Quantity Based Aggregation (QBA) is a subject that is closely related to inference in databases. The goal is to enforce k out of N disclosure control. In this paper we work on QBA problems in the context of cadastral databases, and we focus on one particular problem: how to prevent a user from accessing all parcels in a region. This work is a new version of the model presented in [2, 3] where we introduce the concept of "Dominant Zones". This concept increases the availability of the data while preserving their confidentiality. Moreover, we provide a more detailed discussion on security aspects of different choices of the model's parameters.
