Constraint relaxation of the polygon-polyline topological relation for geographic pictorial query languages.
Anna FormicaElaheh PourabbasMaurizio RafanelliPublished in: Comput. Sci. Inf. Syst. (2013)
Keyphrases
- constraint relaxation
- query language
- constraint satisfaction
- expressive power
- constraint optimization
- data model
- relational algebra
- database
- convex hull
- recursive queries
- relational operators
- databases
- constraint satisfaction problems
- conjunctive queries
- multi agent systems
- database systems
- upper bound
- genetic algorithm
- geographic information