Conclusions of the Toja-Vikas International Survey:
Different types of anomalies found. The first is a discrete type, a typical radar signature of a pillar.
The ground penetrating radar survey shows anomalies arising from ancient and contemporaneous structures like pillars, foundation walls or slab flooring.
And the question marks:
These anomalies could be geological in nature, or remains of buried or collapsed dwellings levelled off for overlaying new constructions.
Not all hyperbola-shaped radar anomaly correspond to pillars or wall foundations. It could also be debris.