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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 11:36:21 GMT-05:00 2007 --><META http-equiv="Content-Type" content="text/html; charset=ISO-8859-1"><TITLE>AlbersEqualArea (Geotools 2.3.x 2.3.2 API)</TITLE><META NAME="keywords" CONTENT="org.geotools.referencing.operation.projection.AlbersEqualArea class"><META NAME="keywords" CONTENT="getParameterDescriptors()"><META NAME="keywords" CONTENT="getParameterValues()"><META NAME="keywords" CONTENT="transformNormalized()"><META NAME="keywords" CONTENT="inverseTransformNormalized()"><META NAME="keywords" CONTENT="hashCode()"><META NAME="keywords" CONTENT="equals()"><LINK REL ="stylesheet" TYPE="text/css" HREF="../../../../../stylesheet.css" TITLE="Style"><SCRIPT type="text/javascript">function windowTitle(){ parent.document.title="AlbersEqualArea (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="#EEEEFF" CLASS="NavBarCell1"> <A HREF="package-summary.html"><FONT CLASS="NavBarFont1"><B>Package</B></FONT></A> </TD> <TD BGCOLOR="#FFFFFF" CLASS="NavBarCell1Rev"> <FONT CLASS="NavBarFont1Rev"><B>Class</B></FONT> </TD> <TD BGCOLOR="#EEEEFF" CLASS="NavBarCell1"> <A HREF="class-use/AlbersEqualArea.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"> PREV CLASS <A HREF="../../../../../org/geotools/referencing/operation/projection/AlbersEqualArea.Provider.html" title="class in org.geotools.referencing.operation.projection"><B>NEXT CLASS</B></A></FONT></TD><TD BGCOLOR="white" CLASS="NavBarCell2"><FONT SIZE="-2"> <A HREF="../../../../../index.html" target="_top"><B>FRAMES</B></A> <A HREF="AlbersEqualArea.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><TR><TD VALIGN="top" CLASS="NavBarCell3"><FONT SIZE="-2"> SUMMARY: <A HREF="#nested_class_summary">NESTED</A> | <A HREF="#fields_inherited_from_class_MapProjection">FIELD</A> | <A HREF="#constructor_summary">CONSTR</A> | <A HREF="#method_summary">METHOD</A></FONT></TD><TD VALIGN="top" CLASS="NavBarCell3"><FONT SIZE="-2">DETAIL: FIELD | <A HREF="#constructor_detail">CONSTR</A> | <A HREF="#method_detail">METHOD</A></FONT></TD></TR></TABLE><A NAME="skip-navbar_top"></A><!-- ========= END OF TOP NAVBAR ========= --><HR><!-- ======== START OF CLASS DATA ======== --><H2><FONT SIZE="-1">org.geotools.referencing.operation.projection</FONT><BR>Class AlbersEqualArea</H2><PRE><A HREF="http://java.sun.com/j2se/1.4/docs/api/java/lang/Object.html" title="class or interface in java.lang">Object</A> <IMG SRC="../../../../../resources/inherit.gif" ALT="extended by"><A HREF="../../../../../org/geotools/referencing/wkt/Formattable.html" title="class in org.geotools.referencing.wkt">Formattable</A> <IMG SRC="../../../../../resources/inherit.gif" ALT="extended by"><A HREF="../../../../../org/geotools/referencing/operation/transform/AbstractMathTransform.html" title="class in org.geotools.referencing.operation.transform">AbstractMathTransform</A> <IMG SRC="../../../../../resources/inherit.gif" ALT="extended by"><A HREF="../../../../../org/geotools/referencing/operation/projection/MapProjection.html" title="class in org.geotools.referencing.operation.projection">MapProjection</A> <IMG SRC="../../../../../resources/inherit.gif" ALT="extended by"><B>AlbersEqualArea</B></PRE><DL><DT><B>All Implemented Interfaces:</B> <DD>MathTransform, MathTransform2D, <A HREF="http://java.sun.com/j2se/1.4/docs/api/java/io/Serializable.html" title="class or interface in java.io">Serializable</A></DD></DL><HR><DL><DT>public class <B>AlbersEqualArea</B><DT>extends <A HREF="../../../../../org/geotools/referencing/operation/projection/MapProjection.html" title="class in org.geotools.referencing.operation.projection">MapProjection</A></DL><P>Albers Equal Area Projection (EPSG code 9822). This is a conic projection with parallels being unequally spaced arcs of concentric circles, more closely spaced at north and south edges of the map. Merideans are equally spaced radii of the same circles and intersect parallels at right angles. As the name implies, this projection minimizes distortion in areas. <p> The "standard_parallel_2" parameter is optional and will be given the same value as "standard_parallel_1" if not set (creating a 1 standard parallel projection). <p> NOTE: formulae used below are from a port, to java, of the 'proj4' package of the USGS survey. USGS work is acknowledged here. <p> <strong>References:</strong><ul> <li> Proj-4.4.7 available at <A HREF="http://www.remotesensing.org/proj">www.remotesensing.org/proj</A><br> Relevent files are: PJ_aea.c, pj_fwd.c and pj_inv.c </li> <li> John P. Snyder (Map Projections - A Working Manual, U.S. Geological Survey Professional Paper 1395, 1987)</li> <li> "Coordinate Conversions and Transformations including Formulas", EPSG Guidence Note Number 7, Version 19.</li> </ul><P><P><DL><DT><B>Since:</B></DT> <DD>2.1</DD><DT><B>Author:</B></DT> <DD>Rueben Schulz</DD><DT><B>See Also:</B><DD><A HREF="http://mathworld.wolfram.com/AlbersEqual-AreaConicProjection.html/">Albers Equal-Area Conic Projection on MathWorld</A>, <A HREF="http://www.remotesensing.org/geotiff/proj_list/albers_equal_area_conic.html"> "Albers_Conic_Equal_Area" on www.remotesensing.org</A>, <A HREF="http://srmwww.gov.bc.ca/gis/bceprojection.html">British Columbia Albers Standard Projection</A>, <A HREF="../../../../../serialized-form.html#org.geotools.referencing.operation.projection.AlbersEqualArea">Serialized Form</A><DT><B>Module:</B></DT><DD><CODE><B>module/referencing</B></CODE> (<A HREF="http://maven.geotools.fr/repository/org/geotools/gt2-referencing/"><CODE>gt2-referencing.jar</CODE></A>) (<A HREF="http://maven.geotools.fr/reports/referencing/index.html">Maven report</A>) (<A HREF="http://svn.geotools.org/geotools/tags/2.3.2/module/referencing/src/org/geotools/referencing/operation/projection/AlbersEqualArea.java">SVN head</A>)</DD></DL><HR><P><!-- ======== NESTED CLASS SUMMARY ======== --><A NAME="nested_class_summary"><!-- --></A><TABLE BORDER="1" WIDTH="100%" CELLPADDING="3" CELLSPACING="0" SUMMARY=""><TR BGCOLOR="#CCCCFF" CLASS="TableHeadingColor"><TD COLSPAN=2><FONT SIZE="+2"><B>Nested Class Summary</B></FONT></TD></TR><TR BGCOLOR="white" CLASS="TableRowColor"><TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1"><CODE>static class</CODE></FONT></TD><TD><CODE><B><A HREF="../../../../../org/geotools/referencing/operation/projection/AlbersEqualArea.Provider.html" title="class in org.geotools.referencing.operation.projection">AlbersEqualArea.Provider</A></B></CODE><BR> The <A HREF="../../../../../org/geotools/referencing/operation/MathTransformProvider.html" title="class in org.geotools.referencing.operation"><CODE>MathTransformProvider</CODE></A> for an <A HREF="../../../../../org/geotools/referencing/operation/projection/AlbersEqualArea.html" title="class in org.geotools.referencing.operation.projection">Albers Equal Area</A> projection.</TD></TR></TABLE> <A NAME="nested_classes_inherited_from_class_org.geotools.referencing.operation.projection.MapProjection"><!-- --></A><TABLE BORDER="1" WIDTH="100%" CELLPADDING="3" CELLSPACING="0" SUMMARY=""><TR BGCOLOR="#EEEEFF" CLASS="TableSubHeadingColor"><TD><B>Nested classes inherited from class <A HREF="../../../../../org/geotools/referencing/operation/projection/MapProjection.html" title="class in org.geotools.referencing.operation.projection">MapProjection</A></B></TD></TR><TR BGCOLOR="white" CLASS="TableRowColor"><TD><CODE><A HREF="../../../../../org/geotools/referencing/operation/projection/MapProjection.AbstractProvider.html" title="class in org.geotools.referencing.operation.projection">MapProjection.AbstractProvider</A></CODE></TD></TR></TABLE> <!-- =========== FIELD SUMMARY =========== --><A NAME="field_summary"><!-- --></A><TABLE BORDER="1" WIDTH="100%" CELLPADDING="3" CELLSPACING="0" SUMMARY=""><TR BGCOLOR="#CCCCFF" CLASS="TableHeadingColor"><TD COLSPAN=2><FONT SIZE="+2">⌨️ 快捷键说明
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