gridcoverage2d.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

public <A HREF="http://java.sun.com/j2se/1.4/docs/api/java/lang/Object.html" title="class or interface in java.lang">Object</A> <B>evaluate</B>(DirectPosition&nbsp;point)
                throws CannotEvaluateException</PRE>
<DL>
<DD>Return the value vector for a given point in the coverage.
 A value for each sample dimension is included in the vector.
<P>
<DD><DL>
<DT><B>Specified by:</B><DD><CODE>evaluate</CODE> in interface <CODE>Coverage</CODE></DL>
</DD>
<DD><DL>

<DT><B>Throws:</B>
<DD><CODE>CannotEvaluateException</CODE></DL>
</DD>
</DL>
<HR>

<A NAME="evaluate(org.opengis.spatialschema.geometry.DirectPosition, byte[])"><!-- --></A><H3>
evaluate</H3>
<PRE>
public byte[] <B>evaluate</B>(DirectPosition&nbsp;coord,
                       byte[]&nbsp;dest)
                throws CannotEvaluateException</PRE>
<DL>
<DD>Returns a sequence of byte values for a given point in the coverage.
<P>
<DD><DL>
<DT><B>Specified by:</B><DD><CODE>evaluate</CODE> in interface <CODE>Coverage</CODE><DT><B>Overrides:</B><DD><CODE><A HREF="../../../../org/geotools/coverage/AbstractCoverage.html#evaluate(org.opengis.spatialschema.geometry.DirectPosition, byte[])">evaluate</A></CODE> in class <CODE><A HREF="../../../../org/geotools/coverage/AbstractCoverage.html" title="class in org.geotools.coverage">AbstractCoverage</A></CODE></DL>
</DD>
<DD><DL>
<DT><B>Parameters:</B><DD><CODE>coord</CODE> - The coordinate point where to evaluate.<DD><CODE>dest</CODE> - An array in which to store values, or .
<DT><B>Returns:</B><DD>An array containing values.
<DT><B>Throws:</B>
<DD><CODE>CannotEvaluateException</CODE> - if the values can't be computed at the specified coordinate.
         More specifically, <CODE>PointOutsideCoverageException</CODE> is thrown if the evaluation
         failed because the input point has invalid coordinates.</DL>
</DD>
</DL>
<HR>

<A NAME="evaluate(org.opengis.spatialschema.geometry.DirectPosition, int[])"><!-- --></A><H3>
evaluate</H3>
<PRE>
public int[] <B>evaluate</B>(DirectPosition&nbsp;coord,
                      int[]&nbsp;dest)
               throws CannotEvaluateException</PRE>
<DL>
<DD>Returns a sequence of integer values for a given point in the coverage.
<P>
<DD><DL>
<DT><B>Specified by:</B><DD><CODE>evaluate</CODE> in interface <CODE>Coverage</CODE><DT><B>Overrides:</B><DD><CODE><A HREF="../../../../org/geotools/coverage/AbstractCoverage.html#evaluate(org.opengis.spatialschema.geometry.DirectPosition, int[])">evaluate</A></CODE> in class <CODE><A HREF="../../../../org/geotools/coverage/AbstractCoverage.html" title="class in org.geotools.coverage">AbstractCoverage</A></CODE></DL>
</DD>
<DD><DL>
<DT><B>Parameters:</B><DD><CODE>coord</CODE> - The coordinate point where to evaluate.<DD><CODE>dest</CODE> - An array in which to store values, or .
<DT><B>Returns:</B><DD>An array containing values.
<DT><B>Throws:</B>
<DD><CODE>CannotEvaluateException</CODE> - if the values can't be computed at the specified coordinate.
         More specifically, <CODE>PointOutsideCoverageException</CODE> is thrown if the evaluation
         failed because the input point has invalid coordinates.</DL>
</DD>
</DL>
<HR>

<A NAME="evaluate(org.opengis.spatialschema.geometry.DirectPosition, float[])"><!-- --></A><H3>
evaluate</H3>
<PRE>
public float[] <B>evaluate</B>(DirectPosition&nbsp;coord,
                        float[]&nbsp;dest)
                 throws CannotEvaluateException</PRE>
<DL>
<DD>Returns a sequence of float values for a given point in the coverage.
<P>
<DD><DL>
<DT><B>Specified by:</B><DD><CODE>evaluate</CODE> in interface <CODE>Coverage</CODE><DT><B>Overrides:</B><DD><CODE><A HREF="../../../../org/geotools/coverage/AbstractCoverage.html#evaluate(org.opengis.spatialschema.geometry.DirectPosition, float[])">evaluate</A></CODE> in class <CODE><A HREF="../../../../org/geotools/coverage/AbstractCoverage.html" title="class in org.geotools.coverage">AbstractCoverage</A></CODE></DL>
</DD>
<DD><DL>
<DT><B>Parameters:</B><DD><CODE>coord</CODE> - The coordinate point where to evaluate.<DD><CODE>dest</CODE> - An array in which to store values, or .
<DT><B>Returns:</B><DD>An array containing values.
<DT><B>Throws:</B>
<DD><CODE>CannotEvaluateException</CODE> - if the values can't be computed at the specified coordinate.
         More specifically, <CODE>PointOutsideCoverageException</CODE> is thrown if the evaluation
         failed because the input point has invalid coordinates.</DL>
</DD>
</DL>
<HR>

<A NAME="evaluate(org.opengis.spatialschema.geometry.DirectPosition, double[])"><!-- --></A><H3>
evaluate</H3>
<PRE>
public double[] <B>evaluate</B>(DirectPosition&nbsp;coord,
                         double[]&nbsp;dest)
                  throws CannotEvaluateException</PRE>
<DL>
<DD>Returns a sequence of double values for a given point in the coverage.
<P>
<DD><DL>
<DT><B>Specified by:</B><DD><CODE>evaluate</CODE> in interface <CODE>Coverage</CODE><DT><B>Overrides:</B><DD><CODE><A HREF="../../../../org/geotools/coverage/AbstractCoverage.html#evaluate(org.opengis.spatialschema.geometry.DirectPosition, double[])">evaluate</A></CODE> in class <CODE><A HREF="../../../../org/geotools/coverage/AbstractCoverage.html" title="class in org.geotools.coverage">AbstractCoverage</A></CODE></DL>
</DD>
<DD><DL>
<DT><B>Parameters:</B><DD><CODE>coord</CODE> - The coordinate point where to evaluate.<DD><CODE>dest</CODE> - An array in which to store values, or .
<DT><B>Returns:</B><DD>An array containing values.
<DT><B>Throws:</B>
<DD><CODE>CannotEvaluateException</CODE> - if the values can't be computed at the specified coordinate.
         More specifically, <CODE>PointOutsideCoverageException</CODE> is thrown if the evaluation
         failed because the input point has invalid coordinates.</DL>
</DD>
</DL>
<HR>

<A NAME="evaluate(java.awt.geom.Point2D, int[])"><!-- --></A><H3>
evaluate</H3>
<PRE>
public int[] <B>evaluate</B>(<A HREF="http://java.sun.com/j2se/1.4/docs/api/java/awt/geom/Point2D.html" title="class or interface in java.awt.geom">Point2D</A>&nbsp;coord,
                      int[]&nbsp;dest)
               throws CannotEvaluateException</PRE>
<DL>
<DD>Returns a sequence of integer values for a given two-dimensional point in the coverage.
<P>
<DD><DL>
</DL>
</DD>
<DD><DL>
<DT><B>Parameters:</B><DD><CODE>coord</CODE> - The coordinate point where to evaluate.<DD><CODE>dest</CODE> - An array in which to store values, or .
<DT><B>Returns:</B><DD>An array containing values.
<DT><B>Throws:</B>
<DD><CODE>CannotEvaluateException</CODE> - if the values can't be computed at the specified coordinate.
         More specifically, <CODE>PointOutsideCoverageException</CODE> is thrown if the evaluation
         failed because the input point has invalid coordinates.</DL>
</DD>
</DL>
<HR>

<A NAME="evaluate(java.awt.geom.Point2D, float[])"><!-- --></A><H3>
evaluate</H3>
<PRE>
public float[] <B>evaluate</B>(<A HREF="http://java.sun.com/j2se/1.4/docs/api/java/awt/geom/Point2D.html" title="class or interface in java.awt.geom">Point2D</A>&nbsp;coord,
                        float[]&nbsp;dest)
                 throws CannotEvaluateException</PRE>
<DL>
<DD>Returns a sequence of float values for a given two-dimensional point in the coverage.
<P>
<DD><DL>
</DL>
</DD>
<DD><DL>
<DT><B>Parameters:</B><DD><CODE>coord</CODE> - The coordinate point where to evaluate.<DD><CODE>dest</CODE> - An array in which to store values, or .
<DT><B>Returns:</B><DD>An array containing values.
<DT><B>Throws:</B>
<DD><CODE>CannotEvaluateException</CODE> - if the values can't be computed at the specified coordinate.
         More specifically, <CODE>PointOutsideCoverageException</CODE> is thrown if the evaluation
         failed because the input point has invalid coordinates.</DL>
</DD>
</DL>
<HR>

<A NAME="evaluate(java.awt.geom.Point2D, double[])"><!-- --></A><H3>
evaluate</H3>
<PRE>
public double[] <B>evaluate</B>(<A HREF="http://java.sun.com/j2se/1.4/docs/api/java/awt/geom/Point2D.html" title="class or interface in java.awt.geom">Point2D</A>&nbsp;coord,
                         double[]&nbsp;dest)
                  throws CannotEvaluateException</PRE>
<DL>
<DD>Returns a sequence of double values for a given two-dimensional point in the coverage.
<P>
<DD><DL>
</DL>
</DD>
<DD><DL>
<DT><B>Parameters:</B><DD><CODE>coord</CODE> - The coordinate point where to evaluate.<DD><CODE>dest</CODE> - An array in which to store values, or .
<DT><B>Returns:</B><DD>An array containing values.
<DT><B>Throws:</B>
<DD><CODE>CannotEvaluateException</CODE> - if the values can't be computed at the specified coordinate.
         More specifically, <CODE>PointOutsideCoverageException</CODE> is thrown if the evaluation
         failed because the input point has invalid coordinates.</DL>
</DD>
</DL>
<HR>

<A NAME="getDebugString(org.opengis.spatialschema.geometry.DirectPosition)"><!-- --></A><H3>
getDebugString</H3>
<PRE>
public <A HREF="http://java.sun.com/j2se/1.4/docs/api/java/lang/String.html" title="class or interface in java.lang">String</A> <B>getDebugString</B>(DirectPosition&nbsp;coord)</PRE>
<DL>
<DD>Returns a debug string for the specified coordinate.   This method produces a
 string with pixel coordinates and pixel values for all bands (with geophysics
 values or category name in parenthesis). Example for a 1-banded image:

 <blockquote><pre>(1171,1566)=[196 (29.6 癈)]</pre></blockquote>
<P>
<DD><DL>
</DL>
</DD>
<DD><DL>
<DT><B>Parameters:</B><DD><CODE>coord</CODE> - The coordinate point where to evaluate.
<DT><B>Returns:</B><DD>A string with pixel coordinates and pixel values at the specified location,
         or  if  is outside coverage.</DL>
</DD>
</DL>
<HR>

<A NAME="getOptimalDataBlockSizes()"><!-- --></A><H3>
getOptimalDataBlockSizes</H3>
<PRE>
public int[] <B>getOptimalDataBlockS