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获取AB连线与正北方向的角度求距离此点一定距离、一定夹角的点经纬度判断point点 在线段startPoint-etartPoint的左侧或者右侧米转换为弧度弧度转换为米
定义Point点
public class LatLngPoint {final static double RC 6378137;final static double RJ …目录
获取AB连线与正北方向的角度求距离此点一定距离、一定夹角的点经纬度判断point点 在线段startPoint-etartPoint的左侧或者右侧米转换为弧度弧度转换为米
定义Point点
public class LatLngPoint {final static double RC 6378137;final static double RJ RC;double longitude, latitude;double radLongitude, radLatitude;double Ec;double Ed;static final String LatLngPointString %.6f:%.6f;public LatLngPoint(double longitude, double latitude) {this.longitude longitude;this.latitude latitude;radLongitude this.longitude * Math.PI / 180.;radLatitude this.latitude * Math.PI / 180.;Ec RJ (RC - RJ) * (90. - latitude) / 90.;Ed Ec * Math.cos(radLatitude);}public String getString() {return String.format(LatLngPointString, longitude, latitude);}
}import com.vividsolutions.jts.algorithm.Angle;
import com.vividsolutions.jts.geom.Coordinate;
import org.locationtech.spatial4j.distance.DistanceUtils;import java.math.BigDecimal;public class LatLngAngleUtil {/*** 获取AB连线与正北方向的角度* * param startPoint* A点的经纬度* param endPoint* B点的经纬度* return AB连线与正北方向的角度0~360*/public static double getAngleByTwoPoint(LatLngPoint startPoint, LatLngPoint endPoint) {double dx (endPoint.radLongitude - startPoint.radLongitude) * startPoint.Ed;double dy (endPoint.radLatitude - startPoint.radLatitude) * startPoint.Ec;double angle 0.0;angle Math.atan(Math.abs(dx / dy)) * 180. / Math.PI;double dLo endPoint.longitude - startPoint.longitude;double dLa endPoint.latitude - startPoint.latitude;if (dLo 0 dLa 0) {angle (90. - angle) 90;} else if (dLo 0 dLa 0) {angle angle 180.;} else if (dLo 0 dLa 0) {angle (90. - angle) 270;}return angle;}/*** 求距离此点一定距离、一定夹角的点经纬度* * param distance* 两点之间的距离 单位 m* param angle* 两点连线与正北方向的夹角0~360* return 算出的点的经纬度*/public static LatLngPoint getLatLngPointByDistanceAndAngle(LatLngPoint startPoint,double distance, double angle) {double dx distance * Math.sin(Math.toRadians(angle));double dy distance * Math.cos(Math.toRadians(angle));double bjd new BigDecimal((dx / startPoint.Ed startPoint.radLongitude) * 180. / Math.PI).setScale(7, BigDecimal.ROUND_HALF_UP).doubleValue();double bwd new BigDecimal((dy / startPoint.Ec startPoint.radLatitude) * 180. / Math.PI).setScale(7, BigDecimal.ROUND_HALF_UP).doubleValue();return new LatLngPoint(bjd, bwd);}/*** 判断point点 在线段startPoint-etartPoint的左侧或者右侧* param point 需要判断的点* param startPoint 线段开始点* param endPoint 线段结束点* return 大于0为右侧小于0为左侧*/public static double isLeftOrRight(Coordinate point, Coordinate startPoint, Coordinate endPoint) {double angleLeft Angle.angleBetweenOriented(point,startPoint,endPoint);return angleLeft;}/*** 米转换为弧度* 弧度角度*PI/180* 弧长半径*弧度* 地球赤道半径6378137* param me* return*/public static double meToDegree(double me){double radius DistanceUtils.EARTH_MEAN_RADIUS_KM; //地球平均半径BigDecimal bigDecimalCm new BigDecimal(me);BigDecimal bigDecimalFM new BigDecimal(1000);double bufferDegree bigDecimalCm.divide(bigDecimalFM).doubleValue();double kmToDegree DistanceUtils.dist2Degrees(bufferDegree, radius);return kmToDegree;}/*** 弧度转换为米* 弧度角度*PI/180* 弧长半径*弧度* 地球赤道半径6378137* param degree* return*/public static double degreeToMe(double degree){return DistanceUtils.degrees2Dist(degree, DistanceUtils.EARTH_MEAN_RADIUS_KM) * 1000;}
