The "D" is exactly one third the width of the playable area. Thus the radius should be 1/6th that of the playable width of the table. The baulk line is 1/5th of the length of the table. The blue is in the middle, the pink is in the middle of the centre and corner pockets and the black is 1/11th from the top cushion.
I think I can find a diagram some where.