operations.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

invert</H3>
<PRE>
public Coverage <B>invert</B>(Coverage&nbsp;source)
                                     throws <A HREF="../../../../org/geotools/coverage/processing/CoverageProcessingException.html" title="class in org.geotools.coverage.processing">CoverageProcessingException</A></PRE>
<DL>
<DD>Inverts the sample values of a coverage.
<P>
<DD><DL>
<DT><B>Parameters:</B><DD><CODE>source</CODE> - The source coverage.
<DT><B>Throws:</B>
<DD><CODE><A HREF="../../../../org/geotools/coverage/processing/CoverageProcessingException.html" title="class in org.geotools.coverage.processing">CoverageProcessingException</A></CODE> - if the operation can't be applied.<DT><B>See Also:</B><DD><A HREF="../../../../org/geotools/coverage/processing/operation/Invert.html" title="class in org.geotools.coverage.processing.operation"><CODE>Invert</CODE></A></DL>
</DD>
</DL>
<HR>

<A NAME="absolute(org.opengis.coverage.Coverage)"><!-- --></A><H3>
absolute</H3>
<PRE>
public Coverage <B>absolute</B>(Coverage&nbsp;source)
                                       throws <A HREF="../../../../org/geotools/coverage/processing/CoverageProcessingException.html" title="class in org.geotools.coverage.processing">CoverageProcessingException</A></PRE>
<DL>
<DD>Computes the mathematical absolute value of each sample value.
<P>
<DD><DL>
<DT><B>Parameters:</B><DD><CODE>source</CODE> - The source coverage.
<DT><B>Throws:</B>
<DD><CODE><A HREF="../../../../org/geotools/coverage/processing/CoverageProcessingException.html" title="class in org.geotools.coverage.processing">CoverageProcessingException</A></CODE> - if the operation can't be applied.<DT><B>See Also:</B><DD><A HREF="../../../../org/geotools/coverage/processing/operation/Absolute.html" title="class in org.geotools.coverage.processing.operation"><CODE>Absolute</CODE></A></DL>
</DD>
</DL>
<HR>

<A NAME="log(org.opengis.coverage.Coverage)"><!-- --></A><H3>
log</H3>
<PRE>
public Coverage <B>log</B>(Coverage&nbsp;source)
                                  throws <A HREF="../../../../org/geotools/coverage/processing/CoverageProcessingException.html" title="class in org.geotools.coverage.processing">CoverageProcessingException</A></PRE>
<DL>
<DD>Takes the natural logarithm of the sample values of a coverage.
<P>
<DD><DL>
<DT><B>Parameters:</B><DD><CODE>source</CODE> - The source coverage.
<DT><B>Throws:</B>
<DD><CODE><A HREF="../../../../org/geotools/coverage/processing/CoverageProcessingException.html" title="class in org.geotools.coverage.processing">CoverageProcessingException</A></CODE> - if the operation can't be applied.<DT><B>See Also:</B><DD><A HREF="../../../../org/geotools/coverage/processing/operation/Log.html" title="class in org.geotools.coverage.processing.operation"><CODE>Log</CODE></A></DL>
</DD>
</DL>
<HR>

<A NAME="exp(org.opengis.coverage.Coverage)"><!-- --></A><H3>
exp</H3>
<PRE>
public Coverage <B>exp</B>(Coverage&nbsp;source)
                                  throws <A HREF="../../../../org/geotools/coverage/processing/CoverageProcessingException.html" title="class in org.geotools.coverage.processing">CoverageProcessingException</A></PRE>
<DL>
<DD>Takes the exponential of the sample values of a coverage.
<P>
<DD><DL>
<DT><B>Parameters:</B><DD><CODE>source</CODE> - The source coverage.
<DT><B>Throws:</B>
<DD><CODE><A HREF="../../../../org/geotools/coverage/processing/CoverageProcessingException.html" title="class in org.geotools.coverage.processing">CoverageProcessingException</A></CODE> - if the operation can't be applied.<DT><B>See Also:</B><DD><A HREF="../../../../org/geotools/coverage/processing/operation/Exp.html" title="class in org.geotools.coverage.processing.operation"><CODE>Exp</CODE></A></DL>
</DD>
</DL>
<HR>

<A NAME="nodataFilter(org.opengis.coverage.grid.GridCoverage)"><!-- --></A><H3>
nodataFilter</H3>
<PRE>
public GridCoverage <B>nodataFilter</B>(GridCoverage&nbsp;source)
                                                    throws <A HREF="../../../../org/geotools/coverage/processing/CoverageProcessingException.html" title="class in org.geotools.coverage.processing">CoverageProcessingException</A></PRE>
<DL>
<DD>Replaces <A HREF="http://java.sun.com/j2se/1.4/docs/api/java/lang/Float.html#NaN" title="class or interface in java.lang"><CODE>NaN</CODE></A> values by the weighted average of neighbors values.
 This method uses the default padding and validity threshold.
<P>
<DD><DL>
<DT><B>Parameters:</B><DD><CODE>source</CODE> - The source coverage.
<DT><B>Throws:</B>
<DD><CODE><A HREF="../../../../org/geotools/coverage/processing/CoverageProcessingException.html" title="class in org.geotools.coverage.processing">CoverageProcessingException</A></CODE> - if the operation can't be applied.<DT><B>See Also:</B><DD><A HREF="../../../../org/geotools/coverage/processing/operation/NodataFilter.html" title="class in org.geotools.coverage.processing.operation"><CODE>NodataFilter</CODE></A></DL>
</DD>
</DL>
<HR>

<A NAME="nodataFilter(org.opengis.coverage.grid.GridCoverage, int, int)"><!-- --></A><H3>
nodataFilter</H3>
<PRE>
public GridCoverage <B>nodataFilter</B>(GridCoverage&nbsp;source,
                                 int&nbsp;padding,
                                 int&nbsp;validityThreshold)
                                                    throws <A HREF="../../../../org/geotools/coverage/processing/CoverageProcessingException.html" title="class in org.geotools.coverage.processing">CoverageProcessingException</A></PRE>
<DL>
<DD>Replaces <A HREF="http://java.sun.com/j2se/1.4/docs/api/java/lang/Float.html#NaN" title="class or interface in java.lang"><CODE>NaN</CODE></A> values by the weighted average of neighbors values.
<P>
<DD><DL>
<DT><B>Parameters:</B><DD><CODE>source</CODE> - The source coverage.<DD><CODE>padding</CODE> - The number of pixels above, below, to the left and to the right of central
         pixel to use for computing the average. The default value is 1.<DD><CODE>validityThreshold</CODE> - The minimal number of valid values required for computing the
        average. The  value will be replaced by the average only if the number
        of valid value is greater than or equals to this threshold. The default value is 4.
<DT><B>Throws:</B>
<DD><CODE><A HREF="../../../../org/geotools/coverage/processing/CoverageProcessingException.html" title="class in org.geotools.coverage.processing">CoverageProcessingException</A></CODE> - if the operation can't be applied.<DT><B>See Also:</B><DD><A HREF="../../../../org/geotools/coverage/processing/operation/NodataFilter.html" title="class in org.geotools.coverage.processing.operation"><CODE>NodataFilter</CODE></A></DL>
</DD>
</DL>
<HR>

<A NAME="interpolate(org.opengis.coverage.grid.GridCoverage, java.lang.String)"><!-- --></A><H3>
interpolate</H3>
<PRE>
public GridCoverage <B>interpolate</B>(GridCoverage&nbsp;source,
                                <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;type)
                                                   throws <A HREF="../../../../org/geotools/coverage/processing/CoverageProcessingException.html" title="class in org.geotools.coverage.processing">CoverageProcessingException</A></PRE>
<DL>
<DD>Specifies the interpolation type to be used to interpolate values for points which fall
 between grid cells. The default value is nearest neighbor. The new interpolation type
 operates on all sample dimensions.
<P>
<DD><DL>
<DT><B>Parameters:</B><DD><CODE>source</CODE> - The source coverage.<DD><CODE>type</CODE> - The interpolation type. Possible values are ,
                and .
<DT><B>Throws:</B>
<DD><CODE><A HREF="../../../../org/geotools/coverage/processing/CoverageProcessingException.html" title="class in org.geotools.coverage.processing">CoverageProcessingException</A></CODE> - if the operation can't be applied.<DT><B>See Also:</B><DD><A HREF="../../../../org/geotools/coverage/processing/operation/Interpolate.html" title="class in org.geotools.coverage.processing.operation"><CODE>Interpolate</CODE></A></DL>
</DD>
</DL>
<HR>

<A NAME="interpolate(org.opengis.coverage.grid.GridCoverage, javax.media.jai.Interpolation)"><!-- --></A><H3>
interpolate</H3>
<PRE>
public GridCoverage <B>interpolate</B>(GridCoverage&nbsp;source,
                                <A HREF="http://java.sun.com/products/java-media/jai/forDevelopers/jai-apidocs/javax/media/jai/Interpolation.html" title="class or interface in javax.media.jai">Interpolation</A>&nbsp;type)
                                                   throws <A HREF="../../../../org/geotools/coverage/processing/CoverageProcessingException.html" title="class in org.geotools.coverage.processing">CoverageProcessingException</A></PRE>
<DL>
<DD>Specifies the interpolation type to be used to interpolate values for points which fall
 between grid cells. The default value is nearest neighbor. The new interpolation type
 operates on all sample dimensions.
<P>
<DD><DL>
<DT><B>Parameters:</B><DD><CODE>source</CODE> - The source coverage.<DD><CODE>type</CODE> - The interpolation type as a JAI interpolation object.
<DT><B>Throws:</B>
<DD><CODE><A HREF="../../../../org/geotools/coverage/processing/CoverageProcessingException.html" title="class in org.geotools.coverage.processing">CoverageProcessingException</A></CODE> - if the operation can't be applied.<DT><B>See Also:</B><DD><A HREF="../../../../org/geotools/coverage/processing/operation/Interpolate.html" title="class in org.geotools.coverage.processing.operation"><CODE>Interpolate</CODE></A></DL>
</DD>
</DL>
<HR>

<A NAME="interpolate(org.opengis.coverage.grid.GridCoverage, javax.media.jai.Interpolation[])"><!-- --></A><H3>
interpolate</H3>
<PRE>
public GridCoverage <B>interpolate</B>(GridCoverage&nbsp;source,
                                <A HREF="http://java.sun.com/products/java-media/jai/forDevelopers/jai-apidocs/javax/media/jai/Interpolation.html" title="class or interface in javax.media.jai">Interpolation</A>[]&nbsp;types)
                                                   throws <A HREF="../../../../org/geotools/coverage/processing/CoverageProcessingException.html" title="class in org.geotools.coverage.processing">CoverageProcessingException</A></PRE>
<DL>
<DD>Specifies the interpolation types to be used to interpolate values for points which fall
 between grid cells. The first element in the array is the primary interpolation. All other
 elements are fallback to be used if the primary interpolation returns a  value.
 See <A HREF="../../../../org/geotools/coverage/processing/operation/Interpolate.html" title="class in org.geotools.coverage.processing.operation"><CODE>Interpolate</CODE></A> operation for details.
<P>
<DD><DL>
<DT><B>Parameters:</B><DD><CODE>source</CODE> - The source coverage.<DD><CODE>types</CODE> - The interpolation types and their fallback.
<DT><B>Throws:</B>
<DD><CODE><A HREF="../../../../org/geotools/coverage/processing/CoverageProcessingException.html" title="class in org.geotools.coverage.processing">CoverageProcessingException</A></CODE> - if the operation can't be applied.<DT><B>See Also:</B><DD><A HREF="../../../../org/geotools/coverage/processing/operation/Interpolate.html" title="class in org.geotools.coverage.processing.operation"><CODE>Interpolate</CODE></A></DL>
</DD>
</DL>
<HR>

<A NAME="recolor(org.opengis.coverage.grid.GridCoverage, java.util.Map[])"><!-- --></A><H3>
recolor</H3>
<PRE>
public GridCoverage <B>recolor</B>(GridCoverage&nbsp;source,
                            <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;colorMaps)
                                               throws <A HREF="../../../../org/geotools/coverage/processing/CoverageProcessingException.html" title="class in org.geotools.coverage.processing">CoverageProcessingException</A></PRE>
<DL>
<DD>Recolors a coverage to the specified colormaps.
<P>
<DD><DL>
<DT><B>Parameters:</B><DD><CODE>source</CODE> - The source coverage.<DD><CODE>colorMaps</CODE> - The color maps to apply.
<DT><B>Throws:</B>
<DD><CODE><A HREF="../../../../org/geotools/coverage/processing/CoverageProcessingException.html" title="class in org.geotools.coverage.processing">CoverageProcessingException</A></CODE> - if the operation can't be applied.<DT><B>Since:</B></DT>
  <DD>2.3</DD>
<DT><B>See Also:</B><DD><A HREF="../../../../org/geotools/coverage/processing/operation/Recolor.html" title="class in org.geotools.coverage.processing.operation"><CODE>Recolor</CODE></A></DL>
</DD>
</DL>
<HR>

<A NAME="selectSampleDimension(org.opengis.coverage.Coverage, int[])"><!-- --></A><H3>
selectSampleDimension</H3>
<PRE>
public Coverage <B>selectSampleDimension</B>(Coverage&nbsp;source,
                                      int[]&nbsp;sampleDimensions)
                                                    throws <A HREF="../../../../org/geotools/coverage/processing/CoverageProcessingException.html" title="class in org.geotools.coverage.processing">CoverageProcessingException</A></PRE>
<DL>
<DD>Chooses <var>N</var> <A HREF="../../../../org/geotools/coverage/GridSampleDimension.html" title="class in org.geotools.coverage">sample dimensions</A>
 from a coverage and copies their sample data to the destination grid coverage in the order
 specified.
<P>
<DD><DL>
<DT><B>Parameters:</B><DD><CODE>source</CODE> - The source coverage.<DD><CODE>sampleDimensions</CODE> - The sample dimensions to select.
<DT><B>Throws:</B>
<DD><CODE><A HREF="../../../../org/geotools/coverage/processing/CoverageProcessingExcepti