# File lib/geokit/mappable.rb, line 500
    def to_span
      lat_span = (@ne.lat - @sw.lat).abs
      lng_span = (crosses_meridian? ? 360 + @ne.lng - @sw.lng : @ne.lng - @sw.lng).abs
      Geokit::LatLng.new(lat_span, lng_span)
    end