Package org.geotools.data

Class WorldFileReader

Object
WorldFileReader
public class WorldFileReader extends Object
This class is responsible for parsing a world file in order to build an affine transform using the parameters provided in the file itself.

The parameters found in the file should be as follows:

  1. size of pixel in x direction
  2. rotation term for row
  3. rotation term for column
  4. size of pixel in y direction
  5. x coordinate of centre of upper left pixel in map units
  6. y coordinate of centre of upper left pixel in map units
Note that the last two coordinates refer to the centre of the pixel!

It is worth to point out that various data sources describe the parameters in the world file as the mapping from the pixel centres' to the associated world coords. Here we directly build the needed grid to world transform and we DO NOT add any half a pixel translation given that, as stated above, the values we receive should map to the centre of the pixel.

Since:
2.3
Author:
Simone Giannecchini, GeoSolutions

  • Field Details

    • DEFAULT_BUFFER_SIZE

      public static final int DEFAULT_BUFFER_SIZE
      Default size for the underlying buffer,
      See Also:

  • Constructor Details

    • WorldFileReader

      public WorldFileReader(File inFile) throws IOException
      Default constructor for a WorldFileReader.
      Parameters:
      inFile - holds the location where to read from.
      Throws:
      IOException - in case something bad happens.

    • WorldFileReader

      public WorldFileReader(File worldfile, int bufferSize) throws IOException
      Constructor for a WorldFileReader.
      Parameters:
      worldfile - holds the location where to read from.
      bufferSize - to buffer when reading.
      Throws:
      IOException - in case something bad happens.

    • WorldFileReader

      public WorldFileReader(URL worldfile, int bufferSize) throws IOException
      Constructor for a WorldFileReader.
      Parameters:
      worldfile - URL where to read from.
      bufferSize - to buffer when reading.
      Throws:
      IOException - in case something bad happens.

    • WorldFileReader

      public WorldFileReader(URL worldfile) throws IOException
      Constructor for a WorldFileReader.
      Parameters:
      worldfile - URL where to read from.
      Throws:
      IOException - in case something bad happens.

  • Method Details

    • getRotationX

      public double getRotationX()

    • getRotationY

      public double getRotationY()

    • getXPixelSize

      public double getXPixelSize()

    • getXULC

      public double getXULC()

    • getYPixelSize

      public double getYPixelSize()

    • getYULC

      public double getYULC()

    • getTransform

      public MathTransform getTransform()

    • getAffineTransform

      public AffineTransform getAffineTransform()
      Creates an AffineTransform for interoperability with Java2d.
      Returns:
      an AffineTransform representing the transformation represented by the underlying world file.