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/*
* GeoTools - The Open Source Java GIS Toolkit
* http://geotools.org
*
* (C) 2011, Open Source Geospatial Foundation (OSGeo)
* (C) 2005 Open Geospatial Consortium Inc.
*
* All Rights Reserved. http://www.opengis.org/legal/
*/
package org.opengis.coverage;
import static org.opengis.annotation.Obligation.MANDATORY;
import static org.opengis.annotation.Specification.ISO_19123;
import static org.opengis.annotation.Specification.OGC_01004;
import java.awt.image.Raster;
import java.awt.image.renderable.RenderableImage;
import java.util.Collection;
import java.util.List;
import java.util.Set;
import org.opengis.annotation.Extension;
import org.opengis.annotation.Specification;
import org.opengis.annotation.UML;
import org.opengis.geometry.DirectPosition;
import org.opengis.geometry.Envelope;
import org.opengis.referencing.crs.CoordinateReferenceSystem;
import org.opengis.util.Record;
import org.opengis.util.RecordType;
/**
* A function from a spatial, temporal or spatiotemporal domain to an attribute range. A coverage
* associates a {@linkplain DirectPosition position} within its domain to a record of values of
* defined data types. Examples include a raster image, polygon overlay, or digital elevation
* matrix. The essential property of coverage is to be able to generate a value for any point within
* its domain. How coverage is represented internally is not a concern.
*
* For example consider the following different internal representations of coverage:
*
*
* - A coverage may be represented by a set of polygons which exhaustively tile a plane (that is
* each point on the plane falls in precisely one polygon). The value returned by the coverage
* for a point is the value of an attribute of the polygon that contains the point.
*
- A coverage may be represented by a grid of values (a {@linkplain DiscreteGridPointCoverage
* Discrete Grid Point Coverage}). If the coverage is a {@linkplain
* ContinuousQuadrilateralGridCoverage Continuous Quadrilateral Grid Coverage} using
* {@linkplain InterpolationMethod#NEAREST_NEIGHBOUR Nearest Neighbour} interpolation method,
* then the value returned by the coverage for a point is that of the grid value whose
* location is nearest the point.
*
- Coverage may be represented by a mathematical function. The value returned by the coverage
* for a point is just the return value of the function when supplied the coordinates of the
* point as arguments.
*
- Coverage may be represented by combination of these. For example, coverage may be
* represented by a combination of mathematical functions valid over a set of polynomials.
*
*
* Metadata
*
* The legacy {@linkplain Specification#OGC_01004 OGC 01-004} specification provided some methods
* for fetching metadata values attached to a coverage. The {@linkplain Specification#ISO_19123 ISO
* 19123} specification do not provides such methods. Implementations that want to provide such
* metadata are encouraged to implement the {@link javax.media.jai.PropertySource} or {@link
* javax.media.jai.WritablePropertySource} interface.
*
* @version ISO 19123:2004
* @author Stephane Fellah
* @author Martin Desruisseaux (IRD)
* @author Wim Koolhoven
* @author Alexander Petkov
* @since GeoAPI 2.1
*/
@UML(identifier = "CV_Coverage", specification = ISO_19123)
public interface Coverage {
/**
* Returns the coordinate reference system to which the objects in its domain are referenced.
* This is the CRS used when accessing a coverage or grid coverage with the {@code
* evaluate(...)} methods. This coordinate reference system is usually different than coordinate
* system of the grid. It is the target coordinate reference system of the {@link
* org.opengis.coverage.grid.GridGeometry#getGridToCRS gridToCRS} math transform.
*
* Grid coverage can be accessed (re-projected) with new coordinate reference system with the
* {@link org.opengis.coverage.processing.GridCoverageProcessor} component. In this case, a new
* instance of a grid coverage is created.
*
* @return The coordinate reference system used when accessing a coverage or grid coverage with
* the {@code evaluate(...)} methods.
*/
@UML(identifier = "CRS", obligation = MANDATORY, specification = ISO_19123)
CoordinateReferenceSystem getCoordinateReferenceSystem();
/**
* The bounding box for the coverage domain in {@linkplain #getCoordinateReferenceSystem
* coordinate reference system} coordinates. For grid coverages, the grid cells are centered on
* each grid coordinate. The envelope for a 2-D grid coverage includes the following corner
* positions.
*
*
*
*
* (Minimum row - 0.5, Minimum column - 0.5) for the minimum coordinates
* (Maximum row - 0.5, Maximum column - 0.5) for the maximum coordinates
*
*
*
*
* If a grid coverage does not have any associated coordinate reference system, the minimum and
* maximum coordinate points for the envelope will be empty sequences.
*
* @return The bounding box for the coverage domain in coordinate system coordinates.
* @todo We need to explain the relationship with {@link #getDomainExtents}, if any.
*/
@UML(identifier = "envelope", obligation = MANDATORY, specification = OGC_01004)
Envelope getEnvelope();
/**
* Describes the range of the coverage. It consists of a list of attribute name/data type pairs.
* A simple list is the most common form of range type, but {@code RecordType} can be used
* recursively to describe more complex structures. The range type for a specific coverage shall
* be specified in an application schema.
*
* @return The coverage range.
*/
@UML(identifier = "rangeType", obligation = MANDATORY, specification = ISO_19123)
RecordType getRangeType();
/**
* Returns a set of records of feature attribute values for the specified direct position. The
* parameter {@code list} is a sequence of feature attribute names each of which identifies a
* field of the range type. If {@code list} is null, the operation shall return a value for
* every field of the range type. Otherwise, it shall return a value for each field included in
* {@code list}. If the direct position passed is not in the domain of the coverage, then an
* exception is thrown. If the input direct position falls within two or more geometric objects
* within the domain, the operation shall return records of feature attribute values computed
* according to the {@linkplain #getCommonPointRule common point rule}.
*
* NOTE: Normally, the operation will return a single record of feature attribute
* values.
*
* @param p The position where to evaluate.
* @param list The field of interest, or {@code null} for every fields.
* @return The feature attributes.
* @throws PointOutsideCoverageException if the point is outside the coverage domain.
* @throws CannotEvaluateException If the point can't be evaluated for some other reason.
*/
@UML(identifier = "evaluate", obligation = MANDATORY, specification = ISO_19123)
Set evaluate(DirectPosition p, Collection list)
throws PointOutsideCoverageException, CannotEvaluateException;
/**
* Return the value vector for a given point in the coverage. A value for each sample dimension
* is included in the vector. The default interpolation type used when accessing grid values for
* points which fall between grid cells is nearest neighbor.
*
* The coordinate reference system of the point is the same as the grid coverage coordinate
* reference system (specified by the {@link #getCoordinateReferenceSystem} method).
*
*
WARNING: This method is inherited from the legacy OGC 01-004
* specification and may be deprecated in a future version. We are for more experience and
* feedbacks on the value of this method.
*
* @param point Point at which to find the grid values.
* @return The value vector for a given point in the coverage.
* @throws PointOutsideCoverageException if the point is outside the coverage {@linkplain
* #getEnvelope envelope}.
* @throws CannotEvaluateException If the point can't be evaluated for some other reason.
* @see Raster#getDataElements(int, int, Object)
*/
@UML(identifier = "evaluate", obligation = MANDATORY, specification = OGC_01004)
Object evaluate(DirectPosition point)
throws PointOutsideCoverageException, CannotEvaluateException;
/**
* Return a sequence of boolean values for a given point in the coverage. A value for each
* sample dimension is included in the sequence. The default interpolation type used when
* accessing grid values for points which fall between grid cells is nearest neighbor.
*
*
The coordinate reference system of the point is the same as the grid coverage coordinate
* reference system (specified by the {@link #getCoordinateReferenceSystem} method).
*
* @param point Point at which to find the coverage values.
* @param destination An optionally preallocated array in which to store the values, or {@code
* null} if none.
* @return A sequence of boolean values for a given point in the coverage. If {@code
* destination} was non-null, then it is returned. Otherwise, a new array is allocated and
* returned.
* @throws PointOutsideCoverageException if the point is outside the coverage {@linkplain
* #getEnvelope envelope}.
* @throws CannotEvaluateException if the point can't be evaluated for some othe reason.
* @throws ArrayIndexOutOfBoundsException if the {@code destination} array is not null and too
* small to hold the output.
*/
@UML(identifier = "evaluateAsBoolean", obligation = MANDATORY, specification = OGC_01004)
boolean[] evaluate(DirectPosition point, boolean[] destination)
throws PointOutsideCoverageException, CannotEvaluateException,
ArrayIndexOutOfBoundsException;
/**
* Return a sequence of unsigned byte values for a given point in the coverage. A value for each
* sample dimension is included in the sequence. The default interpolation type used when
* accessing grid values for points which fall between grid cells is nearest neighbor.
*
*
The coordinate reference system of the point is the same as the grid coverage coordinate
* reference system (specified by the {@link #getCoordinateReferenceSystem} method).
*
* @param point Point at which to find the coverage values.
* @param destination An optionally preallocated array in which to store the values, or {@code
* null} if none.
* @return A sequence of unsigned byte values for a given point in the coverage. If {@code
* destination} was non-null, then it is returned. Otherwise, a new array is allocated and
* returned.
* @throws PointOutsideCoverageException if the point is outside the coverage {@linkplain
* #getEnvelope envelope}.
* @throws CannotEvaluateException if the point can't be evaluated for some othe reason.
* @throws ArrayIndexOutOfBoundsException if the {@code destination} array is not null and too
* small to hold the output.
*/
@UML(identifier = "evaluateAsByte", obligation = MANDATORY, specification = OGC_01004)
byte[] evaluate(DirectPosition point, byte[] destination)
throws PointOutsideCoverageException, CannotEvaluateException,
ArrayIndexOutOfBoundsException;
/**
* Return a sequence of integer values for a given point in the coverage. A value for each
* sample dimension is included in the sequence. The default interpolation type used when
* accessing grid values for points which fall between grid cells is nearest neighbor.
*
*
The coordinate reference system of the point is the same as the grid coverage coordinate
* reference system (specified by the {@link #getCoordinateReferenceSystem} method).
*
* @param point Point at which to find the grid values.
* @param destination An optionally preallocated array in which to store the values, or {@code
* null} if none.
* @return A sequence of integer values for a given point in the coverage. If {@code
* destination} was non-null, then it is returned. Otherwise, a new array is allocated and
* returned.
* @throws PointOutsideCoverageException if the point is outside the coverage {@linkplain
* #getEnvelope envelope}.
* @throws CannotEvaluateException if the point can't be evaluated for some othe reason.
* @throws ArrayIndexOutOfBoundsException if the {@code destination} array is not null and too
* small to hold the output.
* @see Raster#getPixel(int, int, int[])
*/
@UML(identifier = "evaluateAsInteger", obligation = MANDATORY, specification = OGC_01004)
int[] evaluate(DirectPosition point, int[] destination)
throws PointOutsideCoverageException, CannotEvaluateException,
ArrayIndexOutOfBoundsException;
/**
* Return a sequence of float values for a given point in the coverage. A value for each sample
* dimension is included in the sequence. The default interpolation type used when accessing
* grid values for points which fall between grid cells is nearest neighbor.
*
*
The coordinate reference system of the point is the same as the grid coverage coordinate
* reference system (specified by the {@link #getCoordinateReferenceSystem} method).
*
* @param point Point at which to find the grid values.
* @param destination An optionally preallocated array in which to store the values, or {@code
* null} if none.
* @return A sequence of float values for a given point in the coverage. If {@code destination}
* was non-null, then it is returned. Otherwise, a new array is allocated and returned.
* @throws PointOutsideCoverageException if the point is outside the coverage {@linkplain
* #getEnvelope envelope}.
* @throws CannotEvaluateException if the point can't be evaluated for some othe reason.
* @throws ArrayIndexOutOfBoundsException if the {@code destination} array is not null and too
* small to hold the output.
* @see Raster#getPixel(int, int, float[])
*/
float[] evaluate(DirectPosition point, float[] destination)
throws PointOutsideCoverageException, CannotEvaluateException,
ArrayIndexOutOfBoundsException;
/**
* Return a sequence of double values for a given point in the coverage. A value for each sample
* dimension is included in the sequence. The default interpolation type used when accessing
* grid values for points which fall between grid cells is nearest neighbor.
*
*
The coordinate reference system of the point is the same as the grid coverage coordinate
* reference system (specified by the {@link #getCoordinateReferenceSystem} method).
*
* @param point Point at which to find the grid values.
* @param destination An optionally preallocated array in which to store the values, or {@code
* null} if none.
* @return A sequence of double values for a given point in the coverage. If {@code destination}
* was non-null, then it is returned. Otherwise, a new array is allocated and returned.
* @throws PointOutsideCoverageException if the point is outside the coverage {@linkplain
* #getEnvelope envelope}.
* @throws CannotEvaluateException If the point can't be evaluated for some othe reason.
* @throws ArrayIndexOutOfBoundsException if the {@code destination} array is not null and too
* small to hold the output.
* @see Raster#getPixel(int, int, double[])
*/
@UML(identifier = "evaluateAsDouble", obligation = MANDATORY, specification = OGC_01004)
double[] evaluate(DirectPosition point, double[] destination)
throws PointOutsideCoverageException, CannotEvaluateException,
ArrayIndexOutOfBoundsException;
/**
* The number of sample dimensions in the coverage. For grid coverages, a sample dimension is a
* band.
*
*
WARNING: This method is inherited from the legacy OGC 01-004
* specification and may be deprecated in a future version. We are for more experience and
* feedbacks on the value of this method.
*
* @return The number of sample dimensions in the coverage.
*/
@UML(identifier = "numSampleDimensions", obligation = MANDATORY, specification = OGC_01004)
int getNumSampleDimensions();
/**
* Retrieve sample dimension information for the coverage. For a grid coverage a sample
* dimension is a band. The sample dimension information include such things as description,
* data type of the value (bit, byte, integer...), the no data values, minimum and maximum
* values and a color table if one is associated with the dimension. A coverage must have at
* least one sample dimension.
*
*
WARNING: This method is inherited from the legacy OGC 01-004
* specification and may be deprecated in a future version. We are for more experience and
* feedbacks on the value of this method.
*
* @param index Index for sample dimension to retrieve. Indices are numbered 0 to
* ({@linkplain #getNumSampleDimensions n}-1).
* @return Sample dimension information for the coverage.
* @throws IndexOutOfBoundsException if {@code index} is out of bounds.
*/
@UML(identifier = "getSampleDimension", obligation = MANDATORY, specification = OGC_01004)
SampleDimension getSampleDimension(int index) throws IndexOutOfBoundsException;
/**
* Returns the sources data for a coverage. This is intended to allow applications to establish
* what {@code Coverage}s will be affected when others are updated, as well as to trace back to
* the "raw data".
*
*
This implementation specification does not include interfaces for creating collections of
* coverages therefore the list size will usually be one indicating an adapted grid coverage, or
* zero indicating a raw grid coverage.
*
*
WARNING: This method is inherited from the legacy OGC 01-004
* specification and may be deprecated in a future version. We are for more experience and
* feedbacks on the value of this method.
*
* @return The list of sources data for a coverage.
*/
@UML(identifier = "getSource, numSource", obligation = MANDATORY, specification = OGC_01004)
List getSources();
/**
* Returns 2D view of this coverage as a renderable image. This optional operation allows
* interoperability with Java2D. If
* this coverage is a {@link org.opengis.coverage.grid.GridCoverage} backed by a {@link
* java.awt.image.RenderedImage}, the underlying image can be obtained with:
* getRenderableImage(0,1).{@linkplain RenderableImage#createDefaultRendering()
* createDefaultRendering()}
*
* @param xAxis Dimension to use for the x axis.
* @param yAxis Dimension to use for the y axis.
* @return A 2D view of this coverage as a renderable image.
* @throws UnsupportedOperationException if this optional operation is not supported.
* @throws IndexOutOfBoundsException if {@code xAxis} or {@code yAxis} is out of bounds.
*/
@Extension
RenderableImage getRenderableImage(int xAxis, int yAxis)
throws UnsupportedOperationException, IndexOutOfBoundsException;
}