GeoCrowd: enabling query answering with spatial crowdsourcing.
Leyla KazemiCyrus ShahabiPublished in: SIGSPATIAL/GIS (2012)
Keyphrases
- query answering
- data exchange
- data complexity
- answering queries
- integrity constraints
- incomplete information
- data integration
- conjunctive queries
- query rewriting
- spatial data
- query containment
- data integration systems
- schema mappings
- dl lite
- regular path queries
- inconsistent databases
- magic sets
- ontology based data access
- data management
- query language
- np hard
- consistent query answering
- data model
- metadata
- database