Determine the shape of your dome by laying coins on the deck of your pool at each location the walls of your dome will change direction. We call these "Points." When you are satisfied with the shape of your dome, replace each coin with a numbered mark using an indelible marker. You will need these marks later to line up your dome when installing (if, for any reason, you decide not to install a dome, these marks can be scrubbed off or they will fade away on their own with time.)
Once you create all your points, go around the pool clockwise and count them. These will be the points you measure to from your "AB line" in order to accurately measure for the dome. If you have any questions about setting up, please give us a call at 800-982-6966.