Modifications of fuzzy directional queries for spatial databases

A previously developed approach (M. Cobb and F. Petty, 1998) for determining directional and spatial relationships has been based on the partitioning of the Minimum Bounding Rectangle (MBR) that represents the underlying actual spatial object. This development took an approach which allowed a very computationally efficient determination of directions. However the simplifications caused some anomalous cases to possibly occur. The paper provides some modifications of the reference area and axis weight used to compute directions. This permits a better representation of the intuition of certain directional cases without being computationally inefficient.