Package org.geotools.gce.grassraster

Class JGrassUtilities

Object
JGrassUtilities
public class JGrassUtilities extends Object
A facade of often used methods by the JGrass engine
Since:
1.1.0
Author:
Andrea Antonello - www.hydrologis.com

  • Field Details

  • Constructor Details

    • JGrassUtilities

      public JGrassUtilities()

  • Method Details

    • checkRasterMapConsistence

      public static boolean checkRasterMapConsistence(String mapsetPath, String mapname)
      Returns the list of files involved in the raster map issues. If for example a map has to be deleted, then all these files have to.
      Parameters:
      mapsetPath - - the path of the mapset
      mapname - -the name of the map
      Returns:
      the array of strings containing the full path to the involved files

    • ByteBufferImage

      public static BufferedImage ByteBufferImage(byte[] data, int width, int height)
      create a buffered image from a set of color triplets

    • reprojectEnvelopeByEpsg

      public static Envelope reprojectEnvelopeByEpsg(int srcEpsg, int destEpsg, Envelope srcEnvelope) throws FactoryException, TransformException
      Throws:
      FactoryException
      TransformException

    • getRectangleAroundPoint

      public static JGrassRegion getRectangleAroundPoint(JGrassRegion activeRegion, double x, double y)
      return the rectangle of the cell of the active region, that surrounds the given coordinates
      Parameters:
      x - the given easting coordinate
      y - given northing coordinate
      Returns:
      the rectangle localizing the cell inside which the x and y stay

    • rowColToCenterCoordinates

      public static Coordinate rowColToCenterCoordinates(JGrassRegion active, int row, int col)
      Transforms row and column index of the active region into the regarding northing and easting coordinates. The center of the cell is taken.

      NOTE: basically the inverse of coordinateToNearestRowCol(JGrassRegion, Coordinate)

      Parameters:
      active - - the active region (can be null)
      row - - row number of the point to transform
      col - - column number of the point to transform
      Returns:
      the point in N/E coordinates of the supplied row and column

    • coordinateToNearestRowCol

      public static int[] coordinateToNearestRowCol(JGrassRegion active, Coordinate coord)
      Return the row and column of the active region matrix for a give coordinate *

      NOTE: basically the inverse of rowColToCenterCoordinates(JGrassRegion, int, int)

      Parameters:
      active - the active region
      Returns:
      and int array containing row and col

    • filesOfRasterMap

      public static String[] filesOfRasterMap(String mapsetPath, String mapname)
      Returns the list of files involved in the raster map issues. If for example a map has to be deleted, then all these files have to.
      Parameters:
      mapsetPath - - the path of the mapset
      mapname - -the name of the map
      Returns:
      the array of strings containing the full path to the involved files

    • rowColToNodeboundCoordinates

      public static double[] rowColToNodeboundCoordinates(JGrassRegion active, int row, int col)
      Transforms row and column index of the active region into an array of the coordinates of the edgaes, i.e. n, s, e, w
      Parameters:
      active - - the active region (can be null)
      row - - row number of the point to transform
      col - - column number of the point to transform
      Returns:
      the array of north, south, east, west

    • factorial

      public static int factorial(int n)

    • makeColorRulesPersistent

      public static void makeColorRulesPersistent(File colrFile, List<String> rules, double[] minMax, int alpha) throws IOException
      Throws:
      IOException

    • getTilesBasedOnFreeMemory

      public static int[] getTilesBasedOnFreeMemory(int rows, int cols)
      Calculates optimal tile size for the actual free memory.
      Parameters:
      rows - the rows of the complete image the tiles are calculated for.
      cols - the cols of the complete image the tiles are calculated for.

    • getJGrassRegionFromGridCoverage

      public static JGrassRegion getJGrassRegionFromGridCoverage(GridCoverage2D gridCoverage2D) throws InvalidGridGeometryException, TransformException
      Throws:
      InvalidGridGeometryException
      TransformException

    • scaleJAIImage

      public static RenderedImage scaleJAIImage(int requestedCols, int requestedRows, RenderedImage translatedImage, Interpolation interpolation)

    • buildCoverage

      public static GridCoverage2D buildCoverage(String name, double[][] dataMatrix, double n, double s, double w, double e, CoordinateReferenceSystem crs, boolean matrixIsRowCol)
      Creates a coverage from a double[][] matrix and the necessary geographic Information.
      Parameters:
      name - the name of the coverage.
      dataMatrix - the matrix containing the data.
      crs - the CoordinateReferenceSystem.
      matrixIsRowCol - a flag to tell if the matrix has rowCol or colRow order.
      Returns:
      the coverage.

    • createWritableRasterFromMatrix

      public static WritableRaster createWritableRasterFromMatrix(double[][] matrix, boolean matrixIsRowCol)
      Create a WritableRaster from a double matrix.
      Parameters:
      matrix - the matrix to take the data from.
      matrixIsRowCol - a flag to tell if the matrix has rowCol or colRow order.
      Returns:
      the produced raster.

    • createDoubleWritableRaster

      public static WritableRaster createDoubleWritableRaster(int width, int height, Class<?> dataClass, SampleModel sampleModel, Double value)
      Creates a writable raster.
      Parameters:
      width - width of the raster to create.
      height - height of the raster to create.
      dataClass - data type for the raster. If null, defaults to double.
      sampleModel - the samplemodel to use. If null, defaults to new ComponentSampleModel(dataType, width, height, 1, width, new int[]{0});.
      value - value to which to set the raster to. If null, the default of the raster creation is used, which is 0.
      Returns:
      a writable raster.

    • isGrass

      public static boolean isGrass(String path)
      Checks if the given path is a GRASS raster file.

      Note that there is no check on the existence of the file.

      Parameters:
      path - the path to check.
      Returns:
      true if the file is a grass raster.

    • printImage

      public static void printImage(GridCoverage2D coverage2D)

    • printImage

      public static void printImage(RenderedImage renderedImage)