Class  Description 

AbridgedMolodensky 
The provider for "Abridged Molodensky transformation" (EPSG:9605).

Affine 
The provider for "Affine general parametric transformation" (EPSG:9624).

AlbersEqualArea 
The provider for "Albers Equal Area" projection (EPSG:9822).

CassiniSoldner 
The provider for "CassiniSoldner" projection (EPSG:9806).

CoordinateFrameRotation 
The provider for "Coordinate Frame Rotation" (EPSG:9607).

EllipsoidToGeocentric 
The provider for "Geographic/geocentric conversions" (EPSG:9602).

EllipsoidToGeoid 
The provider for "Ellipsoid to Geoid" vertical transformation.

EquidistantCylindrical 
The provider for "Equidistant Cylindrical" projection
(EPSG:1028, EPSG:1029,

Exponential 
The provider for
ExponentialTransform1D 
GeocentricToEllipsoid 
The provider for "Geographic/geocentric conversions" (EPSG:9602).

GeocentricTranslation 
The provider for "Geocentric translation" (EPSG:9603).

HotineObliqueMercator 
The provider for "Hotine Oblique Mercator" projection (EPSG:9812).

HotineObliqueMercator.TwoPoint 
The provider for "Hotine Oblique Mercator" projection specified by two points
on the central line.

Krovak 
The provider for "Krovak Oblique Conic Conformal" projection (EPSG:9819).

LambertAzimuthalEqualArea 
The provider for "Lambert Azimuthal Equal Area" projection (EPSG:9820, EPSG:1027,

LambertConformal1SP 
The provider for "Lambert Conic Conformal (1SP)" projection (EPSG:9801).

LambertConformal2SP 
The provider for "Lambert Conic Conformal (2SP)" projection (EPSG:9802).

LambertConformal2SP.Belgium 
The provider for "Lambert Conic Conformal (2SP Belgium)" projection (EPSG:9803).

Logarithmic 
The provider for
LogarithmicTransform1D 
LongitudeRotation 
The provider for "Longitude rotation" (EPSG:9601)

MapProjection 
The base provider for map projections.

Mercator1SP 
The provider for "Mercator (variant A)" projection (EPSG:9804, EPSG:1026,

Mercator2SP 
The provider for "Mercator (2SP)" projection (EPSG:9805).

MillerCylindrical 
The provider for "Miller" projection.

Molodensky 
The provider for "Molodensky transformation" (EPSG:9604).

NADCON 
The provider for "North American Datum Conversion" (EPSG:9613).

NewZealandMapGrid 
The provider for "New Zealand Map Grid" (EPSG:9811).

NTv2 
The provider for "National Transformation" version 2 (ESPG:9615).

ObliqueMercator 
The provider for "Oblique Mercator" projection (EPSG:9815).

ObliqueMercator.TwoPoint 
The provider for "Oblique Mercator" projection specified by two points
on the central line.

ObliqueStereographic 
The provider for "Oblique Stereographic" projection using EPSG equations (EPSG:9809).

Orthographic 
The provider for "Orthographic" projection.

PlateCarree 
The provider for "Plate CarrĂ©e" projection.

PolarStereographic 
The provider for "Polar Stereographic (Variant A)" projection (EPSG:9810).

PolarStereographic.North 
The provider for "North Polar Stereographic" projection.

PolarStereographic.South 
The Provider for "South Polar Stereographic" projection.

PolarStereographic.VariantB 
The provider for "Polar Stereographic (Variant B)" projection (EPSG:9829).

Polyconic 
The provider for "American Polyconic" projection (EPSG:9818).

PositionVector7Param 
The provider for "Position Vector 7parameters transformation" (EPSG:9606).

PseudoMercator 
The provider for "Popular Visualisation Pseudo Mercator" projection (EPSG:1024).

RGF93 
The provider for "France geocentric interpolation" (ESPG:9655).

Stereographic 
The base provider for "Stereographic" projections.

TransverseMercator 
The provider for "Transverse Mercator" projection (EPSG:9807).

TransverseMercator.SouthOrientated 
The provider for Mercator Transverse (South Orientated) projection
(EPSG:9808).

UniversalParameters 
Collection of map projection parameters containing every names known
to Geotk.

WarpPolynomial 
The provider for
WarpTransform2D . 
MathTransformFactory
class.
ParameterDescriptorGroup
constant
named PARAMETERS
. Each group describes all the parameters expected by an operation method.
The set of parameters varies for each projection, but the following can be considered typical:
Each descriptor has many aliases, and those aliases may vary between different projections.
For example the false easting parameter is usually called "false_easting"
by OGC, while EPSG uses various names like "False easting" or "Easting at
false origin".
"earth_radius"
, which copy its value to the "semi_major"
and
"semi_minor"
parameter values."inverse_flattening"
, which compute the "semi_minor"
value from
the "semi_major"
parameter value."standard_parallel"
expecting an array of type double[]
, which copy
its elements to the "standard_parallel_1"
and "standard_parallel_2"
parameter scalar values.The main purpose of those dynamic parameters is to support some less commonly used conventions without duplicating the most commonly used conventions. The alternative ways are used in NetCDF files for example, which often use spherical models instead than ellipsoidal ones.
Optional parameters, on the other hand, are often nonstandard extensions. They will appear in WKT formatting only if the user defined explicitly a value which is different than the default value.
"roll_longitude"
boolean parameter.
If this parameter is set to TRUE
, then any longitude outside the
[180 … 180)° range (upper value is exclusive) will be forced to that range by the
addition or subtraction of some multiple of 360°. This applies to both the input of
projections and the output of inverse projections.
If this parameter is not provided, then the default behavior is to roll longitudes only if the central meridian is different than zero.
AXIS
elements.
But ESRI ignores AXIS
elements and uses instead some additional parameters:
"X_Scale"
, "Y_Scale"
and "XY_Plane_Rotation"
.
Those parameters are not OGC standards, but are nevertheless provided in Geotk for better
interoperability with ESRI definitions of coordinate reference systems.MathTransformProvider
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