GPS 经纬度转换为 经过旋转后的平面坐标

/**
 * 地图工具
 * 
 * @author dxm
 * 
 */
public class MapUtil {

	// 参考点
	private double[] d34 = null;
	private double[] d33 = null;
	private double[] gs34 = null;
	private double[] gs33 = null;

	// 参考点位置
	private double x34, y34;

	// 计算参数
	private double a, b, c, bl;

	/**
	 * 构造器
	 * 
	 * @param ds34 参考点经纬度
	 * @param ds33 参考点经纬度
	 * @param length 两个参考点在本坐标系长度
	 */
	public MapUtil(String[] ds34, String[] ds33, double x34, double y34, double length) {

		this.x34 = x34;
		this.y34 = y34;

		d34 = convertGPS(ds34[0], ds34[1]);
		d33 = convertGPS(ds33[0], ds33[1]);
		gs34 = BLToGauss(d34[0], d34[1]);
		gs33 = BLToGauss(d33[0], d33[1]);

		// 点33到点34的高斯横向距离
		a = gs34[0] - gs33[0];

		// 点33到点34的高斯纵向距离
		b = gs34[1] - gs33[1];

		// 点33到点34的高斯直线距离
		c = Math.sqrt(a * a + b * b);

		// 高斯距离与本坐标系的比例
		bl = length / c;
	}

	/**
	 * 根据经纬度算XY
	 * 
	 * @param lng
	 * @param lat
	 * @return
	 */
	public int[] getXY(double lng, double lat) {

		// 与参考点比较经度计算坐标
		if (lng > d34[0]) {
			return getXY1(lng, lat);
		} else {
			return getXY2(lng, lat);
		}
	}

	/**
	 * 已有定点为基准算XY坐标
	 */
	private int[] getXY1(double lng, double lat) {

		// 将经纬度转换为高斯投影坐标
		double[] gs = BLToGauss(lng, lat);

		// 与点34的横向高斯距离
		double d = Math.abs(gs[0] - gs34[0]);

		double e = d * c / b;

		double f = a * e / c;

		// 与点34的纵向高斯距离
		double gf = Math.abs(gs[1] - gs34[1]);

		double g = gf - f;

		double h = a * g / c;

		double i = b * g / c;

		double x = x34 - i * bl;
		double y = y34 + (h + e) * bl;
		return new int[] { (int) Math.rint(x), (int) Math.rint(y) };
	}

	/**
	 * 已有定点为基准算XY坐标
	 */
	private int[] getXY2(double lng, double lat) {

		// 将经纬度转换为高斯投影坐标
		double[] gs = BLToGauss(lng, lat);

		// 与点34的横向高斯距离
		double d = Math.abs(gs[0] - gs34[0]);

		double e = d * c / a;

		double f = e * b / c;

		// 与点34的纵向高斯距离
		double gf = Math.abs(gs[1] - gs34[1]);

		double g = gf - f;

		double h = a * g / c;

		double i = b * g / c;

		double x = x34 - (e + i) * bl;
		double y = y34 + h * bl;
		return new int[] { (int) Math.rint(x), (int) Math.rint(y) };
	}

	/**
	 * 经纬度度分秒转带小数点的度
	 * 
	 * @param jw
	 * @return
	 */
	private double[] convertGPS(String lng, String lat) {

		lng = lng.replaceAll("N", "");
		lng = lng.replaceAll("S", "");
		lng = lng.replaceAll("E", "");
		lng = lng.replaceAll("W", "");

		lat = lat.replaceAll("N", "");
		lat = lat.replaceAll("S", "");
		lat = lat.replaceAll("E", "");
		lat = lat.replaceAll("W", "");

		double lngD = 0;
		String[] fs = lng.split("°");
		if (fs.length > 0) {
			lngD = Double.parseDouble(fs[0]);
		}

		fs = fs[1].split("′");
		if (fs.length > 0) {
			double fen = Double.parseDouble(fs[0]);
			fen = fen / 60;
			lngD += fen;
		}

		fs = fs[1].split("″");
		if (fs.length > 0) {
			double mi = Double.parseDouble(fs[0]);
			mi = mi / (60 * 60);
			lngD += mi;
		}

		double latD = 0;
		fs = lat.split("°");
		if (fs.length > 0) {
			latD = Double.parseDouble(fs[0]);
		}

		fs = fs[1].split("′");
		if (fs.length > 0) {
			double fen = Double.parseDouble(fs[0]);
			fen = fen / 60;
			latD += fen;
		}

		fs = fs[1].split("″");
		if (fs.length > 0) {
			double mi = Double.parseDouble(fs[0]);
			mi = mi / (60 * 60);
			latD += mi;
		}

		return new double[] { lngD, latD };
	}

	/**
	 * 由高斯投影坐标反算成经纬度
	 * 
	 * @param X
	 * @param Y
	 * @return
	 */
	@SuppressWarnings("unused")
	private double[] GaussToBL(double X, double Y) {

		int ProjNo;
		int ZoneWide; // //带宽
		double[] output = new double[2];
		double longitude1, latitude1, longitude0, X0, Y0, xval, yval;// latitude0,
		double e1, e2, f, a, ee, NN, T, C, M, D, R, u, fai, iPI;
		iPI = 0.0174532925199433; // //3.1415926535898/180.0;
		// a = 6378245.0; f = 1.0/298.3; //54年北京坐标系参数
		a = 6378140.0;
		f = 1 / 298.257; // 80年西安坐标系参数
		ZoneWide = 6; // //6度带宽
		ProjNo = (int) (X / 1000000L); // 查找带号
		longitude0 = (ProjNo - 1) * ZoneWide + ZoneWide / 2;
		longitude0 = longitude0 * iPI; // 中央经线

		X0 = ProjNo * 1000000L + 500000L;
		Y0 = 0;
		xval = X - X0;
		yval = Y - Y0; // 带内大地坐标
		e2 = 2 * f - f * f;
		e1 = (1.0 - Math.sqrt(1 - e2)) / (1.0 + Math.sqrt(1 - e2));
		ee = e2 / (1 - e2);
		M = yval;
		u = M / (a * (1 - e2 / 4 - 3 * e2 * e2 / 64 - 5 * e2 * e2 * e2 / 256));
		fai = u + (3 * e1 / 2 - 27 * e1 * e1 * e1 / 32) * Math.sin(2 * u) + (21 * e1 * e1 / 16 - 55 * e1 * e1 * e1 * e1 / 32) * Math.sin(4 * u) + (151 * e1 * e1 * e1 / 96) * Math.sin(6 * u) + (1097 * e1 * e1 * e1 * e1 / 512) * Math.sin(8 * u);
		C = ee * Math.cos(fai) * Math.cos(fai);
		T = Math.tan(fai) * Math.tan(fai);
		NN = a / Math.sqrt(1.0 - e2 * Math.sin(fai) * Math.sin(fai));
		R = a * (1 - e2) / Math.sqrt((1 - e2 * Math.sin(fai) * Math.sin(fai)) * (1 - e2 * Math.sin(fai) * Math.sin(fai)) * (1 - e2 * Math.sin(fai) * Math.sin(fai)));
		D = xval / NN;
		// 计算经度(Longitude) 纬度(Latitude)
		longitude1 = longitude0 + (D - (1 + 2 * T + C) * D * D * D / 6 + (5 - 2 * C + 28 * T - 3 * C * C + 8 * ee + 24 * T * T) * D * D * D * D * D / 120) / Math.cos(fai);
		latitude1 = fai - (NN * Math.tan(fai) / R) * (D * D / 2 - (5 + 3 * T + 10 * C - 4 * C * C - 9 * ee) * D * D * D * D / 24 + (61 + 90 * T + 298 * C + 45 * T * T - 256 * ee - 3 * C * C) * D * D * D * D * D * D / 720);
		// 转换为度 DD
		output[0] = longitude1 / iPI;
		output[1] = latitude1 / iPI;
		return output;
	}

	/**
	 * 由经纬度反算成高斯投影坐标
	 * 
	 * @param longitude
	 * @param latitude
	 */
	private double[] BLToGauss(double longitude, double latitude) {

		int ProjNo = 0;

		// 带宽
		int ZoneWide = 6;

		double longitude1, latitude1, longitude0, X0, Y0, xval, yval;
		double a, f, e2, ee, NN, T, C, A, M, iPI;

		// 3.1415926535898/180.0;
		iPI = 0.0174532925199433;

		// 54年北京坐标系参数
		a = 6378245.0;
		f = 1.0 / 298.3;

		// 80年西安坐标系参数
		// a=6378140.0;
		// f=1/298.257;

		ProjNo = (int) (longitude / ZoneWide);
		longitude0 = ProjNo * ZoneWide + ZoneWide / 2;
		longitude0 = longitude0 * iPI;

		// 经度转换为弧度
		longitude1 = longitude * iPI;

		// 纬度转换为弧度
		latitude1 = latitude * iPI;

		e2 = 2 * f - f * f;
		ee = e2 * (1.0 - e2);
		NN = a / Math.sqrt(1.0 - e2 * Math.sin(latitude1) * Math.sin(latitude1));
		T = Math.tan(latitude1) * Math.tan(latitude1);
		C = ee * Math.cos(latitude1) * Math.cos(latitude1);
		A = (longitude1 - longitude0) * Math.cos(latitude1);
		M = a * ((1 - e2 / 4 - 3 * e2 * e2 / 64 - 5 * e2 * e2 * e2 / 256) * latitude1 - (3 * e2 / 8 + 3 * e2 * e2 / 32 + 45 * e2 * e2 * e2 / 1024) * Math.sin(2 * latitude1) + (15 * e2 * e2 / 256 + 45 * e2 * e2 * e2 / 1024) * Math.sin(4 * latitude1) - (35 * e2 * e2 * e2 / 3072) * Math.sin(6 * latitude1));
		xval = NN * (A + (1 - T + C) * A * A * A / 6 + (5 - 18 * T + T * T + 72 * C - 58 * ee) * A * A * A * A * A / 120);
		yval = M + NN * Math.tan(latitude1) * (A * A / 2 + (5 - T + 9 * C + 4 * C * C) * A * A * A * A / 24 + (61 - 58 * T + T * T + 600 * C - 330 * ee) * A * A * A * A * A * A / 720);
		X0 = 1000000L * (ProjNo + 1) + 500000L;
		Y0 = 0;
		xval = xval + X0;
		yval = yval + Y0;
		return new double[] { xval, yval };
	}

}