Originally this scenery started in 2005 by a photorealistic zone (4 m/pix resolution). The area was a square whose center was Paris and whose diagonal was going from Roissy (LFPG) to Versailles (LFPZ).
The first DSF version of this scenery had to be adapted over the poorly positioned river of X-Plane 9.
With X-Plane 10 and its new DSF, the Seine river has recovered its proper place, this version of PARIS is mostly a repositioning of the city and its surroundings.