001 /*
002 * GeoAPI - Java interfaces for OGC/ISO standards
003 * http://www.geoapi.org
004 *
005 * Copyright (C) 2008-2012 Open Geospatial Consortium, Inc.
006 * All Rights Reserved. http://www.opengeospatial.org/ogc/legal
007 *
008 * Permission to use, copy, and modify this software and its documentation, with
009 * or without modification, for any purpose and without fee or royalty is hereby
010 * granted, provided that you include the following on ALL copies of the software
011 * and documentation or portions thereof, including modifications, that you make:
012 *
013 * 1. The full text of this NOTICE in a location viewable to users of the
014 * redistributed or derivative work.
015 * 2. Notice of any changes or modifications to the OGC files, including the
016 * date changes were made.
017 *
018 * THIS SOFTWARE AND DOCUMENTATION IS PROVIDED "AS IS," AND COPYRIGHT HOLDERS MAKE
019 * NO REPRESENTATIONS OR WARRANTIES, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED
020 * TO, WARRANTIES OF MERCHANTABILITY OR FITNESS FOR ANY PARTICULAR PURPOSE OR THAT
021 * THE USE OF THE SOFTWARE OR DOCUMENTATION WILL NOT INFRINGE ANY THIRD PARTY
022 * PATENTS, COPYRIGHTS, TRADEMARKS OR OTHER RIGHTS.
023 *
024 * COPYRIGHT HOLDERS WILL NOT BE LIABLE FOR ANY DIRECT, INDIRECT, SPECIAL OR
025 * CONSEQUENTIAL DAMAGES ARISING OUT OF ANY USE OF THE SOFTWARE OR DOCUMENTATION.
026 *
027 * The name and trademarks of copyright holders may NOT be used in advertising or
028 * publicity pertaining to the software without specific, written prior permission.
029 * Title to copyright in this software and any associated documentation will at all
030 * times remain with copyright holders.
031 */
032 package org.opengis.style;
033
034 import org.opengis.annotation.Extension;
035 import org.opengis.annotation.XmlElement;
036 import org.opengis.filter.expression.Function;
037
038
039 /**
040 * <p>The ColorMap element defines the mapping of palette-type raster colors or fixed-
041 * numeric pixel values to colors using an Interpolate or Categorize SE function
042 * </p>
043 * <p>
044 * For example, a DEM raster giving elevations in meters above sea level can be
045 * translated to a colored image with a ColorMap. The quantity attributes of
046 * a color-map are used for translating between numeric matrixes and color
047 * rasters and the ColorMap entries should be in order of increasing numeric
048 * quantity so that intermediate numeric values can be matched to a color (or
049 * be interpolated between two colors). Labels may be used for legends or
050 * may be used in the future to match character values. Not all systems can
051 * support opacity in colormaps. The default opacity is 1.0 (fully opaque).
052 * Defaults for quantity and label are system-dependent.
053 * </p>
054 * @version <A HREF="http://www.opengeospatial.org/standards/symbol">Symbology Encoding Implementation Specification 1.1.0</A>
055 * @author Open Geospatial Consortium
056 * @author Johann Sorel (Geomatys)
057 * @since GeoAPI 2.2
058 */
059 @XmlElement("ColorMap")
060 public interface ColorMap {
061
062 /**
063 *
064 * @return Interpolate or Categorize function
065 */
066 Function getFunction();
067
068 /**
069 * calls the visit method of a StyleVisitor
070 *
071 * @param visitor the style visitor
072 */
073 @Extension
074 Object accept(StyleVisitor visitor, Object extraData);
075
076 }