Another thing to beware of: SketchUp stores ALL units in inches - internal. Always. It is only right when a unit is displayed in the UI that it is converted into the model units. So all coordinate data you get from SketchUp is in the Length class - which is a subclass of Float with extra methods to convert into model units for presentation. Something to beware of when you output the data. More info on units in SketchUp: http://www.thomthom.net/thoughts/2012/08/dealing-with-units-in-sketchup/