org.geotools.map

Class GridReaderLayer

Object

Layer

StyleLayer

RasterLayer

GridReaderLayer

Direct Known Subclasses:

WMSLayer, WMTSMapLayer

public class GridReaderLayer
extends RasterLayer

Layer used to draw a raster GridCoverage2DReader.

Direct access to the AbstractGridCoverage2DReader is available using getReader(), the outline of the raster is also available via toFeatureCollection() for vector based rendering systems.

Since:

2.7

Author:

Jody Garnett

Field Summary

Fields

Modifier and Type	Field and Description
protected GeneralParameterValue[]	params Optional parameters to control the rendering process.
protected GridCoverage2DReader	reader Grid coverage reader allowing direct access to raster content.

Fields inherited from class RasterLayer

source

Fields inherited from class StyleLayer

style

Fields inherited from class Layer

listenerList, LOGGER, selected, title, userData, visible

Constructor Summary

Constructors

Constructor and Description
GridReaderLayer(GridCoverage2DReader reader, Style style) Create a lyaer to draw the provided grid coverage reader.
GridReaderLayer(GridCoverage2DReader reader, Style style, GeneralParameterValue[] params) Create a layer with optional parameters to control the rendering process.
GridReaderLayer(GridCoverage2DReader reader, Style style, String title) Create a layer to draw the provided grid coverage reader.
GridReaderLayer(GridCoverage2DReader reader, Style style, String title, GeneralParameterValue[] params) Create layer title and optional parameters used to control the rendering process.

Method Summary

Modifier and Type	Method and Description
void	dispose() Allows a Layer to clean up any listeners, or internal caches or resources it has added during use.
ReferencedEnvelope	getBounds() The bounds of the Layer content (if known).
GeneralParameterValue[]	getParams() Parameter values used when reading.
GridCoverage2DReader	getReader() Reader used for efficient access to raster content.
SimpleFeatureCollection	toFeatureCollection() Supply a FeatureCollection indicating where the raster is located, we ask that the features use the same coordinate reference system as your raster data and form an outline or foot print of the information you have available.

Methods inherited from class RasterLayer

getFeatureSource

Methods inherited from class StyleLayer

getStyle, setStyle

Methods inherited from class Layer

addMapLayerListener, connectDataListener, finalize, fireMapLayerListenerLayerChanged, fireMapLayerListenerLayerDeselected, fireMapLayerListenerLayerHidden, fireMapLayerListenerLayerPreDispose, fireMapLayerListenerLayerSelected, fireMapLayerListenerLayerShown, getQuery, getTitle, getUserData, isSelected, isVisible, preDispose, removeMapLayerListener, setSelected, setTitle, setVisible, toString

Methods inherited from class Object

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

Field Detail

reader

protected GridCoverage2DReader reader

Grid coverage reader allowing direct access to raster content.

params

protected GeneralParameterValue[] params

Optional parameters to control the rendering process.

Constructor Detail

GridReaderLayer

public GridReaderLayer(GridCoverage2DReader reader,
                       Style style)

Create a lyaer to draw the provided grid coverage reader.

Parameters:

reader - a reader with the new layer that will be added

GridReaderLayer

public GridReaderLayer(GridCoverage2DReader reader,
                       Style style,
                       String title)

Create a layer to draw the provided grid coverage reader.

Parameters:

reader - a reader with the new layer that will be added.

GridReaderLayer

public GridReaderLayer(GridCoverage2DReader reader,
                       Style style,
                       GeneralParameterValue[] params)

Create a layer with optional parameters to control the rendering process.

Parameters:

reader - a reader with the new layer that will be added.

GridReaderLayer

public GridReaderLayer(GridCoverage2DReader reader,
                       Style style,
                       String title,
                       GeneralParameterValue[] params)

Create layer title and optional parameters used to control the rendering process.

Parameters:

reader - a reader with the new layer that will be added.

params - GeneralParameterValue[] that describe how the AbstractGridCoverage2DReader shall read the images

Method Detail

dispose

public void dispose()

Description copied from class: Layer

Allows a Layer to clean up any listeners, or internal caches or resources it has added during use.

Overrides:

dispose in class RasterLayer

getBounds

public ReferencedEnvelope getBounds()

Description copied from class: Layer

The bounds of the Layer content (if known). The bounds can be used to determine if any of the layers content is "on screen" when rendering the map; however often it is expensive to calculate a layers bounds up front so we are allowing this value to be optional.

The returned bounds are a ReferencedEnvelope using the same CoordinateReferenceSystem as the layers contents.

Specified by:

getBounds in class Layer

Returns:

layer bounds, null if unknown

getReader

public GridCoverage2DReader getReader()

Reader used for efficient access to raster content.

getParams

public GeneralParameterValue[] getParams()

Parameter values used when reading.

Returns:

parameters used when reader

toFeatureCollection

public SimpleFeatureCollection toFeatureCollection()

Description copied from class: RasterLayer

Supply a FeatureCollection indicating where the raster is located, we ask that the features use the same coordinate reference system as your raster data and form an outline or foot print of the information you have available.

This is an interesting method for a RasterLayer to have; some of the rendering systems are willing to render your raster content as an outline; for this to work they need this method to supply a feature collection indicating where the content is located. The information may also be used to determine if any of your raster content is on screen (and thus needs to be rendered).

Note this is a feature collection to allow for raster content that contains more than one image; and is not based bounding boxes (as sometimes rasters are rotated or stretched into position).

You may find the FeatureUtilities useful in wrapping up your raster content.

Specified by:

toFeatureCollection in class RasterLayer

Returns:

SimpleFeatureCollection indicating the location of raster content