org.geotools.renderer.lite.gridcoverage2d

Class GridCoverageReaderHelper

Object

GridCoverageReaderHelper

public class GridCoverageReaderHelper
extends Object

Support class that performs the actions needed to read a GridCoverage for the task of rendering it at a given resolution, on a given area, taking into account projection oddities, dateline crossing, and the like

Author:

Andrea Aime - GeoSolutions

Constructor Summary

Constructors

Constructor and Description
GridCoverageReaderHelper(GridCoverage2DReader reader, Rectangle mapRasterArea, ReferencedEnvelope mapExtent, Interpolation interpolation)
GridCoverageReaderHelper(GridCoverage2DReader reader, Rectangle mapRasterArea, ReferencedEnvelope mapExtent, Interpolation interpolation, Hints hints)

Method Summary

Modifier and Type	Method and Description
ReferencedEnvelope	getReadEnvelope()
static boolean	isReprojectingReader(GridCoverage2DReader reader) Returns true if the reader is a reprojecting one, that is, one that can handle the coverage reprojection on its own
GridCoverage2D	readCoverage(GeneralParameterValue[] params) Reads a single coverage for the area specified in the constructor, the code will not attempt multiple reads to manage reads across the date line, reducing the read area, splitting it into parts to manage certain projections (e.g., conic) and so on
List<GridCoverage2D>	readCoverages(GeneralParameterValue[] readParams, ProjectionHandler handler) Reads the data taking into account advanced projection handling in order to deal with date line crossing, poles and other projection trouble areas.
List<GridCoverage2D>	readCoverages(GeneralParameterValue[] readParams, ProjectionHandler handler, GridCoverageFactory gridCoverageFactory) Reads the data taking into account advanced projection handling in order to deal with date line crossing, poles and other projection trouble areas.

Methods inherited from class Object

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

Constructor Detail

GridCoverageReaderHelper

public GridCoverageReaderHelper(GridCoverage2DReader reader,
                                Rectangle mapRasterArea,
                                ReferencedEnvelope mapExtent,
                                Interpolation interpolation)
                         throws FactoryException,
                                IOException

Throws:

FactoryException

IOException

GridCoverageReaderHelper

public GridCoverageReaderHelper(GridCoverage2DReader reader,
                                Rectangle mapRasterArea,
                                ReferencedEnvelope mapExtent,
                                Interpolation interpolation,
                                Hints hints)
                         throws FactoryException,
                                IOException

Throws:

FactoryException

IOException

Method Detail

isReprojectingReader

public static boolean isReprojectingReader(GridCoverage2DReader reader)
                                    throws IOException

Returns true if the reader is a reprojecting one, that is, one that can handle the coverage reprojection on its own

Throws:

IOException

getReadEnvelope

public ReferencedEnvelope getReadEnvelope()

readCoverage

public GridCoverage2D readCoverage(GeneralParameterValue[] params)
                            throws IOException

Reads a single coverage for the area specified in the constructor, the code will not attempt multiple reads to manage reads across the date line, reducing the read area, splitting it into parts to manage certain projections (e.g., conic) and so on

Throws:

IOException

readCoverages

public List<GridCoverage2D> readCoverages(GeneralParameterValue[] readParams,
                                          ProjectionHandler handler)
                                   throws IOException,
                                          FactoryException,
                                          TransformException

Reads the data taking into account advanced projection handling in order to deal with date line crossing, poles and other projection trouble areas. The result is a set of coverages that can be either painted or reprojected safely

Throws:

IOException

FactoryException

TransformException

readCoverages

public List<GridCoverage2D> readCoverages(GeneralParameterValue[] readParams,
                                          ProjectionHandler handler,
                                          GridCoverageFactory gridCoverageFactory)
                                   throws IOException,
                                          FactoryException,
                                          TransformException

Reads the data taking into account advanced projection handling in order to deal with date line crossing, poles and other projection trouble areas. The result is a set of coverages that can be either painted or reprojected safely

Throws:

IOException

FactoryException

TransformException