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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 11:36:20 GMT-05:00 2007 --><META http-equiv="Content-Type" content="text/html; charset=ISO-8859-1"><TITLE>NADCONTransform (Geotools 2.3.x 2.3.2 API)</TITLE><META NAME="keywords" CONTENT="org.geotools.referencing.operation.transform.NADCONTransform class"><META NAME="keywords" CONTENT="getParameterDescriptors()"><META NAME="keywords" CONTENT="getParameterValues()"><META NAME="keywords" CONTENT="getSourceDimensions()"><META NAME="keywords" CONTENT="getTargetDimensions()"><META NAME="keywords" CONTENT="transform()"><META NAME="keywords" CONTENT="inverseTransform()"><META NAME="keywords" CONTENT="inverse()"><META NAME="keywords" CONTENT="hashCode()"><META NAME="keywords" CONTENT="equals()"><META NAME="keywords" CONTENT="main()"><LINK REL ="stylesheet" TYPE="text/css" HREF="../../../../../stylesheet.css" TITLE="Style"><SCRIPT type="text/javascript">function windowTitle(){ parent.document.title="NADCONTransform (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/NADCONTransform.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/operation/transform/MolodenskiTransform.ProviderAbridged.html" title="class in org.geotools.referencing.operation.transform"><B>PREV CLASS</B></A> <A HREF="../../../../../org/geotools/referencing/operation/transform/NADCONTransform.Provider.html" title="class in org.geotools.referencing.operation.transform"><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="NADCONTransform.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> | FIELD | <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.transform</FONT><BR>Class NADCONTransform</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"><B>NADCONTransform</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>NADCONTransform</B><DT>extends <A HREF="../../../../../org/geotools/referencing/operation/transform/AbstractMathTransform.html" title="class in org.geotools.referencing.operation.transform">AbstractMathTransform</A><DT>implements 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></DL><P>Transform backed by the North American Datum Conversion grid. The North American Datum Conversion (NADCON) Transform (EPSG code 9613) is a two dimentional datum shift method, created by the National Geodetic Survey (NGS), that uses interpolated values from two grid shift files. This method is used to transform NAD27 (EPSG code 4267) datum coordinates (and some others) to NAD83 (EPSG code 4267) within the United States. There are two set of grid shift files: NADCON and High Accuracy Reference Networks (HARN). NADCON shfts from NAD27 (and some others) to NAD83 while HARN shifts from the NADCON NAD83 to an improved NAD83. Both sets of grid shift files may be downloaded from <a href="http://www.ngs.noaa.gov/PC_PROD/NADCON/">www.ngs.noaa.gov/PC_PROD/NADCON/</a>. <p> Some of the NADCON grids, their areas of use, and source datums are shown in the following table. <p> <table> <tr><th>Shift File Name</td><th>Area</td><th>Source Datum</td><th>Accuracy at 67% confidence (m)</td></tr> <tr><td>CONUS</td><td>Conterminous U S (lower 48 states)</td><td>NAD27</td><td>0.15</td></tr> <tr><td>ALASKA</td><td>Alaska, incl. Aleutian Islands</td><td>NAD27</td><td>0.5</td></tr> <tr><td>HAWAII</td><td>Hawaiian Islands</td><td>Old Hawaiian (4135)</td><td>0.2</td></tr> <tr><td>STLRNC</td><td>St. Lawrence Is., AK</td><td>St. Lawrence Island (4136)</td><td>--</td></tr> <tr><td>STPAUL </td><td>St. Paul Is., AK</td><td>St. Paul Island (4137)</td><td>--</td></tr> <tr><td>STGEORGE</td><td>St. George Is., AK</td><td>St. George Island (4138)</td><td>--</td></tr> <tr><td>PRVI</td><td>Puerto Rico and the Virgin Islands</td><td>Puerto Rico (4139)</td><td>0.05</td></tr> </table> <p> Grid shift files come in two formats: binary and text. The files from the NGS are binary and have (latitude shift) and (longitude shift) extentions. Text grids may be created with the <cite>NGS nadgrd</cite> program and have (latitude shift) and (longitude shift) file extentions. Both types of files may be used here. <p> The grid names to use for transforming are parameters of this <CODE>MathTransform</CODE>. This parameter may be the full name and path to the grids or just the name of the grids if the default location of the grids was set as a preference. This preference may be set with the main method of this class. <p> Transformations here have been tested to be within 0.00001 seconds of values given by the <cite>NGS ndcon210</cite> program for NADCON grids. American Samoa and HARN shifts have not yet been tested. <strong>References:</strong> <ul> <li><a href="http://www.ngs.noaa.gov/PC_PROD/NADCON/Readme.htm">NADCONreadme</a></li> <li>American Samoa Grids for NADCON - Samoa_Readme.txt</li> <li><a href="http://www.ngs.noaa.gov/PUBS_LIB/NGS50.pdf">NADCON - The Application of Minimum-Curvature-Derived Surfaces in the Transformation of Positional Data From the North American Datum of 1927 to the North American Datum of 1983</a> - NOAA TM.</li> <li> - NGS fortran source code for NADCON conversions. See the following subroutines: TRANSF, TO83, FGRID, INTRP, COEFF and SURF</li> <li> - NGS fortran source code to export/import binary and text grid formats</li> <li>EPSG Geodesy Parameters database version 6.5</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://www.ngs.noaa.gov/TOOLS/Nadcon/Nadcon.html"> NADCON - North American Datum Conversion Utility</a>, <A HREF="../../../../../serialized-form.html#org.geotools.referencing.operation.transform.NADCONTransform">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/transform/NADCONTransform.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/transform/NADCONTransform.Provider.html" title="class in org.geotools.referencing.operation.transform">NADCONTransform.Provider</A></B></CODE><BR> The provider for <A HREF="../../../../../org/geotools/referencing/operation/transform/NADCONTransform.html" title="class in org.geotools.referencing.operation.transform"><CODE>NADCONTransform</CODE></A>. </TD></TR></TABLE> <!-- =========== FIELD SUMMARY =========== --><!-- ======== CONSTRUCTOR SUMMARY ======== --><A NAME="constructor_summary"><!-- --></A><TABLE BORDER="1" WIDTH="100%" CELLPADDING="3" CELLSPACING="0" SUMMARY=""><TR BGCOLOR="#CCCCFF" CLASS="TableHeadingColor"><TD COLSPAN=2><FONT SIZE="+2"><B>Constructor Summary</B></FONT></TD></TR><TR BGCOLOR="white" CLASS="TableRowColor"><TD><CODE><B><A HREF="../../../../../org/geotools/referencing/operation/transform/NADCONTransform.html#NADCONTransform(java.lang.String, java.lang.String)">NADCONTransform</A></B>(<A HREF="http://java.sun.com/j2se/1.4/docs/api/java/lang/String.html" title="class or interface in java.lang">String</A> latGridName, <A HREF="http://java.sun.com/j2se/1.4/docs/api/java/lang/String.html" title="class or interface in java.lang">String</A> longGridName)</CODE><BR> Constructs a from the specified grid shift files.</TD></TR></TABLE> <!-- ========== METHOD SUMMARY =========== --><A NAME="method_summary"><!-- --></A><TABLE BORDER="1" WIDTH="100%" CELLPADDING="3" CELLSPACING="0" SUMMARY=""><TR BGCOLOR="#CCCCFF" CLASS="TableHeadingColor">⌨️ 快捷键说明
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