/*
* GeoTools - The Open Source Java GIS Toolkit
* http://geotools.org
*
* (C) 2011, Open Source Geospatial Foundation (OSGeo)
* (C) 2003-2005, Open Geospatial Consortium Inc.
*
* All Rights Reserved. http://www.opengis.org/legal/
*/
package org.opengis.referencing.crs;
import org.opengis.referencing.cs.CartesianCS;
import org.opengis.referencing.datum.GeodeticDatum;
import org.opengis.referencing.operation.Projection;
import org.opengis.annotation.UML;
import static org.opengis.annotation.Obligation.*;
import static org.opengis.annotation.Specification.*;
/**
* A 2D coordinate reference system used to approximate the shape of the earth on a planar surface.
* It is done in such a way that the distortion that is inherent to the approximation is carefully
* controlled and known. Distortion correction is commonly applied to calculated bearings and
* distances to produce values that are a close match to actual field values.
*
* <TABLE CELLPADDING='6' BORDER='1'>
* <TR BGCOLOR="#EEEEFF"><TH NOWRAP>Used with CS type(s)</TH></TR>
* <TR><TD>
* {@link org.opengis.referencing.cs.CartesianCS Cartesian}
* </TD></TR></TABLE>
*
*
* @source $URL: http://svn.osgeo.org/geotools/trunk/modules/library/opengis/src/main/java/org/opengis/referencing/crs/ProjectedCRS.java $
* @version <A HREF="http://portal.opengeospatial.org/files/?artifact_id=6716">Abstract specification 2.0</A>
* @author Martin Desruisseaux (IRD)
* @since GeoAPI 1.0
*/
@UML(identifier="SC_ProjectedCRS", specification=ISO_19111)
public interface ProjectedCRS extends GeneralDerivedCRS {
/**
* Returns the base coordinate reference system, which must be geographic.
*/
GeographicCRS getBaseCRS();
/**
* Returns the map projection from the {@linkplain #getBaseCRS base CRS} to this CRS.
*/
Projection getConversionFromBase();
/**
* Returns the coordinate system, which must be cartesian.
*/
@UML(identifier="usesCS", obligation=MANDATORY, specification=ISO_19111)
CartesianCS getCoordinateSystem();
/**
* Returns the datum.
*/
GeodeticDatum getDatum();
}