geotoolsreadparams.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

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<A NAME="GeoToolsReadParams()"><!-- --></A><H3>
GeoToolsReadParams</H3>
<PRE>
public <B>GeoToolsReadParams</B>()</PRE>
<DL>
<DD>Default contructor.
<P>
</DL>

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<A NAME="getTileWidth()"><!-- --></A><H3>
getTileWidth</H3>
<PRE>
public int <B>getTileWidth</B>()</PRE>
<DL>
<DD>Returns the width of each tile in an raster as it will be reader If
 tiling parameters have not been set, an
 <code>IllegalStateException</code> is thrown.
<P>
<DD><DL>

<DT><B>Returns:</B><DD>the tile width to be used for decoding.
<DT><B>Throws:</B>
<DD><CODE><A HREF="http://java.sun.com/j2se/1.4/docs/api/java/lang/IllegalStateException.html" title="class or interface in java.lang">IllegalStateException</A></CODE> - if the tiling parameters have not been set.<DT><B>See Also:</B><DD><CODE>#setTiling(int, int, int, int)</CODE>, 
<A HREF="../../../../org/geotools/image/imageio/GeoToolsReadParams.html#getTileHeight()"><CODE>getTileHeight()</CODE></A></DL>
</DD>
</DL>
<HR>

<A NAME="getTileHeight()"><!-- --></A><H3>
getTileHeight</H3>
<PRE>
public int <B>getTileHeight</B>()</PRE>
<DL>
<DD>Returns the width of each tile in an raster as it will be reader If
 tiling parameters have not been set, an
 <code>IllegalStateException</code> is thrown.
<P>
<DD><DL>

<DT><B>Returns:</B><DD>the tile height to be used for decoding.
<DT><B>Throws:</B>
<DD><CODE><A HREF="http://java.sun.com/j2se/1.4/docs/api/java/lang/IllegalStateException.html" title="class or interface in java.lang">IllegalStateException</A></CODE> - if the tiling parameters have not been set.<DT><B>See Also:</B><DD><CODE>#setTiling(int, int, int, int)</CODE>, 
<A HREF="../../../../org/geotools/image/imageio/GeoToolsReadParams.html#getTileWidth()"><CODE>getTileWidth()</CODE></A></DL>
</DD>
</DL>
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<A NAME="setTiling(int, int)"><!-- --></A><H3>
setTiling</H3>
<PRE>
public void <B>setTiling</B>(int&nbsp;tileWidth,
                      int&nbsp;tileHeight)</PRE>
<DL>
<DD>Specifies that the image should be tiled. The <code>tileWidth</code>
 and <code>tileHeight</code> parameters specify the width and height of
 the tiles in memory. If the tile width or height is greater than the
 width or height of the image, the image is not tiled in that dimension.
<P>
<DD><DL>
<DT><B>Parameters:</B><DD><CODE>tileWidth</CODE> - the width of each tile.<DD><CODE>tileHeight</CODE> - the height of each tile.
<DT><B>Throws:</B>
<DD><CODE><A HREF="http://java.sun.com/j2se/1.4/docs/api/java/lang/IllegalArgumentException.html" title="class or interface in java.lang">IllegalArgumentException</A></CODE> - if the tile size is not within one of the allowable ranges
                returned by <code>getPreferredTileSizes</code>.
<DD><CODE><A HREF="http://java.sun.com/j2se/1.4/docs/api/java/lang/IllegalArgumentException.html" title="class or interface in java.lang">IllegalArgumentException</A></CODE> - if <code>tileWidth</code> or <code>tileHeight</code>
                is less than or equal to 0.<DT><B>See Also:</B><DD><CODE>#canWriteTiles</CODE>, 
<CODE>#canOffsetTiles</CODE>, 
<A HREF="../../../../org/geotools/image/imageio/GeoToolsReadParams.html#getTileWidth()"><CODE>getTileWidth()</CODE></A>, 
<A HREF="../../../../org/geotools/image/imageio/GeoToolsReadParams.html#getTileHeight()"><CODE>getTileHeight()</CODE></A>, 
<CODE>#getTileGridXOffset()</CODE>, 
<CODE>#getTileGridYOffset()</CODE></DL>
</DD>
</DL>
<HR>

<A NAME="getPreferredTileSizes()"><!-- --></A><H3>
getPreferredTileSizes</H3>
<PRE>
public <A HREF="http://java.sun.com/j2se/1.4/docs/api/java/awt/Dimension.html" title="class or interface in java.awt">Dimension</A>[] <B>getPreferredTileSizes</B>()</PRE>
<DL>
<DD>Returns an array of <code>Dimension</code>s indicating the legal size
 ranges for tiles. The returned array is a copy.
 
 <p>
 The information is returned as a set of pairs; the first element of a
 pair contains an (inclusive) minimum width and height, and the second
 element contains an (inclusive) maximum width and height. Together, each
 pair defines a valid range of sizes. To specify a fixed size, use the
 same width and height for both elements. To specify an arbitrary range, a
 value of <code>null</code> is used in place of an actual array of
 <code>Dimension</code>s.
 
 <p>
 If no array is specified on the constructor, but tiling is allowed, then
 this method returns <code>null</code>.
<P>
<DD><DL>

<DT><B>Returns:</B><DD>an array of <code>Dimension</code>s with an even length of at
         least two, or <code>null</code>.
<DT><B>Throws:</B>
<DD><CODE><A HREF="http://java.sun.com/j2se/1.4/docs/api/java/lang/UnsupportedOperationException.html" title="class or interface in java.lang">UnsupportedOperationException</A></CODE> - if the plug-in does not support tiling.</DL>
</DD>
</DL>
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