Java WGS8、GCJ-02、BD-09 地图坐标转换工具类
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public class LonlatConver {
/*public static void main(String[] args) {
Double lat = 121.368383;
Double lon = 31.236216;
double[] doubleArr1 = wgs84_To_Gcj02(lat, lon);
System.out.println(doubleArr1[0] + "====" + doubleArr1[1]);
double[] doubleArr = gcj02_To_Bd09(doubleArr1[0], doubleArr1[1]);
//double[] doubleArr = gcj02_To_Bd09(lat, lon);
System.out.println(doubleArr[0] + "====" + doubleArr[1]);
}*/
/**
* a
*/
public final static double a = 6378245.0;
/**
* ee
*/
public final static double ee = 0.00669342162296594323;
//圆周率 GCJ_02_To_WGS_84
public final static double pi = 3.14159265358979324;
/**
* @param lon 经度
* @param lat 纬度
* @return
* @Description WGS84 to 火星坐标系 (GCJ-02)
*/
public static double[] wgs84_To_Gcj02(double lon, double lat) {
if (outOfChina(lat, lon)) {
return null;
}
double dLat = transformLat(lon - 105.0, lat - 35.0);
double dLon = transformLon(lon - 105.0, lat - 35.0);
double radLat = lat / 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 mgLat = lat + dLat;
double mgLon = lon + dLon;
return new double[]{mgLon, mgLat};
}
/**
* @param lon
* @param lat
* @return
* @Description 火星坐标系 (GCJ-02) to WGS84
*/
public static double[] gcj02_To_Wgs84(double lon, double lat) {
double[] gps = transform(lat, lon);
double lontitude = lon * 2 - gps[1];
double latitude = lat * 2 - gps[0];
return new double[]{lontitude, latitude};
}
/**
* @param gg_lon
* @param gg_lat
* @return
* @Description 火星坐标系 (GCJ-02) to 百度坐标系 (BD-09)
*/
public static double[] gcj02_To_Bd09(double gg_lon, double gg_lat) {
double x = gg_lon, y = gg_lat;
double z = Math.sqrt(x * x + y * y) + 0.00002 * Math.sin(y * pi);
double theta = Math.atan2(y, x) + 0.000003 * Math.cos(x * pi);
double bd_lon = z * Math.cos(theta) + 0.0065;
double bd_lat = z * Math.sin(theta) + 0.006;
return new double[]{bd_lon, bd_lat};
}
/**
* @param bd_lon
* @param bd_lat
* @return
* @Description 百度坐标系 (BD-09) to 火星坐标系 (GCJ-02)
*/
public static double[] bd09_To_Gcj02(double bd_lon, double bd_lat) {
double x = bd_lon - 0.0065, y = bd_lat - 0.006;
double z = Math.sqrt(x * x + y * y) - 0.00002 * Math.sin(y * pi);
double theta = Math.atan2(y, x) - 0.000003 * Math.cos(x * pi);
double gg_lon = z * Math.cos(theta);
double gg_lat = z * Math.sin(theta);
return new double[]{gg_lon, gg_lat};
}
/**
* @param bd_lat
* @param bd_lon
* @return
* @Description 百度坐标系 (BD-09) to WGS84
*/
public static double[] bd09_To_Wgs84(double bd_lon, double bd_lat) {
double[] gcj02 = LonlatConver.bd09_To_Gcj02(bd_lon, bd_lat);
double[] map84 = LonlatConver.gcj02_To_Wgs84(gcj02[0], gcj02[1]);
return map84;
}
/**
* @param lat
* @param lon
* @return
* @Description 判断是否在中国范围内
*/
public 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;
}
/**
* @param lat
* @param lon
* @return
* @Description transform
*/
private static double[] transform(double lat, double lon) {
if (outOfChina(lat, lon)) {
return new double[]{lat, lon};
}
double dLat = transformLat(lon - 105.0, lat - 35.0);
double dLon = transformLon(lon - 105.0, lat - 35.0);
double radLat = lat / 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 mgLat = lat + dLat;
double mgLon = lon + dLon;
return new double[]{mgLat, mgLon};
}
/**
* @param x
* @param y
* @return
* @Description transformLat
*/
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;
}
/**
* @param x
* @param y
* @return
* @Description transformLon
*/
public 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;
}
/**
* GPS经纬度转换为 度（3114.1717,12122.1067 → 121.37300779，31.23436014）
*
* @param dms 坐标
* @param type 坐标类型 E/N
* @return String 解析后的经纬度
*/
public static String gpsToWgs84(String dms, String type) {
if (dms == null || dms.equals("")) {
return "0.0";
}
double result = 0.0D;
String temp = "";
if (type.equals("E")) {//经度
String e1 = dms.substring(0, 3);//截取3位数字，经度共3位，最多180度
//经度是一伦敦为点作南北两极的线为0度,所有往西和往东各180度
String e2 = dms.substring(3, dms.length());//需要运算的小数
result = Double.parseDouble(e1);
/* System.out.println("e2===="+e2);
System.out.println("===="+Double.parseDouble(e2) / 60.0D);*/
result += (Double.parseDouble(e2) / 60.0D);
temp = String.valueOf(result);
if (temp.length() > 11) {
temp = e1 + temp.substring(temp.indexOf("."), 11);
}
} else if (type.equals("N")) { //纬度，纬度是以赤道为基准,相当于把地球分两半,两个半球面上的点和平面夹角0~90度
String n1 = dms.substring(0, 2);//截取2位，纬度共2位，最多90度
String n2 = dms.substring(2, dms.length());
result = Double.parseDouble(n1);
/* System.out.println("n2===="+n2);
System.out.println("===="+Double.parseDouble(n2) / 60.0D);*/
result += Double.parseDouble(n2) / 60.0D;
temp = String.valueOf(result);
if (temp.length() > 10) {
temp = n1 + temp.substring(temp.indexOf("."), 10);
}
}
return temp;
}
}
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