+ # 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.
+ SCALE = 10000000
+
+ def self.included(base)
+ base.scope :bbox, ->(bbox) { base.where(OSM.sql_for_area(bbox)) }
+ base.before_save :update_tile