defaultellipsoid.html

Geotools是一个开源的Java GIS工具包,可利用它来开发符合标准的地理信息系统。Geotools提供了OGC(Open Geospatial Consortium)规范的一个实现来作为他们的

<PRE>
protected <B>DefaultEllipsoid</B>(<A HREF="http://java.sun.com/j2se/1.4/docs/api/java/util/Map.html" title="class or interface in java.util">Map</A>&nbsp;properties,
                           double&nbsp;semiMajorAxis,
                           double&nbsp;semiMinorAxis,
                           double&nbsp;inverseFlattening,
                           boolean&nbsp;ivfDefinitive,
                           <A HREF="http://jsr-108.sourceforge.net/javadoc/javax/units/Unit.html" title="class or interface in javax.units">Unit</A>&nbsp;unit)</PRE>
<DL>
<DD>Constructs a new ellipsoid using the specified axis length. The properties map is
 given unchanged to the <A HREF="../../../../org/geotools/referencing/AbstractIdentifiedObject.html#AbstractIdentifiedObject(java.util.Map)">super-class constructor</A>.
<P>
<DT><B>Parameters:</B><DD><CODE>properties</CODE> - Set of properties. Should contains at least <code>"name"</code>.<DD><CODE>semiMajorAxis</CODE> - The equatorial radius.<DD><CODE>semiMinorAxis</CODE> - The polar radius.<DD><CODE>inverseFlattening</CODE> - The inverse of the flattening value.<DD><CODE>ivfDefinitive</CODE> -  if the inverse flattening is definitive.<DD><CODE>unit</CODE> - The units of the semi-major and semi-minor axis values.<DT><B>See Also:</B><DD><A HREF="../../../../org/geotools/referencing/datum/DefaultEllipsoid.html#createEllipsoid(java.lang.String, double, double, javax.units.Unit)"><CODE>createEllipsoid(java.lang.String, double, double, javax.units.Unit)</CODE></A>, 
<A HREF="../../../../org/geotools/referencing/datum/DefaultEllipsoid.html#createFlattenedSphere(java.lang.String, double, double, javax.units.Unit)"><CODE>createFlattenedSphere(java.lang.String, double, double, javax.units.Unit)</CODE></A></DL>

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<B>Method Detail</B></FONT></TD>
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<A NAME="createEllipsoid(java.lang.String, double, double, javax.units.Unit)"><!-- --></A><H3>
createEllipsoid</H3>
<PRE>
public static <A HREF="../../../../org/geotools/referencing/datum/DefaultEllipsoid.html" title="class in org.geotools.referencing.datum">DefaultEllipsoid</A> <B>createEllipsoid</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>&nbsp;name,
                                               double&nbsp;semiMajorAxis,
                                               double&nbsp;semiMinorAxis,
                                               <A HREF="http://jsr-108.sourceforge.net/javadoc/javax/units/Unit.html" title="class or interface in javax.units">Unit</A>&nbsp;unit)</PRE>
<DL>
<DD>Constructs a new ellipsoid using the specified axis length.
<P>
<DD><DL>
</DL>
</DD>
<DD><DL>
<DT><B>Parameters:</B><DD><CODE>name</CODE> - The ellipsoid name.<DD><CODE>semiMajorAxis</CODE> - The equatorial radius.<DD><CODE>semiMinorAxis</CODE> - The polar radius.<DD><CODE>unit</CODE> - The units of the semi-major and semi-minor axis values.</DL>
</DD>
</DL>
<HR>

<A NAME="createEllipsoid(java.util.Map, double, double, javax.units.Unit)"><!-- --></A><H3>
createEllipsoid</H3>
<PRE>
public static <A HREF="../../../../org/geotools/referencing/datum/DefaultEllipsoid.html" title="class in org.geotools.referencing.datum">DefaultEllipsoid</A> <B>createEllipsoid</B>(<A HREF="http://java.sun.com/j2se/1.4/docs/api/java/util/Map.html" title="class or interface in java.util">Map</A>&nbsp;properties,
                                               double&nbsp;semiMajorAxis,
                                               double&nbsp;semiMinorAxis,
                                               <A HREF="http://jsr-108.sourceforge.net/javadoc/javax/units/Unit.html" title="class or interface in javax.units">Unit</A>&nbsp;unit)</PRE>
<DL>
<DD>Constructs a new ellipsoid using the specified axis length. The properties map is
 given unchanged to the <A HREF="../../../../org/geotools/referencing/AbstractIdentifiedObject.html#AbstractIdentifiedObject(java.util.Map)">super-class constructor</A>.
<P>
<DD><DL>
</DL>
</DD>
<DD><DL>
<DT><B>Parameters:</B><DD><CODE>properties</CODE> - Set of properties. Should contains at least <code>"name"</code>.<DD><CODE>semiMajorAxis</CODE> - The equatorial radius.<DD><CODE>semiMinorAxis</CODE> - The polar radius.<DD><CODE>unit</CODE> - The units of the semi-major and semi-minor axis values.</DL>
</DD>
</DL>
<HR>

<A NAME="createFlattenedSphere(java.lang.String, double, double, javax.units.Unit)"><!-- --></A><H3>
createFlattenedSphere</H3>
<PRE>
public static <A HREF="../../../../org/geotools/referencing/datum/DefaultEllipsoid.html" title="class in org.geotools.referencing.datum">DefaultEllipsoid</A> <B>createFlattenedSphere</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>&nbsp;name,
                                                     double&nbsp;semiMajorAxis,
                                                     double&nbsp;inverseFlattening,
                                                     <A HREF="http://jsr-108.sourceforge.net/javadoc/javax/units/Unit.html" title="class or interface in javax.units">Unit</A>&nbsp;unit)</PRE>
<DL>
<DD>Constructs a new ellipsoid using the specified axis length and inverse flattening value.
<P>
<DD><DL>
</DL>
</DD>
<DD><DL>
<DT><B>Parameters:</B><DD><CODE>name</CODE> - The ellipsoid name.<DD><CODE>semiMajorAxis</CODE> - The equatorial radius.<DD><CODE>inverseFlattening</CODE> - The inverse flattening value.<DD><CODE>unit</CODE> - The units of the semi-major and semi-minor axis
                          values.</DL>
</DD>
</DL>
<HR>

<A NAME="createFlattenedSphere(java.util.Map, double, double, javax.units.Unit)"><!-- --></A><H3>
createFlattenedSphere</H3>
<PRE>
public static <A HREF="../../../../org/geotools/referencing/datum/DefaultEllipsoid.html" title="class in org.geotools.referencing.datum">DefaultEllipsoid</A> <B>createFlattenedSphere</B>(<A HREF="http://java.sun.com/j2se/1.4/docs/api/java/util/Map.html" title="class or interface in java.util">Map</A>&nbsp;properties,
                                                     double&nbsp;semiMajorAxis,
                                                     double&nbsp;inverseFlattening,
                                                     <A HREF="http://jsr-108.sourceforge.net/javadoc/javax/units/Unit.html" title="class or interface in javax.units">Unit</A>&nbsp;unit)</PRE>
<DL>
<DD>Constructs a new ellipsoid using the specified axis length and
 inverse flattening value. The properties map is given unchanged to the
 <A HREF="../../../../org/geotools/referencing/AbstractIdentifiedObject.html#AbstractIdentifiedObject(java.util.Map)">super-class constructor</A>.
<P>
<DD><DL>
</DL>
</DD>
<DD><DL>
<DT><B>Parameters:</B><DD><CODE>properties</CODE> - Set of properties. Should contains at least <code>"name"</code>.<DD><CODE>semiMajorAxis</CODE> - The equatorial radius.<DD><CODE>inverseFlattening</CODE> - The inverse flattening value.<DD><CODE>unit</CODE> - The units of the semi-major and semi-minor axis
                          values.</DL>
</DD>
</DL>
<HR>

<A NAME="wrap(org.opengis.referencing.datum.Ellipsoid)"><!-- --></A><H3>
wrap</H3>
<PRE>
public static <A HREF="../../../../org/geotools/referencing/datum/DefaultEllipsoid.html" title="class in org.geotools.referencing.datum">DefaultEllipsoid</A> <B>wrap</B>(Ellipsoid&nbsp;ellipsoid)</PRE>
<DL>
<DD>Wraps an arbitrary ellipsoid into a Geotools implementation. This method is usefull if
 <A HREF="../../../../org/geotools/referencing/datum/DefaultEllipsoid.html#orthodromicDistance(java.awt.geom.Point2D, java.awt.geom.Point2D)"><CODE>orthodromic distance computation</CODE></A> (for example) are desired.
 If the supplied ellipsoid is already an instance of  or is
 , then it is returned unchanged.
<P>
<DD><DL>
</DL>
</DD>
<DD><DL>
</DL>
</DD>
</DL>
<HR>

<A NAME="getAxisUnit()"><!-- --></A><H3>
getAxisUnit</H3>
<PRE>
public <A HREF="http://jsr-108.sourceforge.net/javadoc/javax/units/Unit.html" title="class or interface in javax.units">Unit</A> <B>getAxisUnit</B>()</PRE>
<DL>
<DD>Returns the linear unit of the <A HREF="../../../../org/geotools/referencing/datum/DefaultEllipsoid.html#getSemiMajorAxis()">semi-major</A>
 and <A HREF="../../../../org/geotools/referencing/datum/DefaultEllipsoid.html#getSemiMinorAxis()">semi-minor</A> axis values.
<P>
<DD><DL>
<DT><B>Specified by:</B><DD><CODE>getAxisUnit</CODE> in interface <CODE>Ellipsoid</CODE></DL>
</DD>
<DD><DL>

<DT><B>Returns:</B><DD>The axis linear unit.</DL>
</DD>
</DL>
<HR>

<A NAME="getSemiMajorAxis()"><!-- --></A><H3>
getSemiMajorAxis</H3>
<PRE>
public double <B>getSemiMajorAxis</B>()</PRE>
<DL>
<DD>Length of the semi-major axis of the ellipsoid. This is the
 equatorial radius in <A HREF="../../../../org/geotools/referencing/datum/DefaultEllipsoid.html#getAxisUnit()">axis linear unit</A>.
<P>
<DD><DL>
<DT><B>Specified by:</B><DD><CODE>getSemiMajorAxis</CODE> in interface <CODE>Ellipsoid</CODE></DL>
</DD>
<DD><DL>

<DT><B>Returns:</B><DD>Length of semi-major axis.</DL>
</DD>
</DL>
<HR>

<A NAME="getSemiMinorAxis()"><!-- --></A><H3>
getSemiMinorAxis</H3>
<PRE>
public double <B>getSemiMinorAxis</B>()</PRE>
<DL>
<DD>Length of the semi-minor axis of the ellipsoid. This is the
 polar radius in <A HREF="../../../../org/geotools/referencing/datum/DefaultEllipsoid.html#getAxisUnit()">axis linear unit</A>.
<P>
<DD><DL>
<DT><B>Specified by:</B><DD><CODE>getSemiMinorAxis</CODE> in interface <CODE>Ellipsoid</CODE></DL>
</DD>
<DD><DL>

<DT><B>Returns:</B><DD>Length of semi-minor axis.</DL>
</DD>
</DL>
<HR>

<A NAME="getEccentricity()"><!-- --></A><H3>
getEccentricity</H3>
<PRE>
public double <B>getEccentricity</B>()</PRE>
<DL>
<DD>The ratio of the distance between the center and a focus of the ellipse
 to the length of its semimajor axis. The eccentricity can alternately be
 computed from the equation: <code>e=sqrt(2f-f