stereographic.html
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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>Stereographic (Geotools 2.3.x 2.3.2 API)</TITLE><META NAME="keywords" CONTENT="org.geotools.referencing.operation.projection.Stereographic class"><META NAME="keywords" CONTENT="EPSG"><META NAME="keywords" CONTENT="USGS"><META NAME="keywords" CONTENT="POLAR_A"><META NAME="keywords" CONTENT="POLAR_B"><META NAME="keywords" CONTENT="POLAR_NORTH"><META NAME="keywords" CONTENT="POLAR_SOUTH"><META NAME="keywords" CONTENT="stereoType"><META NAME="keywords" CONTENT="getParameterDescriptors()"><LINK REL ="stylesheet" TYPE="text/css" HREF="../../../../../stylesheet.css" TITLE="Style"><SCRIPT type="text/javascript">function windowTitle(){ parent.document.title="Stereographic (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/Stereographic.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/projection/PlateCarree.Provider.html" title="class in org.geotools.referencing.operation.projection"><B>PREV CLASS</B></A> <A HREF="../../../../../org/geotools/referencing/operation/projection/Stereographic.Provider_North_Pole.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="Stereographic.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="#field_summary">FIELD</A> | CONSTR | <A HREF="#method_summary">METHOD</A></FONT></TD><TD VALIGN="top" CLASS="NavBarCell3"><FONT SIZE="-2">DETAIL: <A HREF="#field_detail">FIELD</A> | CONSTR | <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 Stereographic</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>Stereographic</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><DL><DT><B>Direct Known Subclasses:</B> <DD><A HREF="../../../../../org/geotools/referencing/operation/projection/StereographicOblique.html" title="class in org.geotools.referencing.operation.projection">StereographicOblique</A>, <A HREF="../../../../../org/geotools/referencing/operation/projection/StereographicPolar.html" title="class in org.geotools.referencing.operation.projection">StereographicPolar</A></DD></DL><HR><DL><DT>public abstract class <B>Stereographic</B><DT>extends <A HREF="../../../../../org/geotools/referencing/operation/projection/MapProjection.html" title="class in org.geotools.referencing.operation.projection">MapProjection</A></DL><P>Stereographic Projection. The directions starting from the central point are true, but the areas and the lengths become increasingly deformed as one moves away from the center. This projection is used to represent polar areas. It can be adapted for other areas having a circular form. <p> This implementation, and its subclasses, provides transforms for six cases of the stereographic projection: <ul> <li><code>"Oblique_Stereographic"</code> (EPSG code 9809), alias <code>"Double_Stereographic"</code> in ESRI software</li> <li><code>"Stereographic"</code> in ESRI software (<strong>NOT</strong> EPSG code 9809)</li> <li><code>"Polar_Stereographic"</code> (EPSG code 9810, uses a series calculation for the inverse)</li> <li><code>"Polar Stereographic (variant B)"</code> (EPSG code 9829, uses a series calculation for the inverse)</li> <li><code>"Stereographic_North_Pole"</code> in ESRI software (uses itteration for the inverse)</li> <li><code>"Stereographic_South_Pole"</code> in ESRI software (uses itteration for the inverse)</li> </ul> Both the <code>"Oblique_Stereographic"</code> and <code>"Stereographic"</code> projections are "double" projections involving two parts: 1) a conformal transformation of the geographic coordinates to a sphere and 2) a spherical Stereographic projection. The EPSG considers both methods to be valid, but considers them to be a different coordinate operation methods. <p> The <code>"Stereographic"</code> case uses the USGS equations of Snyder. This employs a simplified conversion to the conformal sphere that computes the conformal latitude of each point on the sphere. <p> The <code>"Oblique_Stereographic"</code> case uses equations from the EPSG. This uses a more generalized form of the conversion to the conformal sphere; using only a single conformal sphere at the origin point. Since this is a "double" projection, it is sometimes called the "Double Stereographic". The <code>"Oblique_Stereographic"</code> is used in New Brunswick (Canada) and the Netherlands. <p> The <code>"Stereographic"</code> and <code>"Double Stereographic"</code> names are used in ESRI's ArcGIS 8.x product. The <code>"Oblique_Stereographic"</code> name is the EPSG name for the later only. <p> <strong>WARNING:</strong> Tests points calculated with ArcGIS's "Double Stereographic" are not always equal to points calculated with the <code>"Oblique_Stereographic"</code>. However, where there are differences, two different implementations of these equations (EPSG guidence note 7 and libproj) calculate the same values as we do. Until these differences are resolved, please be careful when using this projection. <p> If a <code>"latitude_of_origin"</code> parameter is supplied and is not consistent with the projection classification (for example a latitude different from ±90⌨️ 快捷键说明
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