ruby: random_location_circle

random_location_circle.rb

def	random_location_from(center_lat, center_lng, distance)
		radius = distance
		radiusInDegrees=radius/111000.to_f
		r = radiusInDegrees
		origin_x = center_lat
		origin_y = center_lng

		u = rand(0.00..1.00)
		v = rand(0.00..1.00)

		w = r * Math::sqrt(u)
		t = 2 * Math::PI * v
		x = w * Math::cos(t)
		y = w * Math::sin(t)
		lat = x + origin_x
		lng = y + origin_y
		location = [lat, lng]
		puts "#{location[0]}, #{location[1]}"
		location = [lat, lng]
end
#33.367540, 126.538781
puts random_location_from(33.367540,126.538781, 1000)