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GeoUtils
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SUMMARY: NESTED | <A HREF="#field_summary">FIELD</A> | <A HREF="#constructor_summary">CONSTR</A> | <A HREF="#method_summary">METHOD</A></FONT></TD>
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com.TwentyCodes.android.location</FONT>
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Class GeoUtils</H2>
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<PRE>
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<A HREF="file:/home/ricky/Apps/android-sdk-linux_86/docs/reference/java/lang/Object.html?is-external=true" title="class or interface in java.lang">java.lang.Object</A>
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<IMG SRC="../../../../resources/inherit.gif" ALT="extended by "><B>com.TwentyCodes.android.location.GeoUtils</B>
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</PRE>
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<DT><PRE>public class <B>GeoUtils</B><DT>extends <A HREF="file:/home/ricky/Apps/android-sdk-linux_86/docs/reference/java/lang/Object.html?is-external=true" title="class or interface in java.lang">Object</A></DL>
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</PRE>
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<P>
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This class contains common tools for computing common geological problems
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<P>
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<P>
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<DL>
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<DT><B>Author:</B></DT>
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<DD>ricky barrette, Google Inc.</DD>
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</DL>
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<!-- =========== FIELD SUMMARY =========== -->
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<TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1">
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<CODE>static int</CODE></FONT></TD>
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<TD><CODE><B><A HREF="../../../../com/TwentyCodes/android/location/GeoUtils.html#EARTH_RADIUS_KM">EARTH_RADIUS_KM</A></B></CODE>
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<BR>
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</TD>
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<TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1">
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<CODE>static double</CODE></FONT></TD>
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<TD><CODE><B><A HREF="../../../../com/TwentyCodes/android/location/GeoUtils.html#MILLION">MILLION</A></B></CODE>
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<BR>
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<!-- ======== CONSTRUCTOR SUMMARY ======== -->
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<B>Constructor Summary</B></FONT></TH>
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<TD><CODE><B><A HREF="../../../../com/TwentyCodes/android/location/GeoUtils.html#GeoUtils()">GeoUtils</A></B>()</CODE>
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<BR>
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<!-- ========== METHOD SUMMARY =========== -->
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<TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1">
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<CODE>static double</CODE></FONT></TD>
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<TD><CODE><B><A HREF="../../../../com/TwentyCodes/android/location/GeoUtils.html#bearing(double, double, double, double)">bearing</A></B>(double lat1,
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double lon1,
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double lat2,
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double lon2)</CODE>
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<BR>
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computes the bearing of lat2/lon2 in relationship from lat1/lon1 in degrees East</TD>
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</TR>
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<TR BGCOLOR="white" CLASS="TableRowColor">
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<TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1">
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<CODE>static double</CODE></FONT></TD>
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<TD><CODE><B><A HREF="../../../../com/TwentyCodes/android/location/GeoUtils.html#bearing(GeoPoint, GeoPoint)">bearing</A></B>(GeoPoint p1,
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GeoPoint p2)</CODE>
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<BR>
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computes the bearing of lat2/lon2 in relationship from lat1/lon1 in degrees East</TD>
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</TR>
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<TR BGCOLOR="white" CLASS="TableRowColor">
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<TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1">
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<CODE>static GeoPoint</CODE></FONT></TD>
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<TD><CODE><B><A HREF="../../../../com/TwentyCodes/android/location/GeoUtils.html#distanceFrom(GeoPoint, double)">distanceFrom</A></B>(GeoPoint point,
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double distance)</CODE>
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<BR>
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Calculates a geopoint x meters away of the geopoint supplied.</TD>
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</TR>
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<TR BGCOLOR="white" CLASS="TableRowColor">
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<TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1">
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<CODE>static double</CODE></FONT></TD>
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<TD><CODE><B><A HREF="../../../../com/TwentyCodes/android/location/GeoUtils.html#distanceKm(double, double, double, double)">distanceKm</A></B>(double lat1,
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double lon1,
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double lat2,
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double lon2)</CODE>
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<BR>
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computes the distance between to lat1/lon1 and lat2/lon2 based on the curve of the earth</TD>
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</TR>
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<TR BGCOLOR="white" CLASS="TableRowColor">
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<TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1">
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<CODE>static double</CODE></FONT></TD>
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<TD><CODE><B><A HREF="../../../../com/TwentyCodes/android/location/GeoUtils.html#distanceKm(GeoPoint, GeoPoint)">distanceKm</A></B>(GeoPoint p1,
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GeoPoint p2)</CODE>
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<BR>
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computes the distance between to p1 and p2 based on the curve of the earth</TD>
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</TR>
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<TR BGCOLOR="white" CLASS="TableRowColor">
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<TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1">
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<CODE>static boolean</CODE></FONT></TD>
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<TD><CODE><B><A HREF="../../../../com/TwentyCodes/android/location/GeoUtils.html#isIntersecting(GeoPoint, float, GeoPoint, float, float)">isIntersecting</A></B>(GeoPoint userPoint,
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float accuracyRadius,
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GeoPoint locationPoint,
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float locationRadius,
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float fudgeFactor)</CODE>
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<BR>
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a convince method for testing if 2 circles on the the surface of the earth intersect.</TD>
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</TR>
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<TR BGCOLOR="white" CLASS="TableRowColor">
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<TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1">
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<CODE>static <A HREF="../../../../com/TwentyCodes/android/location/MidPoint.html" title="class in com.TwentyCodes.android.location">MidPoint</A></CODE></FONT></TD>
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<TD><CODE><B><A HREF="../../../../com/TwentyCodes/android/location/GeoUtils.html#midPoint(GeoPoint, GeoPoint)">midPoint</A></B>(GeoPoint p1,
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GeoPoint p2)</CODE>
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<BR>
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computes a geopoint the is the central geopoint between p1 and p1</TD>
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</TR>
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<TR BGCOLOR="white" CLASS="TableRowColor">
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<TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1">
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<CODE>static double</CODE></FONT></TD>
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<TD><CODE><B><A HREF="../../../../com/TwentyCodes/android/location/GeoUtils.html#radToBearing(double)">radToBearing</A></B>(double rad)</CODE>
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<BR>
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converts radians to bearing</TD>
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</TR>
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</TABLE>
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<A NAME="methods_inherited_from_class_java.lang.Object"><!-- --></A>
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<TR BGCOLOR="#EEEEFF" CLASS="TableSubHeadingColor">
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<TH ALIGN="left"><B>Methods inherited from class java.lang.<A HREF="file:/home/ricky/Apps/android-sdk-linux_86/docs/reference/java/lang/Object.html?is-external=true" title="class or interface in java.lang">Object</A></B></TH>
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</TR>
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<TR BGCOLOR="white" CLASS="TableRowColor">
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<TD><CODE><A HREF="file:/home/ricky/Apps/android-sdk-linux_86/docs/reference/java/lang/Object.html?is-external=true#equals(java.lang.Object)" title="class or interface in java.lang">equals</A>, <A HREF="file:/home/ricky/Apps/android-sdk-linux_86/docs/reference/java/lang/Object.html?is-external=true#getClass()" title="class or interface in java.lang">getClass</A>, <A HREF="file:/home/ricky/Apps/android-sdk-linux_86/docs/reference/java/lang/Object.html?is-external=true#hashCode()" title="class or interface in java.lang">hashCode</A>, <A HREF="file:/home/ricky/Apps/android-sdk-linux_86/docs/reference/java/lang/Object.html?is-external=true#notify()" title="class or interface in java.lang">notify</A>, <A HREF="file:/home/ricky/Apps/android-sdk-linux_86/docs/reference/java/lang/Object.html?is-external=true#notifyAll()" title="class or interface in java.lang">notifyAll</A>, <A HREF="file:/home/ricky/Apps/android-sdk-linux_86/docs/reference/java/lang/Object.html?is-external=true#toString()" title="class or interface in java.lang">toString</A>, <A HREF="file:/home/ricky/Apps/android-sdk-linux_86/docs/reference/java/lang/Object.html?is-external=true#wait()" title="class or interface in java.lang">wait</A>, <A HREF="file:/home/ricky/Apps/android-sdk-linux_86/docs/reference/java/lang/Object.html?is-external=true#wait(long)" title="class or interface in java.lang">wait</A>, <A HREF="file:/home/ricky/Apps/android-sdk-linux_86/docs/reference/java/lang/Object.html?is-external=true#wait(long, int)" title="class or interface in java.lang">wait</A></CODE></TD>
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<!-- ============ FIELD DETAIL =========== -->
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<A NAME="EARTH_RADIUS_KM"><!-- --></A><H3>
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EARTH_RADIUS_KM</H3>
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<PRE>
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public static final int <B>EARTH_RADIUS_KM</B></PRE>
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<DL>
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<DL>
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<DT><B>See Also:</B><DD><A HREF="../../../../constant-values.html#com.TwentyCodes.android.location.GeoUtils.EARTH_RADIUS_KM">Constant Field Values</A></DL>
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</DL>
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<HR>
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<A NAME="MILLION"><!-- --></A><H3>
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MILLION</H3>
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<PRE>
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public static final double <B>MILLION</B></PRE>
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<DL>
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<DL>
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<DT><B>See Also:</B><DD><A HREF="../../../../constant-values.html#com.TwentyCodes.android.location.GeoUtils.MILLION">Constant Field Values</A></DL>
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</DL>
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<!-- ========= CONSTRUCTOR DETAIL ======== -->
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<A NAME="constructor_detail"><!-- --></A>
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<B>Constructor Detail</B></FONT></TH>
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</TR>
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<A NAME="GeoUtils()"><!-- --></A><H3>
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GeoUtils</H3>
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<PRE>
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public <B>GeoUtils</B>()</PRE>
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<DL>
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</DL>
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<!-- ============ METHOD DETAIL ========== -->
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<A NAME="method_detail"><!-- --></A>
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<B>Method Detail</B></FONT></TH>
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</TABLE>
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<A NAME="bearing(double, double, double, double)"><!-- --></A><H3>
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bearing</H3>
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<PRE>
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public static double <B>bearing</B>(double lat1,
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double lon1,
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double lat2,
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double lon2)</PRE>
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<DL>
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<DD>computes the bearing of lat2/lon2 in relationship from lat1/lon1 in degrees East
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<P>
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<DD><DL>
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<DT><B>Parameters:</B><DD><CODE>lat1</CODE> - source lat<DD><CODE>lon1</CODE> - source lon<DD><CODE>lat2</CODE> - destination lat<DD><CODE>lon2</CODE> - destination lon
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<DT><B>Returns:</B><DD>the bearing of lat2/lon2 in relationship from lat1/lon1 in degrees East</DL>
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</DD>
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</DL>
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<HR>
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<A NAME="bearing(GeoPoint, GeoPoint)"><!-- --></A><H3>
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bearing</H3>
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<PRE>
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public static double <B>bearing</B>(GeoPoint p1,
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GeoPoint p2)</PRE>
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<DL>
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<DD>computes the bearing of lat2/lon2 in relationship from lat1/lon1 in degrees East
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<P>
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<DD><DL>
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<DT><B>Parameters:</B><DD><CODE>p1</CODE> - source geopoint<DD><CODE>p2</CODE> - destination geopoint
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<DT><B>Returns:</B><DD>the bearing of p2 in relationship from p1 in degrees East</DL>
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</DD>
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</DL>
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<HR>
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<A NAME="distanceFrom(GeoPoint, double)"><!-- --></A><H3>
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distanceFrom</H3>
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<PRE>
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public static GeoPoint <B>distanceFrom</B>(GeoPoint point,
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double distance)</PRE>
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<DL>
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<DD>Calculates a geopoint x meters away of the geopoint supplied. The new geopoint
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shares the same latitude as geopoint point, this way they are on the same latitude arc.
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<P>
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<DD><DL>
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<DT><B>Parameters:</B><DD><CODE>point</CODE> - central geopoint<DD><CODE>distance</CODE> - in meters from the geopoint
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<DT><B>Returns:</B><DD>geopoint that is x meters away from the geopoint supplied</DL>
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</DD>
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</DL>
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<HR>
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<A NAME="distanceKm(double, double, double, double)"><!-- --></A><H3>
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distanceKm</H3>
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<PRE>
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public static double <B>distanceKm</B>(double lat1,
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double lon1,
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double lat2,
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double lon2)</PRE>
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<DL>
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<DD>computes the distance between to lat1/lon1 and lat2/lon2 based on the curve of the earth
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<P>
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<DD><DL>
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<DT><B>Parameters:</B><DD><CODE>lat1</CODE> - source lat<DD><CODE>lon1</CODE> - source lon<DD><CODE>lat2</CODE> - destination lat<DD><CODE>lon2</CODE> - destination lon
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<DT><B>Returns:</B><DD>the distance between to lat1/lon1 and lat2/lon2</DL>
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</DD>
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</DL>
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<HR>
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<A NAME="isIntersecting(GeoPoint, float, GeoPoint, float, float)"><!-- --></A><H3>
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isIntersecting</H3>
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<PRE>
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public static boolean <B>isIntersecting</B>(GeoPoint userPoint,
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float accuracyRadius,
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GeoPoint locationPoint,
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float locationRadius,
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float fudgeFactor)</PRE>
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<DL>
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<DD>a convince method for testing if 2 circles on the the surface of the earth intersect.
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we will use this method to test if the users accuracy circle intersects a marked locaton's radius
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if ( (accuracyCircleRadius + locationRadius) - fudgeFactor) > acos(sin(lat1Rad)sin(lat2Rad)+cos(lat1Rad)cos(lat2Rad)cos(lon2Rad-lon1Rad)6371
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<P>
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<DD><DL>
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<DT><B>Parameters:</B><DD><CODE>userPoint</CODE> - <DD><CODE>accuracyRadius</CODE> - in KM<DD><CODE>locationPoint</CODE> - <DD><CODE>locationRadius</CODE> - in KM<DD><CODE>fudgeFactor</CODE> - how many KM the circles have to intersect
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<DT><B>Returns:</B><DD>true if the circles intersect</DL>
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</DD>
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</DL>
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<HR>
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<A NAME="distanceKm(GeoPoint, GeoPoint)"><!-- --></A><H3>
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distanceKm</H3>
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<PRE>
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public static double <B>distanceKm</B>(GeoPoint p1,
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|
GeoPoint p2)</PRE>
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<DL>
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<DD>computes the distance between to p1 and p2 based on the curve of the earth
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<P>
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|
<DD><DL>
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<DT><B>Parameters:</B><DD><CODE>p1</CODE> - <DD><CODE>p2</CODE> -
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<DT><B>Returns:</B><DD>the distance between to p1 and p2</DL>
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</DD>
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</DL>
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<HR>
|
|
|
|
<A NAME="midPoint(GeoPoint, GeoPoint)"><!-- --></A><H3>
|
|
midPoint</H3>
|
|
<PRE>
|
|
public static <A HREF="../../../../com/TwentyCodes/android/location/MidPoint.html" title="class in com.TwentyCodes.android.location">MidPoint</A> <B>midPoint</B>(GeoPoint p1,
|
|
GeoPoint p2)</PRE>
|
|
<DL>
|
|
<DD>computes a geopoint the is the central geopoint between p1 and p1
|
|
<P>
|
|
<DD><DL>
|
|
<DT><B>Parameters:</B><DD><CODE>p1</CODE> - first geopoint<DD><CODE>p2</CODE> - second geopoint
|
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<DT><B>Returns:</B><DD>a MidPoint object</DL>
|
|
</DD>
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</DL>
|
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<HR>
|
|
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<A NAME="radToBearing(double)"><!-- --></A><H3>
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|
radToBearing</H3>
|
|
<PRE>
|
|
public static double <B>radToBearing</B>(double rad)</PRE>
|
|
<DL>
|
|
<DD>converts radians to bearing
|
|
<P>
|
|
<DD><DL>
|
|
<DT><B>Parameters:</B><DD><CODE>rad</CODE> -
|
|
<DT><B>Returns:</B><DD>bearing</DL>
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</DD>
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