shz.model

类 Sphere

java.lang.Object

shz.model.Sphere

public class Sphere
extends Object

球

字段概要

字段

限定符和类型	字段和说明
static double	CHINA_LATITUDE_DOWN 中国纬度下值
static double	CHINA_LATITUDE_UP 中国纬度上值
static double	CHINA_LONGITUDE_LEFT 中国经度左值
static double	CHINA_LONGITUDE_RIGHT 中国经度右值
static double	EARTH_RADIUS 地球半径
static double	RADIAN

构造器概要

构造器

构造器和说明
Sphere(double radius)

方法概要

限定符和类型	方法和说明
double	area(double[] xs, double[] ys, int scale) 计算多边形面积 对于球面N边形，所有角的和为S,球的半径为R，面积计算公式：(S−(N−2)∗Pi)∗R∗R
double	distance(double x1, double y1, double x2, double y2, int scale) 计算球面距离
static Sphere	earth()
static boolean	outOfChina(double lon, double lat)
Rectangle2D.Double	rectangle(double x, double y, double distance)
Rectangle2D.Double	rectangle(double x, double y, double distance, double lonDifferential, double latDifferential) 获取经纬度范围

从类继承的方法 java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

字段详细资料

EARTH_RADIUS

public static final double EARTH_RADIUS

地球半径

另请参阅:

常量字段值

RADIAN

public static final double RADIAN

另请参阅:

常量字段值

CHINA_LONGITUDE_LEFT

public static final double CHINA_LONGITUDE_LEFT

中国经度左值

另请参阅:

常量字段值

CHINA_LONGITUDE_RIGHT

public static final double CHINA_LONGITUDE_RIGHT

中国经度右值

另请参阅:

常量字段值

CHINA_LATITUDE_DOWN

public static final double CHINA_LATITUDE_DOWN

中国纬度下值

另请参阅:

常量字段值

CHINA_LATITUDE_UP

public static final double CHINA_LATITUDE_UP

中国纬度上值

另请参阅:

常量字段值

构造器详细资料

Sphere

public Sphere(double radius)

方法详细资料

earth

public static Sphere earth()

area

public final double area(double[] xs,
                         double[] ys,
                         int scale)

计算多边形面积

对于球面N边形，所有角的和为S,球的半径为R，面积计算公式：(S−(N−2)∗Pi)∗R∗R

distance

public final double distance(double x1,
                             double y1,
                             double x2,
                             double y2,
                             int scale)

计算球面距离

参数:

x1 - 经度1

y1 - 纬度1

x2 - 经度2

y2 - 纬度2

outOfChina

public static boolean outOfChina(double lon,
                                 double lat)

rectangle

public Rectangle2D.Double rectangle(double x,
                                    double y,
                                    double distance,
                                    double lonDifferential,
                                    double latDifferential)

获取经纬度范围

参数:

x - 目标点经度

y - 目标点纬度

distance - 距目标点距离(单位 m)

rectangle

public Rectangle2D.Double rectangle(double x,
                                    double y,
                                    double distance)