Using the center point for the transept and the origin for the choir, new set of flying buttresses are formed around the cathedral. The study shows the maximum length (in plan) of the flying buttresses until they reach to a building on site.
The longest reaching points are more valuable as entrances - vistas towards the building, from top to the bottom, 3 sections are more to be "built" parts while the open space in front of the south facade can ideally be used as ground level.
Taking the center of the transept as the origin with 60m diameter for the extension of the cathedral is making more sense in terms of the available space around the cathedral.
