mars < --- > earth transform

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import frey.itn.api.core.Coordinate;/** * 地球坐标系 (WGS-84) 到火星坐标系 (GCJ-02) 的转换算法 . *  * @author Administrator *  */public class EvilTransform {private static double pi = 3.14159265358979324;private static double a = 6378245.0;private static double ee = 0.00669342162296594323;// World Geodetic System ==> Mars Geodetic Systempublic static Coordinate transform(double wgLon, double wgLat) {Coordinate nate = new Coordinate();if (outOfChina(wgLat, wgLon)) {nate.setX(wgLat);nate.setY(wgLon);return nate;}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);//System.out.println("Coordinate.transform:" + (wgLat + dLat) + ","+ (wgLon + dLon));nate.setX(wgLat + dLat);nate.setY(wgLon + dLon);return nate;}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;}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;}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;}/** * 火星 转 地球 * @param lat * @param lng * @return */static Coordinate transformRevers(double lat,double lng){Coordinate cod =transform(lng,lat);double g_lat = cod.getX();double g_lng = cod.getY();double d_lat  =g_lat-lat;double d_lng = g_lng-lng;Coordinate cad =new Coordinate();cad.setX(lat-d_lat);cad.setY(lng-d_lng);return cad;}public static void main(String[] args) {// TODO Auto-generated method stubtransform(41.80110, 123.4014320);}}
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