| RasterSymbolizer.java |
/*
* GeoTools - The Open Source Java GIS Toolkit
* http://geotools.org
*
* (C) 2002-2008, Open Source Geospatial Foundation (OSGeo)
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation;
* version 2.1 of the License.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*/
package org.geotools.styling;
import org.opengis.filter.expression.Expression;
import org.opengis.style.OverlapBehavior;
/**
* The RasterSymbolizer describes how to render raster/matrix-coverage data
* (e.g., satellite photos, DEMs).
*
* <p>
* The details of this object are taken from the <a
* href="https://portal.opengeospatial.org/files/?artifact_id=1188"> OGC
* Styled-Layer Descriptor Report (OGC 02-070) version 1.0.0.</a>:
* <pre><code>
* <xs:element name="RasterSymbolizer">
* <xs:complexType>
* <xs:sequence>
* <xs:element ref="sld:Geometry" minOccurs="0"/>
* <xs:element ref="sld:Opacity" minOccurs="0"/>
* <xs:element ref="sld:ChannelSelection" minOccurs="0"/>
* <xs:element ref="sld:OverlapBehavior" minOccurs="0"/>
* <xs:element ref="sld:ColorMap" minOccurs="0"/>
* <xs:element ref="sld:ContrastEnhancement" minOccurs="0"/>
* <xs:element ref="sld:ShadedRelief" minOccurs="0"/>
* <xs:element ref="sld:ImageOutline" minOccurs="0"/>
* </xs:sequence>
* </xs:complexType>
* </xs:element>
* </code></pre>
* The following example applies a coloring to elevation (DEM) data (quantities
* are in meters):
* <pre>
* <RasterSymbolizer>
* <Opacity>1.0</Opacity>
* <ColorMap>
* <ColorMapEntry color="#00ff00" quantity="-500"/>
* <ColorMapEntry color="#00fa00" quantity="-417"/>
* <ColorMapEntry color="#14f500" quantity="-333"/>
* <ColorMapEntry color="#28f502" quantity="-250"/>
* <ColorMapEntry color="#3cf505" quantity="-167"/>
* <ColorMapEntry color="#50f50a" quantity="-83"/>
* <ColorMapEntry color="#64f014" quantity="-1"/>
* <ColorMapEntry color="#7deb32" quantity="0"/>
* <ColorMapEntry color="#78c818" quantity="30"/>
* <ColorMapEntry color="#38840c" quantity="105"/>
* <ColorMapEntry color="#2c4b04" quantity="300"/>
* <ColorMapEntry color="#ffff00" quantity="400"/>
* <ColorMapEntry color="#dcdc00" quantity="700"/>
* <ColorMapEntry color="#b47800" quantity="1200"/>
* <ColorMapEntry color="#c85000" quantity="1400"/>
* <ColorMapEntry color="#be4100" quantity="1600"/>
* <ColorMapEntry color="#963000" quantity="2000"/>
* <ColorMapEntry color="#3c0200" quantity="3000"/>
* <ColorMapEntry color="#ffffff" quantity="5000"/>
* <ColorMapEntry color="#ffffff" quantity="13000"/>
* </ColorMap>
* <OverlapBehavior>
* <AVERAGE/>
* </OverlapBehavior>
* <ShadedRelief/>
* </RasterSymbolizer>
* </pre>
* Here is a rather artificial mutli-band raster symbol:
* <pre>
* <RasterSymbolizer>
* <Opacity>1.0</Opacity>
* <ColorMap>
* <ColorMapEntry color="#000000" quantity="0"/>
* <ColorMapEntry color="#ffffff" quantity="255"/>
* </ColorMap>
* <ChannelSelection>
* <RedChannel>
* <SourceChannelName>1</SourceChannelName>
* <ContrastEnhancement>
* <Histogram/>
* </ContrastEnhancement>
* </RedChannel>
* <GreenChannel>
* <SourceChannelName>2</SourceChannelName>
* <ContrastEnhancement>
* <GammaValue>2.5</GammaValue>
* </ContrastEnhancement>
* </GreenChannel>
* <BlueChannel>
* <SourceChannelName>3</SourceChannelName>
* <ContrastEnhancement>
* <Normalize/>
* </ContrastEnhancement>
* </BlueChannel>
* </ChannelSelection>
* <OverlapBehavior>
* <LATEST_ON_TOP/>
* </OverlapBehavior>
* <ContrastEnhancement>
* <GammaValue>1.0</GammaValue>
* </ContrastEnhancement>
* </RasterSymbolizer>
* </PRE>
* $Id: RasterSymbolizer.java 34561 2009-11-30 12:05:53Z aaime $
* </p>
*
* @author Ian Turton, CCG
* @source $URL: http://svn.osgeo.org/geotools/tags/2.7-M3/modules/library/api/src/main/java/org/geotools/styling/RasterSymbolizer.java $
*/
public interface RasterSymbolizer extends org.opengis.style.RasterSymbolizer,Symbolizer {
/**
* sets the opacity for the coverage, it has the usual meaning.
*
* @param opacity An expression which evaluates to the the opacity (0-1)
*/
void setOpacity(Expression opacity);
/**
* The ChannelSelection element specifies the false-color channel selection
* for a multi-spectral raster source (such as a multi-band
* satellite-imagery source). Either a channel may be selected to display
* in each of red, green, and blue, or a single channel may be selected to
* display in grayscale. (The spelling ?gray? is used since it seems to
* be more common on the Web than ?grey? by a ratio of about 3:1.)
* Contrast enhancement may be applied to each channel in isolation.
* Channels are identified by a system and data-dependent character
* identifier. Commonly, channels will be labelled as ?1?, ?2?, etc.
*
* @param channel the channel selected
*/
void setChannelSelection(org.opengis.style.ChannelSelection channel);
/**
* The ChannelSelection element specifies the false-color channel selection
* for a multi-spectral raster source (such as a multi-band
* satellite-imagery source). Either a channel may be selected to
* display in each of red, green, and blue, or a single channel may be
* selected to display in grayscale. (The spelling ?gray? is used since
* it seems to be more common on the Web than ?grey? by a ratio of about
* 3:1.) Contrast enhancement may be applied to each channel in isolation.
* Channels are identified by a system and data-dependent character
* identifier. Commonly, channels will be labelled as ?1?, ?2?, etc.
*
* @return the ChannelSelection object set or null if none is available.
*/
ChannelSelection getChannelSelection();
/**
* The OverlapBehavior element tells a system how to behave when multiple
* raster images in a layer overlap each other, for example with
* satellite-image scenes. LATEST_ON_TOP and EARLIEST_ON_TOP refer to the
* time the scene was captured. AVERAGE means to average multiple scenes
* together. This can produce blurry results if the source images are not
* perfectly aligned in their geo-referencing. RANDOM means to select an
* image (or piece thereof) randomly and place it on top. This can
* produce crisper results than AVERAGE potentially more efficiently than
* LATEST_ON_TOP or EARLIEST_ON_TOP. The default behaviour is
* system-dependent.
*
* @param overlap the expression which evaluates to LATEST_ON_TOP,
* EARLIEST_ON_TOP, AVERAGE or RANDOM
*/
void setOverlap(Expression overlap);
/**
* The OverlapBehavior element tells a system how to behave when multiple
* raster images in a layer overlap each other, for example with
* satellite-image scenes. LATEST_ON_TOP and EARLIEST_ON_TOP refer to the
* time the scene was captured. AVERAGE means to average multiple scenes
* together. This can produce blurry results if the source images are
* not perfectly aligned in their geo-referencing. RANDOM means to select
* an image (or piece thereof) randomly and place it on top. This can
* produce crisper results than AVERAGE potentially more efficiently than
* LATEST_ON_TOP or EARLIEST_ON_TOP. The default behaviour is
* system-dependent.
*
* @return The expression which evaluates to LATEST_ON_TOP,
* EARLIEST_ON_TOP, AVERAGE or RANDOM
*/
Expression getOverlap();
/**
* Set the overlap behavior.
* @param overlapBehavior
*/
void setOverlapBehavior(OverlapBehavior overlapBehavior);
/**
* 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.
*
* @param colorMap the ColorMap for the raster
*/
void setColorMap(org.opengis.style.ColorMap colorMap);
/**
* 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.
*
* @return the ColorMap for the raster
*/
ColorMap getColorMap();
/**
* 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.
*
* @param ce the contrastEnhancement
*/
void setContrastEnhancement(org.opengis.style.ContrastEnhancement ce);
/**
* 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.
*
* @return the ContrastEnhancement
*/
ContrastEnhancement getContrastEnhancement();
/**
* 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.
*
* @param relief the shadedrelief object
*/
void setShadedRelief(org.opengis.style.ShadedRelief relief);
/**
* 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.
*
* @return the shadedrelief object
*/
ShadedRelief getShadedRelief();
/**
* 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>
* <xs:element name="ImageOutline">
* <xs:complexType>
* <xs:choice>
* <xs:element ref="sld:LineSymbolizer"/>
* <xs:element ref="sld:PolygonSymbolizer"/>
* </xs:choice>
* </xs:complexType>
* </xs:element>
* </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.
*
* @param symbolizer 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.
*/
void setImageOutline(org.opengis.style.Symbolizer symbolizer);
/**
* 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>
* <xs:element name="ImageOutline">
* <xs:complexType>
* <xs:choice>
* <xs:element ref="sld:LineSymbolizer"/>
* <xs:element ref="sld:PolygonSymbolizer"/>
* </xs:choice>
* </xs:complexType>
* </xs:element>
* </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.
*
* @return The relevent symbolizer
*/
Symbolizer getImageOutline();
}