A User-Centered Location Model
Personal and Ubiquitous Computing
Location Models from the Perspective of Context-Aware Applications and Mobile Ad Hoc Networks
Personal and Ubiquitous Computing
A Location Model for Communicating and Processing of Context
Personal and Ubiquitous Computing
Personal and Ubiquitous Computing
A Hybrid Location Model with a Computable Location Identifier for Ubiquitous Computing
UbiComp '02 Proceedings of the 4th international conference on Ubiquitous Computing
A Fine-Grained Addressing Concept for GeoCast
ARCS '02 Proceedings of the International Conference on Architecture of Computing Systems: Trends in Network and Pervasive Computing
Challenges in Location-Aware Computing
IEEE Pervasive Computing
An ontology for context-aware pervasive computing environments
The Knowledge Engineering Review
On location models for ubiquitous computing
Personal and Ubiquitous Computing
MiddleWhere: a middleware for location awareness in ubiquitous computing applications
Proceedings of the 5th ACM/IFIP/USENIX international conference on Middleware
Resolving uncertainty in context integration and abstraction: context integration and abstraction
Proceedings of the 5th international conference on Pervasive services
Semantics of Place: Ontology Enrichment
IBERAMIA '08 Proceedings of the 11th Ibero-American conference on AI: Advances in Artificial Intelligence
A practical implementation of indoor location-based services using simple WiFi positioning
Journal of Location Based Services
A topology-based semantic location model for indoor applications
Proceedings of the 16th ACM SIGSPATIAL international conference on Advances in geographic information systems
Semantic enrichment of places: Ontology learning from web
International Journal of Knowledge-based and Intelligent Engineering Systems - Intelligent agents and services for smart environments
Ontonym: a collection of upper ontologies for developing pervasive systems
Proceedings of the 1st Workshop on Context, Information and Ontologies
Towards Ontology-Based Formal Verification Methods for Context Aware Systems
Pervasive '09 Proceedings of the 7th International Conference on Pervasive Computing
Situvis: A Visual Tool for Modeling a User's Behaviour Patterns in a Pervasive Environment
Pervasive '09 Proceedings of the 7th International Conference on Pervasive Computing
Context life cycle management in smart space environments
Proceedings of the 3rd workshop on Agent-oriented software engineering challenges for ubiquitous and pervasive computing
Proceedings of the 2009 international conference on Pervasive services
The Use of Context-Aware Policies and Ontologies to Facilitate Business-Aware Network Management
Journal of Network and Systems Management
NavTag: An Inter-Working Framework Based on Tags for Symbolic Location Coordinates for Smart Spaces
UIC '09 Proceedings of the 6th International Conference on Ubiquitous Intelligence and Computing
Agent-Based Context Consistency Management in Smart Space Environments
SOCASE '09 Proceedings of the AAMAS 2009 International Workshop on Service-Oriented Computing: Agents, Semantics, and Engineering
Realising context-sensitive mobile messaging
OTM'07 Proceedings of the 2007 OTM confederated international conference on On the move to meaningful internet systems - Volume Part I
Situvis: A sensor data analysis and abstraction tool for pervasive computing systems
Pervasive and Mobile Computing
A top-level ontology for smart environments
Pervasive and Mobile Computing
Energy efficient continuous location determination for pedestrian information systems
MobiDE '12 Proceedings of the Eleventh ACM International Workshop on Data Engineering for Wireless and Mobile Access
Making sense of location context
Proceedings of the 1st International Workshop on Context Discovery and Data Mining
Indoor pedestrian navigation based on hybrid route planning and location modeling
Pervasive'12 Proceedings of the 10th international conference on Pervasive Computing
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Location-aware systems provide customised services or applications according to users' locations. While much research has been carried out in developing models to represent location information and spatial relationships, it is usually limited to modelling simple environments (cf. [13,19,3]). This paper proposes a unified space model for more complex environments (e.g., city plan or forest). This space model provides a flexible, expressive, and powerful spatial representation. It also proposes a new data structure - an integrated lattice and graph model - to express comprehensive spatial relationships. This structure not only provides multiple graphs at different abstraction levels, but it also collapses the whole map into smaller local graphs. This mechanism is beneficial in reducing the complexity of creating and maintaining a map and improving the efficiency of path finding algorithms.