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<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd"><!--NewPage--><HTML><HEAD><!-- Generated by javadoc (build 1.4.2_13) on Tue Jun 05 11:36:17 GMT-05:00 2007 --><META http-equiv="Content-Type" content="text/html; charset=ISO-8859-1"><TITLE>org.geotools.referencing.crs (Geotools 2.3.x 2.3.2 API)</TITLE><META NAME="keywords" CONTENT="org.geotools.referencing.crs package"><LINK REL ="stylesheet" TYPE="text/css" HREF="../../../../stylesheet.css" TITLE="Style"><SCRIPT type="text/javascript">function windowTitle(){ parent.document.title="org.geotools.referencing.crs (Geotools 2.3.x 2.3.2 API)";}</SCRIPT></HEAD><BODY BGCOLOR="white" onload="windowTitle();"><!-- ========= START OF TOP NAVBAR ======= --><A NAME="navbar_top"><!-- --></A><A HREF="#skip-navbar_top" title="Skip navigation links"></A><TABLE BORDER="0" WIDTH="100%" CELLPADDING="1" CELLSPACING="0" SUMMARY=""><TR><TD COLSPAN=3 BGCOLOR="#EEEEFF" CLASS="NavBarCell1"><A NAME="navbar_top_firstrow"><!-- --></A><TABLE BORDER="0" CELLPADDING="0" CELLSPACING="3" SUMMARY=""> <TR ALIGN="center" VALIGN="top"> <TD BGCOLOR="#EEEEFF" CLASS="NavBarCell1"> <A HREF="../../../../overview-summary.html"><FONT CLASS="NavBarFont1"><B>Overview</B></FONT></A> </TD> <TD BGCOLOR="#FFFFFF" CLASS="NavBarCell1Rev"> <FONT CLASS="NavBarFont1Rev"><B>Package</B></FONT> </TD> <TD BGCOLOR="#EEEEFF" CLASS="NavBarCell1"> <FONT CLASS="NavBarFont1">Class</FONT> </TD> <TD BGCOLOR="#EEEEFF" CLASS="NavBarCell1"> <A HREF="package-use.html"><FONT CLASS="NavBarFont1"><B>Use</B></FONT></A> </TD> <TD BGCOLOR="#EEEEFF" CLASS="NavBarCell1"> <A HREF="package-tree.html"><FONT CLASS="NavBarFont1"><B>Tree</B></FONT></A> </TD> <TD BGCOLOR="#EEEEFF" CLASS="NavBarCell1"> <A HREF="../../../../deprecated-list.html"><FONT CLASS="NavBarFont1"><B>Deprecated</B></FONT></A> </TD> <TD BGCOLOR="#EEEEFF" CLASS="NavBarCell1"> <A HREF="../../../../index-all.html"><FONT CLASS="NavBarFont1"><B>Index</B></FONT></A> </TD> <TD BGCOLOR="#EEEEFF" CLASS="NavBarCell1"> <A HREF="../../../../help-doc.html"><FONT CLASS="NavBarFont1"><B>Help</B></FONT></A> </TD> </TR></TABLE></TD><TD ALIGN="right" VALIGN="top" ROWSPAN=3><EM></EM></TD></TR><TR><TD BGCOLOR="white" CLASS="NavBarCell2"><FONT SIZE="-2"> <A HREF="../../../../org/geotools/referencing/package-summary.html"><B>PREV PACKAGE</B></A> <A HREF="../../../../org/geotools/referencing/cs/package-summary.html"><B>NEXT PACKAGE</B></A></FONT></TD><TD BGCOLOR="white" CLASS="NavBarCell2"><FONT SIZE="-2"> <A HREF="../../../../index.html" target="_top"><B>FRAMES</B></A> <A HREF="package-summary.html" target="_top"><B>NO FRAMES</B></A> <SCRIPT type="text/javascript"> <!-- if(window==top) { document.writeln('<A HREF="../../../../allclasses-noframe.html"><B>All Classes</B></A>'); } //--></SCRIPT><NOSCRIPT> <A HREF="../../../../allclasses-noframe.html"><B>All Classes</B></A></NOSCRIPT></FONT></TD></TR></TABLE><A NAME="skip-navbar_top"></A><!-- ========= END OF TOP NAVBAR ========= --><HR><H2>Package org.geotools.referencing.crs</H2><A HREF="../../../../org/geotools/referencing/crs/AbstractCRS.html" title="class in org.geotools.referencing.crs">Coordinate reference systems</A> implementation. <P><B>See:</B><BR> <A HREF="#package_description"><B>Description</B></A><P><TABLE BORDER="1" WIDTH="100%" CELLPADDING="3" CELLSPACING="0" SUMMARY=""><TR BGCOLOR="#CCCCFF" CLASS="TableHeadingColor"><TD COLSPAN=2><FONT SIZE="+2"><B>Class Summary</B></FONT></TD></TR><TR BGCOLOR="white" CLASS="TableRowColor"><TD WIDTH="15%"><B><A HREF="../../../../org/geotools/referencing/crs/AbstractCRS.html" title="class in org.geotools.referencing.crs">AbstractCRS</A></B></TD><TD>Abstract coordinate reference system, usually defined by a coordinate system and a datum.</TD></TR><TR BGCOLOR="white" CLASS="TableRowColor"><TD WIDTH="15%"><B><A HREF="../../../../org/geotools/referencing/crs/AbstractDerivedCRS.html" title="class in org.geotools.referencing.crs">AbstractDerivedCRS</A></B></TD><TD>A coordinate reference system that is defined by its coordinate conversion from another coordinate reference system (not by a datum). </TD></TR><TR BGCOLOR="white" CLASS="TableRowColor"><TD WIDTH="15%"><B><A HREF="../../../../org/geotools/referencing/crs/AbstractSingleCRS.html" title="class in org.geotools.referencing.crs">AbstractSingleCRS</A></B></TD><TD>Abstract coordinate reference system, consisting of a single coordinate system and a single datum (as opposed to <A HREF="../../../../org/geotools/referencing/crs/DefaultCompoundCRS.html" title="class in org.geotools.referencing.crs">compound CRS</A>). </TD></TR><TR BGCOLOR="white" CLASS="TableRowColor"><TD WIDTH="15%"><B><A HREF="../../../../org/geotools/referencing/crs/AUTOCRSAuthorityFactory.html" title="class in org.geotools.referencing.crs">AUTOCRSAuthorityFactory</A></B></TD><TD><B>Deprecated.</B> <I>Moved to <A HREF="../../../../org/geotools/referencing/factory/wms/AutoCRSFactory.html" title="class in org.geotools.referencing.factory.wms"><CODE>AutoCRSFactory</CODE></A>.</I></TD></TR><TR BGCOLOR="white" CLASS="TableRowColor"><TD WIDTH="15%"><B><A HREF="../../../../org/geotools/referencing/crs/DefaultCompoundCRS.html" title="class in org.geotools.referencing.crs">DefaultCompoundCRS</A></B></TD><TD>A coordinate reference system describing the position of points through two or more independent coordinate reference systems. </TD></TR><TR BGCOLOR="white" CLASS="TableRowColor"><TD WIDTH="15%"><B><A HREF="../../../../org/geotools/referencing/crs/DefaultDerivedCRS.html" title="class in org.geotools.referencing.crs">DefaultDerivedCRS</A></B></TD><TD>A coordinate reference system that is defined by its coordinate conversion from another coordinate reference system but is not a projected coordinate reference system. </TD></TR><TR BGCOLOR="white" CLASS="TableRowColor"><TD WIDTH="15%"><B><A HREF="../../../../org/geotools/referencing/crs/DefaultEngineeringCRS.html" title="class in org.geotools.referencing.crs">DefaultEngineeringCRS</A></B></TD><TD>A contextually local coordinate reference system. </TD></TR><TR BGCOLOR="white" CLASS="TableRowColor"><TD WIDTH="15%"><B><A HREF="../../../../org/geotools/referencing/crs/DefaultGeocentricCRS.html" title="class in org.geotools.referencing.crs">DefaultGeocentricCRS</A></B></TD><TD>A 3D coordinate reference system with the origin at the approximate centre of mass of the earth. </TD></TR><TR BGCOLOR="white" CLASS="TableRowColor"><TD WIDTH="15%"><B><A HREF="../../../../org/geotools/referencing/crs/DefaultGeographicCRS.html" title="class in org.geotools.referencing.crs">DefaultGeographicCRS</A></B></TD><TD>A 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. </TD></TR><TR BGCOLOR="white" CLASS="TableRowColor"><TD WIDTH="15%"><B><A HREF="../../../../org/geotools/referencing/crs/DefaultImageCRS.html" title="class in org.geotools.referencing.crs">DefaultImageCRS</A></B></TD><TD>An engineering coordinate reference system applied to locations in images. </TD></TR><TR BGCOLOR="white" CLASS="TableRowColor"><TD WIDTH="15%"><B><A HREF="../../../../org/geotools/referencing/crs/DefaultProjectedCRS.html" title="class in org.geotools.referencing.crs">DefaultProjectedCRS</A></B></TD><TD>A 2D coordinate reference system used to approximate the shape of the earth on a planar surface. </TD></TR><TR BGCOLOR="white" CLASS="TableRowColor"><TD WIDTH="15%"><B><A HREF="../../../../org/geotools/referencing/crs/DefaultTemporalCRS.html" title="class in org.geotools.referencing.crs">DefaultTemporalCRS</A></B></TD><TD>A 1D coordinate reference system used for the recording of time. </TD></TR><TR BGCOLOR="white" CLASS="TableRowColor"><TD WIDTH="15%"><B><A HREF="../../../../org/geotools/referencing/crs/DefaultVerticalCRS.html" title="class in org.geotools.referencing.crs">DefaultVerticalCRS</A></B></TD><TD>A 1D coordinate reference system used for recording heights or depths. </TD></TR><TR BGCOLOR="white" CLASS="TableRowColor"><TD WIDTH="15%"><B><A HREF="../../../../org/geotools/referencing/crs/EPSGCRSAuthorityFactory.html" title="class in org.geotools.referencing.crs">EPSGCRSAuthorityFactory</A></B></TD><TD>Default implementation for a coordinate reference system authority factory backed by the EPSG property file. </TD></TR></TABLE> <P><A NAME="package_description"><!-- --></A><H2>Package org.geotools.referencing.crs Description</H2><P><A HREF="../../../../org/geotools/referencing/crs/AbstractCRS.html" title="class in org.geotools.referencing.crs">Coordinate reference systems</A> implementation. An explanation for this package is provided in the OpenGIS® javadoc. The remaining discussion on this page is specific to the Geotools implementation. <P ALIGN="justify"><A HREF="../../../../org/geotools/referencing/crs/AbstractCRS.html" title="class in org.geotools.referencing.crs"><CODE>AbstractCRS</CODE></A> is the base class for all coordinate reference systems (CRS). CRS can have an arbitrary number of dimensions. Some are two-dimensional (e.g. <A HREF="../../../../org/geotools/referencing/crs/DefaultGeographicCRS.html" title="class in org.geotools.referencing.crs"><CODE>GeographicCRS</CODE></A> and <A HREF="../../../../org/geotools/referencing/crs/DefaultProjectedCRS.html" title="class in org.geotools.referencing.crs"><CODE>ProjectedCRS</CODE></A>), while some others are one-dimensional (e.g. <A HREF="../../../../org/geotools/referencing/crs/DefaultVerticalCRS.html" title="class in org.geotools.referencing.crs"><CODE>VerticalCRS</CODE></A> and <A HREF="../../../../org/geotools/referencing/crs/DefaultTemporalCRS.html" title="class in org.geotools.referencing.crs"><CODE>TemporalCRS</CODE></A>). 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 (<var>latitude</var>, <var>longitude</var>, <var>time</var>) with an aggregation of <A HREF="../../../../org/geotools/referencing/crs/DefaultGeographicCRS.html" title="class in org.geotools.referencing.crs"><CODE>GeographicCRS</CODE></A> and <A HREF="../../../../org/geotools/referencing/crs/DefaultTemporalCRS.html" title="class in org.geotools.referencing.crs"><CODE>TemporalCRS</CODE></A>. Such aggregations are built with <A HREF="../../../../org/geotools/referencing/crs/DefaultCompoundCRS.html" title="class in org.geotools.referencing.crs"><CODE>CompoundCRS</CODE></A>.</P><P><P><HR><!-- ======= START OF BOTTOM NAVBAR ====== --><A NAME="navbar_bottom"><!-- --></A><A HREF="#skip-navbar_bottom" title="Skip navigation links"></A><TABLE BORDER="0" WIDTH="100%" CELLPADDING="1" CELLSPACING="0" SUMMARY=""><TR><TD COLSPAN=3 BGCOLOR="#EEEEFF" CLASS="NavBarCell1"><A NAME="navbar_bottom_firstrow"><!-- --></A><TABLE BORDER="0" CELLPADDING="0" CELLSPACING="3" SUMMARY=""> <TR ALIGN="center" VALIGN="top"> <TD BGCOLOR="#EEEEFF" CLASS="NavBarCell1"> <A HREF="../../../../overview-summary.html"><FONT CLASS="NavBarFont1"><B>Overview</B></FONT></A> </TD> <TD BGCOLOR="#FFFFFF" CLASS="NavBarCell1Rev"> <FONT CLASS="NavBarFont1Rev"><B>Package</B></FONT> </TD> <TD BGCOLOR="#EEEEFF" CLASS="NavBarCell1"> <FONT CLASS="NavBarFont1">Class</FONT> </TD> <TD BGCOLOR="#EEEEFF" CLASS="NavBarCell1"> <A HREF="package-use.html"><FONT CLASS="NavBarFont1"><B>Use</B></FONT></A> </TD> <TD BGCOLOR="#EEEEFF" CLASS="NavBarCell1"> <A HREF="package-tree.html"><FONT CLASS="NavBarFont1"><B>Tree</B></FONT></A> </TD> <TD BGCOLOR="#EEEEFF" CLASS="NavBarCell1"> <A HREF="../../../../deprecated-list.html"><FONT CLASS="NavBarFont1"><B>Deprecated</B></FONT></A> </TD> <TD BGCOLOR="#EEEEFF" CLASS="NavBarCell1"> <A HREF="../../../../index-all.html"><FONT CLASS="NavBarFont1"><B>Index</B></FONT></A> </TD> <TD BGCOLOR="#EEEEFF" CLASS="NavBarCell1"> <A HREF="../../../../help-doc.html"><FONT CLASS="NavBarFont1"><B>Help</B></FONT></A> </TD> </TR></TABLE></TD><TD ALIGN="right" VALIGN="top" ROWSPAN=3><EM></EM></TD></TR><TR><TD BGCOLOR="white" CLASS="NavBarCell2"><FONT SIZE="-2"> <A HREF="../../../../org/geotools/referencing/package-summary.html"><B>PREV PACKAGE</B></A> <A HREF="../../../../org/geotools/referencing/cs/package-summary.html"><B>NEXT PACKAGE</B></A></FONT></TD><TD BGCOLOR="white" CLASS="NavBarCell2"><FONT SIZE="-2"> <A HREF="../../../../index.html" target="_top"><B>FRAMES</B></A> <A HREF="package-summary.html" target="_top"><B>NO FRAMES</B></A> <SCRIPT type="text/javascript"> <!-- if(window==top) { document.writeln('<A HREF="../../../../allclasses-noframe.html"><B>All Classes</B></A>'); } //--></SCRIPT><NOSCRIPT> <A HREF="../../../../allclasses-noframe.html"><B>All Classes</B></A></NOSCRIPT></FONT></TD></TR></TABLE><A NAME="skip-navbar_bottom"></A><!-- ======== END OF BOTTOM NAVBAR ======= --><HR>Copyright © 1996-2007 <a href="http://www.geotools.org">Geotools</a>. 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