rastersymbolizer.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

<A NAME="setColorMap(org.geotools.styling.ColorMap)"><!-- --></A><H3>
setColorMap</H3>
<PRE>
public void <B>setColorMap</B>(<A HREF="../../../org/geotools/styling/ColorMap.html" title="interface in org.geotools.styling">ColorMap</A>&nbsp;colorMap)</PRE>
<DL>
<DD>The ColorMap element defines either the colors of a palette-type raster
 source or the mapping of fixed-numeric pixel values to colors. For
 example, a DEM raster giving elevations in meters above sea level can
 be translated to a colored image with a ColorMap.  The quantity
 attributes of a color-map are used for translating between numeric
 matrixes and color rasters and the ColorMap entries should be in order
 of increasing numeric quantity so that intermediate numeric values can
 be matched to a color (or be interpolated between two colors). Labels
 may be used for legends or may be used in the future to match character
 values. Not all systems can support opacity in colormaps.  The default
 opacity is 1.0 (fully opaque). Defaults for quantity and label are
 system-dependent.
<P>
<DD><DL>
</DL>
</DD>
<DD><DL>
<DT><B>Parameters:</B><DD><CODE>colorMap</CODE> - the ColorMap for the raster</DL>
</DD>
</DL>
<HR>

<A NAME="getColorMap()"><!-- --></A><H3>
getColorMap</H3>
<PRE>
public <A HREF="../../../org/geotools/styling/ColorMap.html" title="interface in org.geotools.styling">ColorMap</A> <B>getColorMap</B>()</PRE>
<DL>
<DD>The ColorMap element defines either the colors of a palette-type raster
 source or the mapping of  fixed-numeric pixel values to colors.  For
 example, a DEM raster giving elevations in meters above sea level can
 be translated to a colored  image with a ColorMap.  The quantity
 attributes of a color-map are used for translating between numeric
 matrixes and color rasters and the ColorMap entries should be in order
 of increasing numeric quantity so  that intermediate numeric values can
 be matched to a color (or be interpolated between two colors).   Labels
 may be used for legends or may be used in the future to match character
 values.   Not all systems can support opacity in colormaps.  The
 default opacity is 1.0 (fully opaque).   Defaults for quantity and
 label are system-dependent.
<P>
<DD><DL>
</DL>
</DD>
<DD><DL>

<DT><B>Returns:</B><DD>the ColorMap for the raster</DL>
</DD>
</DL>
<HR>

<A NAME="setContrastEnhancement(org.geotools.styling.ContrastEnhancement)"><!-- --></A><H3>
setContrastEnhancement</H3>
<PRE>
public void <B>setContrastEnhancement</B>(<A HREF="../../../org/geotools/styling/ContrastEnhancement.html" title="interface in org.geotools.styling">ContrastEnhancement</A>&nbsp;ce)</PRE>
<DL>
<DD>The ContrastEnhancement element defines contrast enhancement for a
 channel of a false-color image or for a color image. In the case of a
 color image, the relative grayscale brightness of a pixel color is
 used. ?Normalize? means to stretch the contrast so that the dimmest
 color is stretched to black and the brightest color is stretched to
 white, with all colors in between stretched out linearly. ?Histogram?
 means to stretch the contrast based on a histogram of how many colors
 are at each brightness level on input, with the goal of producing equal
 number of pixels in the image at each brightness level on output.  This
 has the effect of revealing many subtle ground features. A ?GammaValue?
 tells how much to brighten (value greater than 1.0) or dim (value less
 than 1.0) an image. The default GammaValue is 1.0 (no change). If none
 of Normalize, Histogram, or GammaValue are selected in a
 ContrastEnhancement, then no enhancement is performed.
<P>
<DD><DL>
</DL>
</DD>
<DD><DL>
<DT><B>Parameters:</B><DD><CODE>ce</CODE> - the contrastEnhancement</DL>
</DD>
</DL>
<HR>

<A NAME="getContrastEnhancement()"><!-- --></A><H3>
getContrastEnhancement</H3>
<PRE>
public <A HREF="../../../org/geotools/styling/ContrastEnhancement.html" title="interface in org.geotools.styling">ContrastEnhancement</A> <B>getContrastEnhancement</B>()</PRE>
<DL>
<DD>The ContrastEnhancement element defines contrast enhancement for a
 channel of a false-color image or  for a color image. In the case of a
 color image, the relative grayscale brightness of a pixel color is
 used.  ?Normalize? means to stretch the contrast so that the dimmest
 color is stretched to black and  the brightest color is stretched to
 white, with all colors in between stretched out linearly.   ?Histogram?
 means to stretch the contrast based on a histogram of how many colors
 are at  each brightness level on input, with the goal of producing
 equal number of pixels in the image at each brightness level on output.
 This has the effect of revealing many subtle ground features.   A
 ?GammaValue? tells how much to brighten (value greater than 1.0) or dim
 (value less than 1.0) an image. The default GammaValue is 1.0 (no
 change). If none of Normalize, Histogram, or GammaValue are selected in
 a ContrastEnhancement, then no enhancement is performed.
<P>
<DD><DL>
</DL>
</DD>
<DD><DL>

<DT><B>Returns:</B><DD>the ContrastEnhancement</DL>
</DD>
</DL>
<HR>

<A NAME="setShadedRelief(org.geotools.styling.ShadedRelief)"><!-- --></A><H3>
setShadedRelief</H3>
<PRE>
public void <B>setShadedRelief</B>(<A HREF="../../../org/geotools/styling/ShadedRelief.html" title="interface in org.geotools.styling">ShadedRelief</A>&nbsp;relief)</PRE>
<DL>
<DD>The ShadedRelief element selects the application of relief shading (or
 ?hill shading?) to an image for a three-dimensional visual effect.  It
 is defined as: Exact parameters of the shading are system-dependent
 (for now).  If the BrightnessOnly flag is ?0? (false, default), the
 shading is applied to the layer being rendered as the current
 RasterSymbol. If BrightnessOnly is ?1? (true), the shading is applied
 to the brightness of the colors in the rendering canvas generated so
 far by other layers, with the effect of relief-shading these other
 layers. The default for BrightnessOnly is ?0? (false).  The
 ReliefFactor gives the amount of exaggeration to use for the height of
 the ?hills.?  A value of around 55 (times) gives reasonable results for
 Earth-based DEMs. The default value is system-dependent.
<P>
<DD><DL>
</DL>
</DD>
<DD><DL>
<DT><B>Parameters:</B><DD><CODE>relief</CODE> - the shadedrelief object</DL>
</DD>
</DL>
<HR>

<A NAME="getShadedRelief()"><!-- --></A><H3>
getShadedRelief</H3>
<PRE>
public <A HREF="../../../org/geotools/styling/ShadedRelief.html" title="interface in org.geotools.styling">ShadedRelief</A> <B>getShadedRelief</B>()</PRE>
<DL>
<DD>The ShadedRelief element selects the application of relief shading (or
 ?hill shading?) to an image for  a three-dimensional visual effect.  It
 is defined as: Exact parameters of the shading are system-dependent
 (for now).  If the BrightnessOnly flag is ?0?  (false, default), the
 shading is applied to the layer being rendered as the current
 RasterSymbol. If BrightnessOnly is ?1? (true), the shading is applied
 to the brightness of the colors in the rendering canvas generated so
 far by other layers, with the effect of relief-shading these other
 layers. The default for BrightnessOnly is ?0? (false).  The
 ReliefFactor gives the amount of exaggeration to  use for the height of
 the ?hills.?  A value of around 55 (times) gives reasonable results for
 Earth-based DEMs. The default value is system-dependent.
<P>
<DD><DL>
</DL>
</DD>
<DD><DL>

<DT><B>Returns:</B><DD>the shadedrelief object</DL>
</DD>
</DL>
<HR>

<A NAME="setImageOutline(org.geotools.styling.Symbolizer)"><!-- --></A><H3>
setImageOutline</H3>
<PRE>
public void <B>setImageOutline</B>(<A HREF="../../../org/geotools/styling/Symbolizer.html" title="interface in org.geotools.styling">Symbolizer</A>&nbsp;symbolizer)</PRE>
<DL>
<DD>The ImageOutline element specifies that individual source rasters in a
 multi-raster set (such as a set of satellite-image scenes) should be
 outlined with either a LineStringSymbol or PolygonSymbol. It is defined
 as:
 <pre>
 &lt;xs:element name="ImageOutline"&gt;
   &lt;xs:complexType&gt;
     &lt;xs:choice&gt;
       &lt;xs:element ref="sld:LineSymbolizer"/&gt;
       &lt;xs:element ref="sld:PolygonSymbolizer"/&gt;
     &lt;/xs:choice&gt;
   &lt;/xs:complexType&gt;
 &lt;/xs:element&gt;
 </pre>
 An Opacity of 0.0 can be selected for the main raster to avoid rendering
 the main-raster pixels, or an opacity can be used for a
 PolygonSymbolizer Fill to allow the main-raster data be visible through
 the fill.
<P>
<DD><DL>
</DL>
</DD>
<DD><DL>
<DT><B>Parameters:</B><DD><CODE>symbolizer</CODE> - the symbolizer to be used. If this is <B>not</B> a
        polygon or a line symbolizer an unexpected argument exception
        may be thrown by an implementing class.</DL>
</DD>
</DL>
<HR>

<A NAME="getImageOutline()"><!-- --></A><H3>
getImageOutline</H3>
<PRE>
public <A HREF="../../../org/geotools/styling/Symbolizer.html" title="interface in org.geotools.styling">Symbolizer</A> <B>getImageOutline</B>()</PRE>
<DL>
<DD>The ImageOutline element specifies that individual source rasters in a
 multi-raster set (such as a  set of satellite-image scenes) should be
 outlined with either a LineStringSymbol or PolygonSymbol.  It is
 defined as:
 <pre>
 &lt;xs:element name="ImageOutline"&gt;
   &lt;xs:complexType&gt;
     &lt;xs:choice&gt;
       &lt;xs:element ref="sld:LineSymbolizer"/&gt;
       &lt;xs:element ref="sld:PolygonSymbolizer"/&gt;
     &lt;/xs:choice&gt;
   &lt;/xs:complexType&gt;
 &lt;/xs:element&gt;
 </pre>
 An Opacity of 0.0 can be selected for the main raster to avoid rendering
 the main-raster pixels, or  an opacity can be used for a
 PolygonSymbolizer Fill to allow the main-raster data be visible through
 the fill.
<P>
<DD><DL>
</DL>
</DD>
<DD><DL>

<DT><B>Returns:</B><DD>The relevent symbolizer</DL>
</DD>
</DL>
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