Coordinate reference systems implementation. An explanation for this package is provided in the OpenGIS® javadoc. The remaining discussion on this page is specific to the Geotools implementation.
AbstractCRS is the base class for all
coordinate reference systems (CRS). CRS can have an arbitrary number of dimensions. Some are two-dimensional
ProjectedCRS), while some others are one-dimensional
TemporalCRS). Those simple coordinate systems can be
used as building blocks for more complex coordinate reference systems. For example, it is possible to construct
a three-dimensional CRS with (latitude, longitude, time) with an aggregation
TemporalCRS. Such aggregations
are built with
Class Summary Class Description AbstractCRSAbstract coordinate reference system, usually defined by a coordinate system and a datum. AbstractDerivedCRSA coordinate reference system that is defined by its coordinate conversion from another coordinate reference system (not by a datum). AbstractSingleCRSAbstract coordinate reference system, consisting of a single coordinate system and a single datum (as opposed to compound CRS). DefaultCompoundCRSA coordinate reference system describing the position of points through two or more independent coordinate reference systems. DefaultDerivedCRSA coordinate reference system that is defined by its coordinate conversion from another coordinate reference system but is not a projected coordinate reference system. DefaultEngineeringCRSA contextually local coordinate reference system. DefaultGeocentricCRSA 3D coordinate reference system with the origin at the approximate centre of mass of the earth. DefaultGeographicCRSA coordinate reference system based on an ellipsoidal approximation of the geoid; this provides an accurate representation of the geometry of geographic features for a large portion of the earth's surface. DefaultImageCRSAn engineering coordinate reference system applied to locations in images. DefaultProjectedCRSA 2D coordinate reference system used to approximate the shape of the earth on a planar surface. DefaultTemporalCRSA 1D coordinate reference system used for the recording of time. DefaultVerticalCRSA 1D coordinate reference system used for recording heights or depths.