Keyphrases
- range queries
- multiple users
- multi dimensional
- multi user
- efficient processing
- index structure
- spatial databases
- r tree
- cost model
- query processing
- metric space
- knn
- access structure
- multidimensional data
- query types
- similarity queries
- range query processing
- virtual world
- management system
- spatial queries
- augmented reality
- continuous queries
- databases