Hi, "République-Éperon"  is the name of the two neighborhoods undergoing regeneration.
The building is a truncated parallelepiped (one side H=22, the other side H=12), under construction:
https://clemillet.com/projects/complexe-culturel-et-evenementiel-de-lembarcadere/
It is located right next to the old ferry terminal (Boulogne-sur-Mer-Folkestone), disused, hence the representation of old access roads now condemned.