org.geotools.process.raster

Class CoverageUtilities

Object

CoverageUtilities

public class CoverageUtilities
extends Object

A set of utilities methods for the Grid Coverage package. Those methods are not really rigorous; must of them should be seen as temporary implementations.

Author:

Simone Giannecchini, GeoSolutions

Field Summary

Fields

Modifier and Type	Field and Description
static String	COLS
static String	EAST
static String	MINX
static String	MINY
static String	NORTH
static String	ROWS
static String	SOUTH
static String	WEST
static String	XRES
static String	YRES

Method Summary

Modifier and Type	Method and Description
static Number	convert(Number val, Class<? extends Number> type)
static SimpleFeatureType	createFeatureType(GridCoverage2D gc2d, Class<? extends Geometry> geometryClass) Creates a SimpleFeatureType that exposes a coverage as a collections of feature points, mapping the centre of each pixel as a point plus all the bands as attributes.
static RangeLookupTable	getRangeLookupTable(List<Range> classificationRanges, int[] outputPixelValues, Number noDataValue)
static RangeLookupTable	getRangeLookupTable(List<Range> classificationRanges, int[] outputPixelValues, Number noDataValue, Class<? extends Number> clazz)
static RangeLookupTable	getRangeLookupTable(List<Range> classificationRanges, Number noDataValue)
static RangeLookupTable	getRangeLookupTable(List<Range> classificationRanges, Number noDataValue, Class clazz)
static RangeLookupTable	getRangeLookupTableJAIEXT(List<Range> classificationRanges, int[] outputPixelValues, Number noDataValue, int transferType)
static HashMap<String,Double>	getRegionParamsFromGridCoverage(GridCoverage2D gridCoverage) Get the parameters of the region covered by the coverage.
static ROI	prepareROI(Geometry roi, AffineTransform mt2d) Utility method for transforming a geometry ROI into the raster space, using the provided affine transformation.

Methods inherited from class Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Field Detail

NORTH

public static final String NORTH

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Constant Field Values

SOUTH

public static final String SOUTH

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Constant Field Values

WEST

public static final String WEST

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Constant Field Values

EAST

public static final String EAST

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Constant Field Values

XRES

public static final String XRES

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Constant Field Values

YRES

public static final String YRES

See Also:

Constant Field Values

ROWS

public static final String ROWS

See Also:

Constant Field Values

COLS

public static final String COLS

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Constant Field Values

MINY

public static final String MINY

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Constant Field Values

MINX

public static final String MINX

See Also:

Constant Field Values

Method Detail

prepareROI

public static ROI prepareROI(Geometry roi,
                             AffineTransform mt2d)
                      throws ProcessException

Utility method for transforming a geometry ROI into the raster space, using the provided affine transformation.

Parameters:

roi - a Geometry in model space.

mt2d - an AffineTransform that maps from raster to model space. This is already referred to the pixel corner.

Returns:

a ROI suitable for using with JAI.

Throws:

ProcessException - in case there are problems with ivnerting the provided AffineTransform. Very unlikely to happen.

createFeatureType

public static SimpleFeatureType createFeatureType(GridCoverage2D gc2d,
                                                  Class<? extends Geometry> geometryClass)

Creates a SimpleFeatureType that exposes a coverage as a collections of feature points, mapping the centre of each pixel as a point plus all the bands as attributes.

The FID is the long that combines x+y*width.

Parameters:

gc2d - the GridCoverage2D to wrap.

geometryClass - the class for the geometry.

Returns:

a SimpleFeatureType or null in case we are unable to wrap the coverage

getRangeLookupTable

public static RangeLookupTable getRangeLookupTable(List<Range> classificationRanges,
                                                   Number noDataValue)

getRangeLookupTable

public static RangeLookupTable getRangeLookupTable(List<Range> classificationRanges,
                                                   Number noDataValue,
                                                   Class clazz)

getRangeLookupTable

public static RangeLookupTable getRangeLookupTable(List<Range> classificationRanges,
                                                   int[] outputPixelValues,
                                                   Number noDataValue)

getRangeLookupTable

public static RangeLookupTable getRangeLookupTable(List<Range> classificationRanges,
                                                   int[] outputPixelValues,
                                                   Number noDataValue,
                                                   Class<? extends Number> clazz)

getRangeLookupTableJAIEXT

public static RangeLookupTable getRangeLookupTableJAIEXT(List<Range> classificationRanges,
                                                         int[] outputPixelValues,
                                                         Number noDataValue,
                                                         int transferType)

convert

public static Number convert(Number val,
                             Class<? extends Number> type)

getRegionParamsFromGridCoverage

public static HashMap<String,Double> getRegionParamsFromGridCoverage(GridCoverage2D gridCoverage)

Get the parameters of the region covered by the coverage.

Parameters:

gridCoverage - the coverage.

Returns:

the map of parameters. ( NORTH and the other static vars can be used to retrieve them.