set import position

[EfrenCando_Narváez]

Hello everyone

I am working in cityengine for the construction of virtual cities, however after realizing the import of the terrain and applying the rules for extrusion of the buildings, I can realize that there are several blank spaces in the map. Could you please help me with

a guide in some way to detect those blank spaces in order to be filled importing buildings?

Attached please find the image of the current situation of the reconstuction and marked with red circles the positions would like to locate the buildings by code