com.geoway.mobile.projections

类 Projection

java.lang.Object

com.geoway.mobile.projections.Projection

直接已知子类:

EPSG3857, EPSG4326

public class Projection
extends java.lang.Object

所有的投影一个抽象基类。

字段概要

字段

限定符和类型	字段和说明
protected boolean	swigCMemOwn

构造器概要

构造器

构造器和说明
Projection(long cPtr, boolean cMemoryOwn)

方法概要

限定符和类型	方法和说明
void	delete()
boolean	equals(java.lang.Object obj) Checks if this object is equal to the specified object.
protected void	finalize()
double	fromInternalScale(double size) Converts internal size to meters at the equator.
MapPos	fromLatLong(double lat, double lng) Transforms a position given using latitutde-longitude coordinates from the WGS84 coordinate system to the coordinate system of this projection.
MapPos	fromWgs84(MapPos pos) Transforms a position from the WGS84 coordinate system to the coordinate system of this projection.
MapBounds	getBounds() 返回此投影的边界。
static long	getCPtr(Projection obj)
double	getLocalScale(MapPos pos) 返回指定位置的本地级别。
java.lang.String	getName() 获取投影名称，例如"EPSG:3857"
int	hashCode() Returns the hash value of this object.
boolean	isSupportWgs84()
void	setSupportWgs84(boolean bSupport)
static Projection	swigCreatePolymorphicInstance(long cPtr, boolean cMemoryOwn) Creates a polymorphic instance of the given native object.
java.lang.String	swigGetClassName() Returns the actual class name of this object.
java.lang.Object	swigGetDirectorObject() Returns the connected director object.
MapPos	toLatLong(double x, double y) Transforms a position from the coordinate system of this projection to the WGS84 coordinate system latitude-longitute coordinates.
MapPos	toWgs84(MapPos pos) Transforms a position from the coordinate system of this projection to the WGS84 coordinate system.

从类继承的方法 java.lang.Object

clone, getClass, notify, notifyAll, toString, wait, wait, wait

字段详细资料

swigCMemOwn

protected boolean swigCMemOwn

构造器详细资料

Projection

public Projection(long cPtr,
                  boolean cMemoryOwn)

方法详细资料

getCPtr

public static long getCPtr(Projection obj)

finalize

protected void finalize()

覆盖:

finalize 在类中 java.lang.Object

delete

public void delete()

swigCreatePolymorphicInstance

public static Projection swigCreatePolymorphicInstance(long cPtr,
                                                       boolean cMemoryOwn)

Creates a polymorphic instance of the given native object. This is used internally by the SDK.

参数:

cPtr - The native pointer of the instance.

cMemoryOwn - The ownership flag.

返回:

The created instance.

equals

public boolean equals(java.lang.Object obj)

Checks if this object is equal to the specified object.

覆盖:

equals 在类中 java.lang.Object

参数:

obj - The reference object.

返回:

True when objects are equal, false otherwise.

hashCode

public int hashCode()

Returns the hash value of this object.

覆盖:

hashCode 在类中 java.lang.Object

返回:

The hash value of this object.

getBounds

public MapBounds getBounds()

返回此投影的边界。

返回:

此投影的边界。

getLocalScale

public double getLocalScale(MapPos pos)

返回指定位置的本地级别。

参数:

pos - 在内部坐标系中的位置。

返回:

指定位置的本地级别。

fromInternalScale

public double fromInternalScale(double size)

Converts internal size to meters at the equator.

参数:

size - The size in the internal coordinate system.

返回:

The approximate size in meters at the equator.

fromWgs84

public MapPos fromWgs84(MapPos pos)

Transforms a position from the WGS84 coordinate system to the coordinate system of this projection.

参数:

pos - The position in the WGS84 coordinate system. It should be encoded as longitude-latitude.

返回:

The transformed position in the coordinate system of this projection.

toWgs84

public MapPos toWgs84(MapPos pos)

Transforms a position from the coordinate system of this projection to the WGS84 coordinate system.

参数:

pos - The position in the coordinate system of this projection.

返回:

The transformed position in the WGS84 coordinate system. It is given as longitude-latitude.

fromLatLong

public MapPos fromLatLong(double lat,
                          double lng)

Transforms a position given using latitutde-longitude coordinates from the WGS84 coordinate system to the coordinate system of this projection.

参数:

lat - The latitude in the WGS84 coordinate system. It should be in range -90..90.

lng - The longitude in the WGS84 coordinate system. It should be in range -180..180.

返回:

The transformed position in the coordinate system of this projection.

toLatLong

public MapPos toLatLong(double x,
                        double y)

Transforms a position from the coordinate system of this projection to the WGS84 coordinate system latitude-longitute coordinates.

参数:

x - The x position in the coordinate system of this projection.

y - The y position in the coordinate system of this projection.

返回:

The transformed position in the WGS84 coordinate system given as latitude-longitude.

getName

public java.lang.String getName()

获取投影名称，例如"EPSG:3857"

返回:

投影名称

setSupportWgs84

public void setSupportWgs84(boolean bSupport)

isSupportWgs84

public boolean isSupportWgs84()

swigGetClassName

public java.lang.String swigGetClassName()

Returns the actual class name of this object. This is used internally by the SDK.

返回:

The class name of this object.

swigGetDirectorObject

public java.lang.Object swigGetDirectorObject()

Returns the connected director object. This is used internally by the SDK.

返回:

The connected director object or null if director is not connected.