Package org.geotools.referencing.factory.epsg

Authority factories for the EPSG database.

EPSG codes are numerical identifiers. For example "4326" is the EPSG identifier for the "WGS 84" geographic CRS. However, the default implementation accepts names as well as numeric identifiers. For example "NTF (Paris) / France I" and "27581" both fetchs the same object. Note that names may be ambiguous since the same name may be used for more than one object. This is the case of "WGS 84" for example. If such an ambiguity is found, an exception will be thrown.

An EPSG authority factory is created using the following code:

org.opengis.referencing.crs.CRSAuthorityFactory factory = ReferencingFactoryFinder.getCRSAuthorityFactory("EPSG", null);

This package provides the general framework for accessing an EPSG database, but the actual connection to a database requires the existence of an EPSG plugin in the classpath. Otherwise, a org.geotools.factory.FactoryNotFoundException will be thrown. Available plugins are:

Required software	Data source	Plugin / JAR file	Additional notes
MS-Access ODBC driver	org.geotools.referencing.factory.epsg.FactoryOnAccess	epsg-access	See installation instructions
HSQL embedded database	org.geotools.referencing.factory.epsg.FactoryOnHSQL	epsg-hsql	Note for module mainteners
PostgreSQL database	org.geotools.referencing.factory.epsg.FactoryOnPostgreSQL	epsg-postgresql	Note for module mainteners

Class Summary

Class	Description
AbstractEpsgFactory	A coordinate reference system factory backed by the EPSG database tables.
AccessDialectEpsgFactory	This factory uses the MS-Access dialect of SQL.
AnsiDialectEpsgFactory	An EPSG factory for the database generated by SQL scripts rather than the MS-Access one.
AuthorityCodes	A set of EPSG authority codes.
CartesianAuthorityFactory	A factory providing a EPSG code for a cartesian engineering systems
CoordinateOperationFactoryUsingWKT	Authority factory that holds user-defined Coordinate Operations.
DirectEpsgFactory	A coordinate reference system factory backed by the EPSG database tables.
FactoryUsingAnsiSQL	An EPSG factory for the database generated by SQL scripts rather than the MS-Access one.
FactoryUsingSQL	Please use AccessDialectEpsgFactory.
FactoryUsingWKT	Authority factory for Coordinate Reference Systems beyong the one defined in the EPSG database.
LongitudeFirstEpsgDecorator	An EPSG authority factory using (longitude, latitude) axis order.
LongitudeFirstFactory	An EPSG authority factory using (longitude, latitude) axis order.
ThreadedEpsgFactory	Base class for EPSG factories to be registered in ReferencingFactoryFinder.