Class GridReaderLayer

    • Field Detail

      • reader

        protected GridCoverage2DReader reader
        Grid coverage reader allowing direct access to raster content.
    • 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