Ken is right -- the daisy wheel and other geometric design schemes are independent of any unit of measure.

However, it is quite easy to add that "dimension" (pardon the pun) to the method by making the radius of the wheel in your design drawings a known division of the radius in the actual building layout.

eg, your building's real size may be based on using a radius of 12 feet to draw the daisy wheel. If you make your drawings with a radius of 1 foot, you would have scale drawings -- 12 to 1 scale. Of course any scale can be used. At that point any dimension can be scaled off your drawings by setting the dividers to the two points in the drawing and stepping off 12 times.

You can certainly build using geometrical systems without using any standard unit of measure -- you can just draw it out using any arbitrary setting and say that the building will be 10 times this big and set your dividers and step off 10 times and make your own story pole or "rod". then use that rod to swing the arcs to lay it out full size on the ground, etc.

But more commonly, I would think, the builder was working with a commonly held unit of measurement in order to communicate with clients, suppliers, and tradesmen. My understanding is that the rod was a commonly used standard measurement for building.

Perhaps Ken can speak to that?