+require "delegate"
+
module GeoRecord
+ # Ensure that when coordinates are printed that they are always in decimal degrees,
+ # and not e.g. 4.0e-05
+ # Unfortunately you can't extend Numeric classes directly (e.g. `Coord < Float`).
+ class Coord < DelegateClass(Float)
+ def initialize(obj)
+ super(obj)
+ end
+
+ def to_s
+ format("%.7f", self)
+ end
+ end
+
# This scaling factor is used to convert between the float lat/lon that is
# returned by the API, and the integer lat/lon equivalent that is stored in
# the database.
# Is this node within -90 >= latitude >= 90 and -180 >= longitude >= 180
# * returns true/false
def in_world?
- return false if self.lat < -90 or self.lat > 90
- return false if self.lon < -180 or self.lon > 180
- return true
+ return false if lat < -90 || lat > 90
+ return false if lon < -180 || lon > 180
+
+ true
end
def update_tile
# Return WGS84 latitude
def lat
- return self.latitude.to_f / SCALE
+ Coord.new(latitude.to_f / SCALE)
end
# Return WGS84 longitude
def lon
- return self.longitude.to_f / SCALE
- end
-
-private
-
- def lat2y(a)
- 180/Math::PI * Math.log(Math.tan(Math::PI/4+a*(Math::PI/180)/2))
+ Coord.new(longitude.to_f / SCALE)
end
end