Package org.openstreetmap.josm.data.projection.proj

Class EquidistantCylindrical

  • All Implemented Interfaces:
    Proj
    public class EquidistantCylindrical
extends AbstractProj
    Equidistant cylindrical projection (EPSG code 9823). In the particular case where the standard_parallel_1 is 0°, this projection is also called Plate Carree or Equirectangular. This is used in, for example, WGS84 / Plate Carree (EPSG:32662).

    References:

    • John P. Snyder (Map Projections - A Working Manual,
      U.S. Geological Survey Professional Paper 1395, 1987)
    • "Coordinate Conversions and Transformations including Formulas",
      EPSG Guidence Note Number 7 part 2, Version 24.
    Since:
    13598
    See Also:
    Cylindrical Equidistant projection on MathWorld, "Equirectangular" on RemoteSensing.org

    • Field Detail

      • cosStandardParallel

        private double cosStandardParallel
        Cosinus of the "standard_parallel_1" parameter.

    • Method Detail

      • getName

        public java.lang.String getName()
        Description copied from interface: Proj
        Replies a human readable name of this projection.
        Returns:
        The projection name. must not be null.

      • getProj4Id

        public java.lang.String getProj4Id()
        Description copied from interface: Proj
        Replies the Proj.4 identifier.
        Returns:
        The Proj.4 identifier (as reported by cs2cs -lp). If no id exists, return null.

      • project

        public double[] project​(double latRad,
                        double lonRad)
        Description copied from interface: Proj
        Convert lat/lon to east/north.
        Parameters:
        latRad - the latitude in radians
        lonRad - the longitude in radians
        Returns:
        array of length 2, containing east and north value in meters, divided by the semi major axis of the ellipsoid.

      • invproject

        public double[] invproject​(double east,
                           double north)
        Description copied from interface: Proj
        Convert east/north to lat/lon.
        Parameters:
        east - east value in meters, divided by the semi major axis of the ellipsoid
        north - north value in meters, divided by the semi major axis of the ellipsoid
        Returns:
        array of length 2, containing lat and lon in radians.

      • getAlgorithmBounds

        public Bounds getAlgorithmBounds()
        Description copied from interface: Proj
        Return the bounds where this projection is applicable. This is a fallback for when the projection bounds are not specified explicitly. In this area, the round trip lat/lon → east/north → lat/lon should return the starting value with small error. In addition, regions with extreme distortions should be excluded, if possible. It need not be the absolute maximum, but rather an area that is safe to display in JOSM and contain everything that one would expect to use.
        Returns:
        the bounds where this projection is applicable, null if unknown