Keyphrases
- data model
- geographic information systems
- data modeling
- layered architecture
- object oriented systems
- object model
- schema integration
- spatial data
- geographical information systems
- spatial databases
- application programmer
- spatial reasoning
- remote sensing
- spatial analysis
- databases
- road network
- spatiotemporal databases
- gis data
- database systems
- software maintenance
- geographic information
- operating system
- d objects
- database management systems
- distributed systems
- data management
- data integration
- data sources
- object recognition
- software engineering
- web gis
- database