在Java中将公共类转换为抽象类
我几乎不熟悉Java编程。我想在MATSim中实现以下代码(这是一个用于城市规划目的的模拟程序)。此代码是关于将WGS84(经度和纬度)转换为OSGB36(英国国家电网)的代码 MATSim库有一个接口(如下所示),用于将转换代码放入其中,并将其用于视觉模拟 我已经尝试过很多次处理错误,但都不管用。你能告诉我怎么做吗在Java中将公共类转换为抽象类,java,interface,abstract-class,Java,Interface,Abstract Class,我几乎不熟悉Java编程。我想在MATSim中实现以下代码(这是一个用于城市规划目的的模拟程序)。此代码是关于将WGS84(经度和纬度)转换为OSGB36(英国国家电网)的代码 MATSim库有一个接口(如下所示),用于将转换代码放入其中,并将其用于视觉模拟 我已经尝试过很多次处理错误,但都不管用。你能告诉我怎么做吗 package org.matsim.core.utils.geometry; import org.matsim.api.core.v01.Coord; /** * A
package org.matsim.core.utils.geometry;
import org.matsim.api.core.v01.Coord;
/**
* A simple interface to convert coordinates from one coordinate system to
* another one.
*
* @author mrieser
*/
public interface CoordinateTransformation {
/**
* Transforms the given coordinate from one coordinate system to the other.
*
* @param coord The coordinate to transform.
* @return The transformed coordinate.
*/
public Coord transform(Coord coord);
}
谢谢你,索马耶
好的,错误在这里:
我做了以下工作:
它给了我两个语法错误:
双[]东和北(双lat,双lon){表示圆括号和逗号;
及
返回新的双精度(OSGB36N,OSGB36E);双精度
package org.matsim.core.utils.geometry.transformations;
import org.matsim.api.core.v01.Coord;
import org.matsim.core.utils.geometry.CoordImpl;
import org.matsim.core.utils.geometry.CoordinateTransformation;
public class WGS84toOSGB36 implements CoordinateTransformation {
@Override
public Coord transform(Coord coord) {
// WGS84 ELLIPSOID
double WGS84_A = 6378137;
double WGS84_B = 6356752.314245;
double WGS84_E2 = ((WGS84_A * WGS84_A) - (WGS84_B * WGS84_B) / (WGS84_A * WGS84_A));
// NstGrid scale factor on central meridian
final double F0 = 0.9996012717;
// Airy 1830 major & minor semi-axes - note .909 not .910
final double AIRY_A = 6377563.396;
final double AIRY_B = 6356256.909;
// NatGrid true origin
final double LAT0 = Math.toRadians(49); //Phi0
final double LON0 = Math.toRadians(-2); //Lamda0
// northing & easting of true origin, metres
final double N0 = -100000;
final double E0 = 400000;
// eccentricity squared
final double E2 = ((AIRY_A * AIRY_A) - (AIRY_B * AIRY_B)) / (AIRY_A *AIRY_A);
final double N = (AIRY_A - AIRY_B) / (AIRY_A + AIRY_B);
final double N2 = N * N;
final double N3 = N * N * N;
final double TX = -446.448;
final double TY = 125.157;
final double TZ = -542.060;
final double RX = Math.toRadians(-0.1502 / 3600);
final double RY = Math.toRadians(-0.2470 / 3600);
final double RZ = Math.toRadians(-0.8421 / 3600);
final double S = 20.4894 / 1e6 + 1;
/*----*/double[] eastANDnorth(double lat, double lon) {/* error in this line */
// -- 1: convert polar to cartesian coordinates (using ellipse 1)
// WGS84 ellipsoid
double sinPhi = Math.sin(lat);
double cosPhi = Math.cos(lat);
double sinLambda = Math.sin(lon);
double cosLambda = Math.cos(lon);
double H = 24.7; // for the moment
double nu = WGS84_A / Math.sqrt(1 - WGS84_E2 * sinPhi * sinPhi);
double x1 = (nu + H) * cosPhi * cosLambda;
double y1 = (nu + H) * cosPhi * sinLambda;
double z1 = ((1-WGS84_E2) * nu + H) * sinPhi;
// -- 2: apply helmert transform using appropriate params
double x2 = TX + x1 * S - y1 * RZ + z1 * RY;
double y2 = TY + x1 * RZ + y1 * S - z1 * RX;
double z2 = TZ - x1 * RY + y1 * RX + z1 * S;
// -- 3: convert cartesian to polar coordinates (using ellipse 2)
double precision = 4 / AIRY_A;
double p = Math.sqrt(x2 * x2 + y2 * y2);
double phi = Math.atan2(z2, p * (1 - E2)), phiP = 2 * Math.PI;
while (Math.abs(phi - phiP) > precision) {
nu = AIRY_A / Math.sqrt(1 - E2 * Math.sin(phi) * Math.sin(phi));
phiP = phi;
phi = Math.atan2(z2 + E2 * nu * Math.sin(phi), p);
}
double lambda = Math.atan2(y2, x2);
// -- 4: now we're in OSGB, get the EN coords
double cosLat = Math.cos(phi), sinLat = Math.sin(phi);
nu = AIRY_A * F0 / Math.sqrt(1 - E2 * sinLat * sinLat);
double rho = AIRY_A * F0 * (1 - E2) / Math.pow(1 - E2 * sinLat * sinLat, 1.5);
double eta2 = nu / rho - 1;
double Ma = (1 + N + (5 / 4) * N2 + (5 / 4) * N3) * (phi - LAT0);
double Mb = (3 * N + 3 * N * N + (21 / 8) * N3) * Math.sin(phi - LAT0) * Math.cos(phi + LAT0);
double Mc = ((15 / 8) * N2 + (15 / 8) * N3) * Math.sin(2 * (phi - LAT0)) * Math.cos(2 * (phi + LAT0));
double Md = (35 / 24) * N3 * Math.sin(3 * (phi - LAT0)) * Math.cos(3 * (phi + LAT0));
double M = AIRY_B * F0 * (Ma - Mb + Mc - Md); // meridional arc
double cos3lat = cosLat * cosLat * cosLat;
double cos5lat = cos3lat * cosLat * cosLat;
double tan2lat = Math.tan(phi) * Math.tan(phi);
double tan4lat = tan2lat * tan2lat;
double I = M + N0;
double II = (nu / 2) * sinLat * cosLat;
double III = (nu / 24) * sinLat * cos3lat * (5 - tan2lat + 9 * eta2);
double IIIA = (nu / 720) * sinLat * cos5lat * (61 - 58 * tan2lat + tan4lat);
double IV = nu * cosLat;
double V = (nu / 6) * cos3lat * (nu / rho - tan2lat);
double VI = (nu / 120) * cos5lat * (5 - 18 * tan2lat + tan4lat + 14 * eta2 - 58 * tan2lat * eta2);
double dLon = lambda - LON0;
double dLon2 = dLon * dLon, dLon3 = dLon2 * dLon, dLon4 = dLon3 * dLon, dLon5 = dLon4 * dLon, dLon6 = dLon5 * dLon;
double OSGB36N = I + II * dLon2 + III * dLon4 + IIIA * dLon6;
double OSGB36E = E0 + IV * dLon + V * dLon3 + VI * dLon5;
/*--------*/return new double(OSGB36N, OSGB36E);/* error in this line */
}
return new CoordImpl(OSGB36N, OSGB36E);
}
}
您正在尝试使用以下表达式创建数组:
new double(OSGB36N, OSGB36E)
但是,这是无效的java语法。您应该将其更改为
new double[]{ OSGB36N, OSGB36E }
您还试图在另一个方法中声明一个方法,即
eastANDnorth
insidetransform
,这在java中无效。您的公共类在哪里?不清楚您试图做什么,以及“实现以下代码”是什么应该是指,你取得了什么进步,或者出了什么问题。这只是一个接口。你需要一个接口的实现类。不确定MATsim如何工作,但通常应该有一个提供者来实现这个接口。这个代码中有什么问题或者出了什么问题?你为什么定义一个方法在另一种方法的中间?谢谢你的建议,Fabian,我可以解决我的问题。我把双数组改成:双LAT1= COORD。GETX();双LAT=数学。TrADADIANS(LAT1);双Lun1= COORD。GETYY();双Lon = Maul.TrurADIANS(LUN1)。;你是最有用的。-索马耶希也请记住你为我的未来详细阐述问题的技巧。谢谢你对我的耐心。索马耶希