org.opengis.referencing.operation

Interface Projection

All Superinterfaces:

Conversion, CoordinateOperation, IdentifiedObject, Operation, SingleOperation

All Known Subinterfaces:

ConicProjection, CylindricalProjection, PlanarProjection

All Known Implementing Classes:

DefaultConicProjection, DefaultCylindricalProjection, DefaultPlanarProjection, DefaultProjection

@Extension
public interface Projection
extends Conversion

A conversion transforming (longitude,latitude) coordinates to cartesian coordinates (x,y). Although some map projections can be represented as a geometric process, in general a map projection is a set of formulae that converts geodetic latitude and longitude to plane (map) coordinates. Height plays no role in this process, which is entirely two-dimensional. The same map projection can be applied to many geographic CRSs, resulting in many projected CRSs each of which is related to the same geodetic datum as the geographic CRS on which it was based.

An unofficial list of projections and their parameters can be found there. Most projections expect the following parameters: "semi_major" (mandatory), "semi_minor" (mandatory), "central_meridian" (default to 0), "latitude_of_origin" (default to 0), "scale_factor" (default to 1), "false_easting" (default to 0) and "false_northing" (default to 0).

Since:

GeoAPI 1.0

Author:

Martin Desruisseaux (IRD)

See Also:

ProjectedCRS, Map projections on MathWorld

Field Summary

Fields inherited from interface CoordinateOperation

COORDINATE_OPERATION_ACCURACY_KEY, DOMAIN_OF_VALIDITY_KEY, OPERATION_VERSION_KEY, SCOPE_KEY

Fields inherited from interface IdentifiedObject

ALIAS_KEY, IDENTIFIERS_KEY, NAME_KEY, REMARKS_KEY

Method Summary

Methods inherited from interface Conversion

getOperationVersion, getSourceCRS, getTargetCRS

Methods inherited from interface Operation

getMethod, getParameterValues

Methods inherited from interface CoordinateOperation

getCoordinateOperationAccuracy, getDomainOfValidity, getMathTransform, getScope

Methods inherited from interface IdentifiedObject

getAlias, getIdentifiers, getName, getRemarks, toWKT