An Efficient Index for Ranking in Spatial Database
Spatial database systems manage large collections of geographic entities, which apart from spatial attributes contain non-spatial information. Spatial objects in reality are associated with multiple quality attributes in addition to their spatial locations. Traditional spatial queries and joins focus on manipulating only spatial locations and distances, but they ignore the importance of quality attributes. The dominance comparison is suitable for comparing two objects with respect to multiple quality attributes. For the sake of simplicity, the authors assume that the domain of each quality attribute is fully ordered (e.g. integer domain).