This dataset contains the probabilities of positioning failure for a use case involving positioning safety analyses for Unmanned Aerial Vehicles (UAVs), studied within the theoretical framework of the DIA (Detection-Identification-Adaptation) estimator. The objective of the research is to assess the positioning safety of UAVs in various locations throughout Europe. The dataset was generated through simulations that model the DIA estimator and the probability of positioning failure considering GPS-based positioning. It includes the resulting probability values for the locations considered across Europe.