Spatial Association Rules
Use two-step spatial computation technique to reduce computations.
Computation starts at the high level of spatial predicates like g_close_to (generalized close_to).
More detailed and finer, but more expensive, spatial computations are applied at lower concept levels only to those patterns that are large at the level of the predicate g_close_to.
- Filtration of large patterns saves a computations since much fewer spatial association relationships left at the lower concept levels.
Still the user is required to provide concept hierarchies.