Package com.luciad.projection
Class TLcdMollweide
java.lang.Object
com.luciad.projection.ALcdProjection
com.luciad.projection.ALcdCylindrical
com.luciad.projection.TLcdMollweide
- All Implemented Interfaces:
ILcdCylindrical
,ILcdProjection
,ILcdPropertyChangeSource
,Serializable
,Cloneable
Mollweide projection.
Introduction
The Mollweide projection a projection of a map of the world on to an ellipse with lines of latitude represented by straight lines and meridians represented by equally spaced elliptical curves.
Properties
- Pseudo-cylindrical equal-area projection.
- The central meridian is shown as a straight line.
- 90th meridians are circular arcs and all other meridians are equally spaced elliptical arcs.
- Parallels are unequally spaced straight lines and are parallel to each other.
- The scale is
true
along the latitudes 40°44' north and south.
Example
Sample code
ILcdProjection projection =
new TLcdMollweide(0.0);
Implementation aspects
The equations of the TLcdMollweide cylindrical projection are taken from [Snyder1987].
- Since:
- V 3.0
- See Also:
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Field Summary
Fields inherited from class com.luciad.projection.ALcdProjection
fPropertyChangeDispatcher
Fields inherited from interface com.luciad.projection.ILcdProjection
EPSILON
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Constructor Summary
ConstructorDescriptionConstructs a Mollweide projection with the central meridian at 0.TLcdMollweide
(double aCentralMeridian) Constructs a Mollweide projection with a given central meridian. -
Method Summary
Modifier and TypeMethodDescriptiondouble[][]
boundaryLats
(double aLongitude) Default implementation.double[][]
boundaryLons
(double aLatitude) Default implementation.boolean
inLonLatBounds
(ILcdPoint aLLHP) Checks if anILcdPoint
is inside the valid area of geodetic coordinates of the projection.boolean
inWorldBoundsOnSphere
(ILcdPoint aXYPoint, double aRadius) Checks if aILcdPoint
is inside the valid cartesian area of the projection.boolean
If all geodetic coordinates (l ,j ) are projected (visible) by anILcdProjection
and all (x,y ) coordinates are bounded this istrue
.void
lonlatheight2worldOnSphereSFCT
(ILcdPoint aLLHP, double aRadius, ILcd2DEditablePoint aXYPointSFCT) Transforms anILcd2DEditablePoint
on a sphere into the cartesian coordinate system of the projection.toString()
Returns theString
representation of the Mollweide projection.void
world2DEditableBoundsOnSphereSFCT
(double aRadius, ILcd2DEditableBounds aWorldBounds) Sets theILcd2DEditableBounds
object to the bounds of the projection in world coordinates.void
world2lonlatOnSphereSFCT
(ILcdPoint aXYPoint, double aRadius, ILcd2DEditablePoint aLLPointSFCT) Transforms anILcdPoint
from the cartesian coordinate system of the projection into anILcd2DEditablePoint
onto a sphere.Methods inherited from class com.luciad.projection.ALcdCylindrical
calculateCachedValues, clone, equals, getCentralMeridian, getOrigin, hashCode, isContinuous, loadProperties, setCentralMeridian, writePropertiesSFCT
Methods inherited from class com.luciad.projection.ALcdProjection
addPropertyChangeListener, firePropertyChangeEvent, inWorldBoundsOnEllipsoid, lonlatheight2worldOnEllipsoidSFCT, removePropertyChangeListener, world2DEditableBoundsOnEllipsoidSFCT, world2lonlatOnEllipsoidSFCT
Methods inherited from class java.lang.Object
finalize, getClass, notify, notifyAll, wait, wait, wait
Methods inherited from interface com.luciad.projection.ILcdProjection
inWorldBoundsOnEllipsoid, lonlatheight2worldOnEllipsoidSFCT, world2DEditableBoundsOnEllipsoidSFCT, world2lonlatOnEllipsoidSFCT
Methods inherited from interface com.luciad.util.ILcdPropertyChangeSource
addPropertyChangeListener, removePropertyChangeListener
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Constructor Details
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TLcdMollweide
public TLcdMollweide()Constructs a Mollweide projection with the central meridian at 0. -
TLcdMollweide
public TLcdMollweide(double aCentralMeridian) Constructs a Mollweide projection with a given central meridian.- Parameters:
aCentralMeridian
- the central meridian for the Mollweide projection.
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Method Details
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isAllInBounds
public boolean isAllInBounds()Description copied from interface:ILcdProjection
If all geodetic coordinates (l ,j ) are projected (visible) by anILcdProjection
and all (x,y ) coordinates are bounded this istrue
. AllILcdProjection
objects have bounded (x,y ) coordinates because the projection is cut off if necessary.- Returns:
true
if all LonLatPoints are within the bounds of the projection,false
otherwise.
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lonlatheight2worldOnSphereSFCT
public void lonlatheight2worldOnSphereSFCT(ILcdPoint aLLHP, double aRadius, ILcd2DEditablePoint aXYPointSFCT) throws TLcdOutOfBoundsException Description copied from interface:ILcdProjection
Transforms anILcd2DEditablePoint
on a sphere into the cartesian coordinate system of the projection.- Parameters:
aLLHP
- point to be projected.aRadius
- radius of the sphere (meters).aXYPointSFCT
- projected point as side effect.- Throws:
TLcdOutOfBoundsException
- If theILcdPoint
aLLHP
is not within the valid area of the projection (visible area), then this exception is thrown.
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world2lonlatOnSphereSFCT
public void world2lonlatOnSphereSFCT(ILcdPoint aXYPoint, double aRadius, ILcd2DEditablePoint aLLPointSFCT) throws TLcdOutOfBoundsException Description copied from interface:ILcdProjection
Transforms anILcdPoint
from the cartesian coordinate system of the projection into anILcd2DEditablePoint
onto a sphere.- Parameters:
aXYPoint
- projected point for which the corresponding geodetic point is sought.aRadius
- radius of the sphere (meters).aLLPointSFCT
- resulting geodetic coordinate as side effect.- Throws:
TLcdOutOfBoundsException
- If theILcdPoint
aXYPoint
is not within the valid area of the projection (visible area), then this exception is thrown.
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inLonLatBounds
Description copied from interface:ILcdProjection
Checks if anILcdPoint
is inside the valid area of geodetic coordinates of the projection. The valid area is determined by the LonLatPoints that are visible and for which the corresponding cartesian coordinate is within the boundaries.- Parameters:
aLLHP
-ILcdPoint
to be checked upon.- Returns:
true
if valid,false
if invalid.
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inWorldBoundsOnSphere
Description copied from interface:ILcdProjection
Checks if aILcdPoint
is inside the valid cartesian area of the projection. The valid cartesian area is determined naturally by the projection bounds or by an artificial introduced boundary limit because some cartesian points are at infinity. The shape of the valid cartesian area is in many cases rectangular or circular although it might be more complex.- Parameters:
aXYPoint
- point to be checked upon.aRadius
- radius of the sphere.- Returns:
true
if valid,false
if invalid.
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world2DEditableBoundsOnSphereSFCT
Description copied from interface:ILcdProjection
Sets theILcd2DEditableBounds
object to the bounds of the projection in world coordinates.- Parameters:
aRadius
- radius of the sphere.aWorldBounds
- the bounds of the projection in world coordinates as side effect.
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boundaryLons
public double[][] boundaryLons(double aLatitude) Description copied from class:ALcdProjection
Default implementation. To be redefined for specific projections.- Specified by:
boundaryLons
in interfaceILcdProjection
- Overrides:
boundaryLons
in classALcdProjection
- Parameters:
aLatitude
- latitude in decimal degrees and -90.0 <=aLat
<= 90.0.- Returns:
- the array of pairs of longitudes[0] and longitudes[1], where the closed interval longitudes[0] -> longitudes[1] is in visible area and -180.0 <= lon[i] <= 180.0.
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boundaryLats
public double[][] boundaryLats(double aLongitude) Description copied from class:ALcdProjection
Default implementation. To be redefined for specific projections.- Specified by:
boundaryLats
in interfaceILcdProjection
- Overrides:
boundaryLats
in classALcdProjection
- Parameters:
aLongitude
- longitude in decimal degrees -180.0 <= lon <= 180.0 .- Returns:
- the array of pairs of latitudes lats[0] and lats[1], where the closed interval lats[0] -> lats[1] is in visible area and -90.0 <= lats[i] <= 90.0 .
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toString
Returns theString
representation of the Mollweide projection.- Specified by:
toString
in interfaceILcdProjection
- Overrides:
toString
in classObject
- Returns:
- the
String
representation of the Mollweide projection.
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