See: Description
Class  Description 

AlbersEqualArea 
Albers Equal Area Projection (EPSG code 9822).

AlbersEqualArea.Provider 
The math transform
provider for an Albers Equal Area projection (EPSG code 9822).

AzimuthalEquidistant 
Azimuthal Equidistant projection.

AzimuthalEquidistant.Abstract 
Abstract base class for Azimuthal Equidistant projections.

AzimuthalEquidistant.Ellipsoidal 
Ellipsoidal Azimuthal Equidistant projection.

AzimuthalEquidistant.Provider 
Factory for creating Azimuthal Equidistant projections.

AzimuthalEquidistant.Spherical 
Spherical Azimuthal Equidistant projection.

CassiniSoldner 
CassiniSoldner Projection (EPSG code 9806).

CassiniSoldner.Provider 
The
MathTransformProvider
for a CassiniSoldner projection. 
CylindricalEqualArea  
CylindricalEqualArea.BehrmannProvider  
CylindricalEqualArea.LambertCylindricalEqualAreaProvider  
CylindricalEqualArea.Provider  
EckertIV 
Eckert IV projection

EckertIV.Provider 
The math transform
provider for the Eckert IV projection (not part of the EPSG database).

EquatorialOrthographic 
The equatorial case of the
Orthographic projection. 
EquatorialStereographic 
The USGS equatorial case of the stereographic projection.

EquidistantConic 
Equidistant Conic Projection.

EquidistantConic.Provider 
The math transform
provider for a EquidistantConic projection.

EquidistantCylindrical 
Equidistant cylindrical projection (EPSG code 9823).

EquidistantCylindrical.Provider 
The math transform
provider for an Equidistant Cylindrical projection
(EPSG code 9823).

EquidistantCylindrical.SphericalProvider 
The math transform
provider for an Equidistant Cylindrical projection,
spherical case

GeneralOblique 
General Oblique Transformation projection useful for rotated spherical coordinates ("Rotated Pole"),
commonly used in numerical weather forecasting models.

GeneralOblique.Provider 
The math transform provider for an
General Oblique Transformation projection.

GeostationarySatellite 
The Geostationary Satellite Projection
Adapted from https://github.com/OSGeo/proj.4/blob/4.9/src/PJ_geos.c
NOTE: Not all valid coordinates in this projection will transform to valid
terrestrial coordinates, this is especially true of "Full Disk" earth
coverages.

GeostationarySatellite.Ellipsoidal  
GeostationarySatellite.Provider  
GeostationarySatellite.Spherical  
Gnomonic 
The gnomonic projection using a spheroid algorithm.

Gnomonic.Provider 
The math transform
provider for a Gnomonic projection

HotineObliqueMercator 
Hotine Oblique Mercator projection.

HotineObliqueMercator.Provider 
The math transform
provider for a Hotine Oblique Mercator projection
(EPSG code 9812).

HotineObliqueMercator.Provider_TwoPoint 
The math transform
provider for a Hotine Oblique Mercator projection,
specified with two points on the central line (instead of a central point and azimuth).

Krovak 
Krovak Oblique Conformal Conic projection (EPSG code 9819).

Krovak.Provider 
The math transform
provider for an Krovak projection (EPSG code 9819).

LambertAzimuthalEqualArea 
Lambert Azimuthal Equal Area (EPSG code 9820).

LambertAzimuthalEqualArea.Provider 
The math transform
provider for an Lambert Equal Area projection
(EPSG code 9820).

LambertConformal 
Lambert Conical Conformal Projection.

LambertConformal1SP 
Lambert Conical Conformal 1SP Projection.

LambertConformal1SP.Provider 
The math transform
provider for a Lambert Conformal 1SP projection (EPSG
code 9801).

LambertConformal2SP 
Lambert Conical Conformal 2SP Projection.

LambertConformal2SP.Provider 
The math transform
provider for a Lambert Conformal 2SP projection (EPSG
code 9802).

LambertConformalBelgium 
Lambert Conical Conformal 2SP Belgium Projection.

LambertConformalBelgium.Provider 
The math transform
provider for a Lambert Conformal 2SP Belgium
projection (EPSG code 9803).

LambertConformalEsriProvider 
A specialized version

MapProjection 
Base class for transformation services between ellipsoidal and cartographic projections.

MapProjection.AbstractProvider 
The base provider for
MapProjection s. 
Mercator 
Mercator Cylindrical Projection.

Mercator1SP 
Mercator Cylindrical 1SP Projection.

Mercator1SP.Provider 
The math transform
provider for a Mercator 1SP projection (EPSG code 9804).

Mercator2SP 
Mercator Cylindrical 2SP Projection.

Mercator2SP.Provider 
The math transform
provider for a Mercator 2SP projection (EPSG code 9805).

MercatorPseudoProvider 
Supports the popular visualisation projection used by Google, Microsoft, Yahoo, OSM and others

MeteosatSG 
Meteosat Second Generation imagery projection
Conversion of image coordinates (pixel column and row) into the corresponding geographical coordinates (Latitude and Longitude) of all MSG
Satellites (Meteosat8, Meteosat9 and Meteosat10) Level 1.5 VIS/IR data.

MeteosatSG.Provider 
The math transform provider for an
Meteosat Second Generation image projection.

Mollweide 
Mollweide projection

Mollweide.MollweideProvider 
The math transform
provider for the Mollweide projection (not part of the EPSG database).

Mollweide.WagnerIVProvider 
The math transform
provider for the Wagner IV projection (not part of the EPSG database).

Mollweide.WagnerVProvider 
The math transform
provider for the Wagner V projection (not part of the EPSG database).

NewZealandMapGrid 
The NZMG (New Zealand Map Grid) projection.

NewZealandMapGrid.Provider 
The math transform
provider for New Zealand Map Grid (EPSG code 27200).

ObliqueMercator 
Oblique Mercator Projection.

ObliqueMercator.Provider 
The math transform
provider for an Oblique Mercator projection (EPSG code 9815).

ObliqueMercator.Provider_TwoPoint 
The math transform
provider for a Oblique Mercator projection, specified
with two points on the central line (instead of a central point and azimuth).

ObliqueOrthographic 
The oblique case of the
Orthographic projection. 
ObliqueStereographic 
Provides the transform equations for the Oblique Stereographic (EPSG code 9809).

ObliqueStereographic.Provider 
The math transform
provider for a stereographic projection of any kind.

Orthographic 
Orthographic Projection.

Orthographic.Provider 
The math transform
provider for a Orthographic projection.

PlateCarree 
Plate Carree (or Equirectangular) projection.

PlateCarree.Provider 
The math transform
provider for an Plate Carree projection.

PolarOrthographic 
The polar case of the
Orthographic projection. 
PolarStereographic 
The polar case of the stereographic projection.

PolarStereographic.ProviderA 
The math transform
provider for a Polar Stereographic projection.

PolarStereographic.ProviderB 
The math transform
provider for a Polar Stereographic (Variant B)
projection.

PolarStereographic.ProviderNorth 
The math transform
provider for a North Polar Stereographic projection.

PolarStereographic.ProviderSouth 
The math transform
provider for a South Polar Stereographic projection.

Polyconic 
Polyconic (American).

Polyconic.Provider 
The math transform
provider for a Mercator 1SP projection (EPSG code 9804).

Robinson 
Robinson projection

Robinson.Provider 
The math transform
provider for the Robinson projection (not part of the EPSG database).

RotatedPole 
Rotated Pole Transformation for rotated spherical coordinates ("Rotated Pole Coordinates"),
commonly used in numerical weather forecasting models.

RotatedPole.Provider 
The math transform provider for an
Rotated Pole projection.

Sinusoidal 
Sinusoidal (Sansonâ€“Flamsteed) projection

Sinusoidal.Provider 
The math transform
provider for the Sinusoidal projection (not part of the EPSG database).

Stereographic 
Stereographic Projection.

Stereographic.Provider 
The math transform
provider for a Stereographic projections using USGS equations.

TransverseMercator 
Transverse Mercator Projection (EPSG code 9807).

TransverseMercator.Provider 
The math transform
provider for a Transverse Mercator projection (EPSG code
9807).

TransverseMercator.Provider_SouthOrientated 
The math transform
provider for a South Orientated Transverse Mercator
projection (EPSG code 9808).

WinkelTripel 
Winkel Tripel and Hammer Aitoff projection
References:
http://en.wikipedia.org/wiki/Winkel_tripel_projection
http://en.wikipedia.org/wiki/Hammer_projection

WinkelTripel.AitoffProvider 
The math transform
provider for the Aitoff projection (not part of the EPSG database).

WinkelTripel.WinkelProvider 
The math transform
provider for the Winkle Tripel projection projection (not part of the EPSG database).

WorldVanDerGrintenI 
World Van der Grinten I projection.

WorldVanDerGrintenI.Provider 
Enum  Description 

AzimuthalEquidistant.Mode 
The four possible modes or aspects of the projection.

Exception  Description 

PointOutsideEnvelopeException 
Thrown by
MapProjection when a map projection failed because the point is
outside the envelope of validity. 
ProjectionException 
Thrown by
MapProjection when a map projection failed. 
MathTransformFactory
instead.
Many geographic coordinate reference systems use axis in (latitude,longitude) order, but not all. Axis order, orientation and units are CRSdependent. For example some CRS use longitude values increasing toward East, while some others use longitude values increasing toward West. The axis order must be specified in all CRS, and any method working with them should take their axis order and units in account.
However, map projections defined in this package are transformation steps, not final CRS. All projections defined in this package must complies with the OGC 01009 specification. This specification said (quoting section 10.6 at page 34):
Cartographic projection transforms are used by projected coordinate reference systems to map geographic coordinates (e.g. Longitude and Latitude) into (X,Y) coordinates. These (X,Y) coordinates can be imagined to lie on a plane, such as a paper map or a screen. All cartographic projection transforms will have the following properties:
 Converts from (Longitude, Latitude) coordinates to (X,Y).
 All angles are assumed to be decimal degrees, and all distances are assumed to be meters.
 The domain should be a subset of {[180,180)×(90,90)}.
Although all cartographic projection transforms must have the properties listed above, many projected coordinate reference systems have different properties. For example, in Europe some projected coordinate reference systems use grads instead of decimal degrees, and often the base geographic coordinate reference system is (Latitude, Longitude) instead of (Longitude, Latitude). This means that the cartographic projected transform is often used as a single step in a series of transforms, where the other steps change units and swap ordinates.
The Geotools implementation extends this rule to axis directions as well, i.e.
(X,Y) coordinates must be (East,
North) orientated. This rule implies a nonintuitive
behavior for the Transverse Mercator South Orientated projection, which still projects coordinates
with Y values increasing toward North. The real axis flip is performed by the rest of the CRS framework
upon coordinate system axis inspection. In order to
get a real South orientated projection, the cartographic transform must be concatenated with an affine transform.
This is done automatically if the projected CRS is created
with the Geotools's createProjectedCRS
convenience method with a South orientated coordinate system
in argument.
In order to reduce the risk of confusion, this package never defines south orientated
MapProjection
implementations. The providers always
create southorientated projections as a concatenation of their northorientated variants with an affine
transform. This approach removes all ambiguity when reading a transform in
Well
Known Text (WKT) format, since only the northorientated variant is used and the affine transform
coefficients tell exactly which axis flips are applied.
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