Class: GeoRuby::SimpleFeatures::Point

Inherits:
Geometry
  • Object
show all
Defined in:
lib/georuby-extras.rb

Instance Method Summary collapse

Instance Method Details

#ellipsoidal_distance(point, a = 6378137.0, b = 6356752.3142) ⇒ Object

Implementation of the Vincenty ‘distance’ formula to find the ellipsoidal distance between points As per implementation by Chris Veness (www.movable-type.co.uk/scripts/latlong-vincenty.html) Default a/b values are for the WGS84 ellipsoid - other values may be specified



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# File 'lib/georuby-extras.rb', line 13

def ellipsoidal_distance(point, a = 6378137.0, b = 6356752.3142)
  Vincenty.distance(x.to_f, y.to_f, point.x.to_f, point.y.to_f, a.to_f, b.to_f)
end

#orig_ellipsoidal_distance ⇒ Object 



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# File 'lib/georuby-extras.rb', line 8

alias_method :orig_ellipsoidal_distance, :ellipsoidal_distance

#point_at_bearing_and_distance(bearing = 0.0, distance = 0.0, a = 6378137.0, b = 6356752.3142) ⇒ Object

Implementation of the Vincenty ‘direct’ formula to find a point based on a bearing and distance As per implementation by Chris Veness (www.movable-type.co.uk/scripts/latlong-vincenty-direct.html) Default a/b values are for the WGS84 ellipsoid - other values may be specified



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# File 'lib/georuby-extras.rb', line 20

def point_at_bearing_and_distance(bearing=0.0, distance=0.0, a = 6378137.0, b = 6356752.3142)
  Point.from_coordinates(Vincenty.point_from_lon_lat(lon.to_f,lat.to_f,bearing.to_f,distance.to_f,a.to_f,b.to_f))
end