百度地图坐标转换
坐标实体类:
public class Point { private double lat;// 纬度 private double lng;// 经度 public Point() { } public Point(double lng, double lat) { this.lng = lng; this.lat = lat; } @Override public boolean equals(Object obj) { if (obj instanceof Point) { Point bmapPoint = (Point) obj; return (bmapPoint.getLng() == lng && bmapPoint.getLat() == lat) ? true : false; } else { return false; } } @Override public String toString() { return "Point [lat=" + lat + ", lng=" + lng + "]"; } public double getLat() { return lat; } public void setLat(double lat) { this.lat = lat; } public double getLng() { return lng; } public void setLng(double lng) { this.lng = lng; } }
坐标转换工具类
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; } public static void transform(double wgLat, double wgLon, double[] latlng) { if (outOfChina(wgLat, wgLon)) { latlng[0] = wgLat; latlng[1] = wgLon; return; } 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); latlng[0] = wgLat + dLat; latlng[1] = wgLon + dLon; } private static boolean outOfChina(double lat, double lon) { if (lon < 72.004 || lon > 137.8347) return true; if (lat < 0.8293 || lat > 55.8271) return true; return false; } private static double transformLat(double x, double y) { double ret = -100.0 + 2.0 * x + 3.0 * y + 0.2 * y * y + 0.1 * x * y + 0.2 * Math.sqrt(Math.abs(x)); ret += (20.0 * Math.sin(6.0 * x * pi) + 20.0 * Math.sin(2.0 * x * pi)) * 2.0 / 3.0; ret += (20.0 * Math.sin(y * pi) + 40.0 * Math.sin(y / 3.0 * pi)) * 2.0 / 3.0; ret += (160.0 * Math.sin(y / 12.0 * pi) + 320 * Math.sin(y * pi / 30.0)) * 2.0 / 3.0; return ret; } private static double transformLon(double x, double y) { double ret = 300.0 + x + 2.0 * y + 0.1 * x * x + 0.1 * x * y + 0.1 * Math.sqrt(Math.abs(x)); ret += (20.0 * Math.sin(6.0 * x * pi) + 20.0 * Math.sin(2.0 * x * pi)) * 2.0 / 3.0; ret += (20.0 * Math.sin(x * pi) + 40.0 * Math.sin(x / 3.0 * pi)) * 2.0 / 3.0; ret += (150.0 * Math.sin(x / 12.0 * pi) + 300.0 * Math.sin(x / 30.0 * pi)) * 2.0 / 3.0; return ret; }