/** * 地图坐标转换 google,baidu,gps * @author lw * @Time 2015年4月16日18:19:16 * * */public class CoordinateConversion { private static final double x_pi = 3.14159265358979324 * 3000.0 / 180.0; private static final double pi = 3.14159265358979324; private static final double a = 6378245.0; private static final double ee = 0.00669342162296594323; /** * gg_lat 纬度 * gg_lon 经度 * GCJ-02转换BD-09 * Google地图经纬度转百度地图经纬度 * */ public static Point google_bd_encrypt(double gg_lat, double gg_lon){ Point point=new Point(); double x = gg_lon, y = gg_lat; double z = Math.sqrt(x * x + y * y) + 0.00002 * Math.sin(y * x_pi); double theta = Math.atan2(y, x) + 0.000003 * Math.cos(x * x_pi); double bd_lon = z * Math.cos(theta) + 0.0065; double bd_lat = z * Math.sin(theta) + 0.006; point.setLat(bd_lat); point.setLng(bd_lon); return point; } /** * wgLat 纬度 * wgLon 经度 * BD-09转换GCJ-02 * 百度转google * */ public static Point bd_google_encrypt(double bd_lat, double bd_lon){ Point point=new Point(); double x = bd_lon - 0.0065, y = bd_lat - 0.006; double z = Math.sqrt(x * x + y * y) - 0.00002 * Math.sin(y * x_pi); double theta =Math.atan2(y, x) - 0.000003 * Math.cos(x * x_pi); double gg_lon = z * Math.cos(theta); double gg_lat = z * Math.sin(theta); point.setLat(gg_lat); point.setLng(gg_lon); return point; } /** * wgLat 纬度 * wgLon 经度 * WGS-84 到 GCJ-02 的转换（即 GPS 加偏） * */ public static Point wgs_gcj_encrypts(double wgLat, double wgLon) { Point point=new Point(); if (outOfChina(wgLat, wgLon)) { point.setLat(wgLat); point.setLng(wgLon); return point; } double dLat = transformLat(wgLon - 105.0, wgLat - 35.0); double dLon = transformLon(wgLon - 105.0, wgLat - 35.0); double radLat = wgLat / 180.0 * pi; double magic = Math.sin(radLat); magic = 1 - ee * magic * magic; double sqrtMagic = Math.sqrt(magic); dLat = (dLat * 180.0) / ((a * (1 - ee)) / (magic * sqrtMagic) * pi); dLon = (dLon * 180.0) / (a / sqrtMagic * Math.cos(radLat) * pi); double lat = wgLat + dLat; double lon = wgLon + dLon; point.setLat(lat); point.setLng(lon); return point; }非本人原创
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