Package org.openstreetmap.josm.data.coor

Class LatLon

  • All Implemented Interfaces:
    java.io.Serializable, ILatLon
    Direct Known Subclasses:
    CachedLatLon
    public class LatLon
extends Coordinate
implements ILatLon
    LatLon are unprojected latitude / longitude coordinates.
    Latitude specifies the north-south position in degrees where valid values are in the [-90,90] and positive values specify positions north of the equator.
    Longitude specifies the east-west position in degrees where valid values are in the [-180,180] and positive values specify positions east of the prime meridian.
    lat/lon
    This class is immutable.
    See Also:
    Serialized Form

    • Constructor Detail

      • LatLon

        public LatLon​(double lat,
              double lon)
        Constructs a new object representing the given latitude/longitude.
        Parameters:
        lat - the latitude, i.e., the north-south position in degrees
        lon - the longitude, i.e., the east-west position in degrees

      • LatLon

        public LatLon​(ILatLon coor)
        Creates a new LatLon object for the given coordinate
        Parameters:
        coor - The coordinates to copy from.

    • Method Detail

      • isValidLat

        public static boolean isValidLat​(double lat)
        Replies true if lat is in the range [-90,90]
        Parameters:
        lat - the latitude
        Returns:
        true if lat is in the range [-90,90]

      • isValidLon

        public static boolean isValidLon​(double lon)
        Replies true if lon is in the range [-180,180]
        Parameters:
        lon - the longitude
        Returns:
        true if lon is in the range [-180,180]

      • normalizeLon

        public static double normalizeLon​(double lon)
        Make sure longitude value is within [-180, 180] range.
        Parameters:
        lon - the longitude in degrees
        Returns:
        lon plus/minus multiples of 360, as needed to get in [-180, 180] range

      • isValid

        public boolean isValid()
        Replies true if lat is in the range [-90,90] and lon is in the range [-180,180]
        Returns:
        true if lat is in the range [-90,90] and lon is in the range [-180,180]

      • toIntervalLat

        public static double toIntervalLat​(double value)
        Clamp the lat value to be inside the world.
        Parameters:
        value - The value
        Returns:
        The value clamped to the world.

      • toIntervalLon

        public static double toIntervalLon​(double value)
        Returns a valid OSM longitude [-180,+180] for the given extended longitude value. For example, a value of -181 will return +179, a value of +181 will return -179.
        Parameters:
        value - A longitude value not restricted to the [-180,+180] range.
        Returns:
        a valid OSM longitude [-180,+180]

      • lat

        public double lat()
        Description copied from interface: ILatLon
        Returns the latitude, i.e., the north-south position in degrees.
        Specified by:
        lat in interface ILatLon
        Returns:
        the latitude or NaN if ILatLon.isLatLonKnown() returns false

      • lon

        public double lon()
        Description copied from interface: ILatLon
        Returns the longitude, i.e., the east-west position in degrees.
        Specified by:
        lon in interface ILatLon
        Returns:
        the longitude or NaN if ILatLon.isLatLonKnown() returns false

      • isWithin

        public boolean isWithin​(Bounds b)
        Determines if this lat/lon is within the given bounding box.
        Parameters:
        b - bounding box
        Returns:
        true if this is within the given bounding box.

      • isIn

        public boolean isIn​(java.awt.geom.Area a)
        Check if this is contained in given area or area is null.
        Parameters:
        a - Area
        Returns:
        true if this is contained in given area or area is null.

      • toDisplayString

        public java.lang.String toDisplayString()
        Returns this lat/lon pair in human-readable format.
        Returns:
        String in the format "lat=1.23456 deg, lon=2.34567 deg"

      • interpolate

        public LatLon interpolate​(LatLon ll2,
                          double proportion)
        Interpolate between this and a other latlon. If you don't care about the return type, use ILatLon.interpolate(ILatLon, double) instead.
        Parameters:
        ll2 - The other lat/lon object
        proportion - The proportion to interpolate
        Returns:
        a new latlon at this position if proportion is 0, at the other position it proportion is 1 and linearly interpolated otherwise.

      • getCenter

        public LatLon getCenter​(LatLon ll2)
        Get the center between two lat/lon points
        Parameters:
        ll2 - The other LatLon
        Returns:
        The center at the average coordinates of the two points. Does not take the 180° meridian into account.

      • distance

        public double distance​(LatLon ll)
        Returns the euclidean distance from this LatLon to a specified LatLon.
        Parameters:
        ll - the specified coordinate to be measured against this LatLon
        Returns:
        the euclidean distance from this LatLon to a specified LatLon
        Since:
        6166

      • distanceSq

        public double distanceSq​(LatLon ll)
        Returns the square of the euclidean distance from this LatLon to a specified LatLon.
        Parameters:
        ll - the specified coordinate to be measured against this LatLon
        Returns:
        the square of the euclidean distance from this LatLon to a specified LatLon
        Since:
        6166

      • toString

        public java.lang.String toString()
        Overrides:
        toString in class java.lang.Object

      • roundToOsmPrecision

        public static double roundToOsmPrecision​(double value)
        Returns the value rounded to OSM precisions, i.e. to MAX_SERVER_PRECISION.
        Parameters:
        value - lat/lon value
        Returns:
        rounded value