结果是{'y': 31.027932178384102, 'x': 121.40344879134716} 有误差可能出在20037508.3427892以及math.pi 偏移问题不是指这个，偏移是实际坐标要经过我朝保密插件处理成假坐标，而墨卡托坐标跟经纬度坐标互转是有公开算法的对地球的不同表示。参考http://www.cnblogs.com/liongg/archive/2009/04/20/1439905.html http://bbs.esrichina-bj.cn/esri/viewthread.php?tid=78245 |
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