Enumerative combinatorics
CHI '86 Proceedings of the SIGCHI Conference on Human Factors in Computing Systems
Spatial concepts, geometric data models, and geometric data structures
Computers & Geosciences - Special issue on GIS design models
A review and taxonomy of distortion-oriented presentation techniques
ACM Transactions on Computer-Human Interaction (TOCHI)
Querying spatial databases via topological invariants
PODS '98 Proceedings of the seventeenth ACM SIGACT-SIGMOD-SIGART symposium on Principles of database systems
Efficient implementation of multi-triangulations
Proceedings of the conference on Visualization '98
Constraint query languages (preliminary report)
PODS '90 Proceedings of the ninth ACM SIGACT-SIGMOD-SIGART symposium on Principles of database systems
Readings in information visualization: using vision to think
Readings in information visualization: using vision to think
Variable resolution triangulations
WADS '97 Selected papers presented at the international workshop on Algorithms and data structure
Topological queries in spatial databases
Journal of Computer and System Sciences
Guidelines for using multiple views in information visualization
AVI '00 Proceedings of the working conference on Advanced visual interfaces
Spatial SQL: A Query and Presentation Language
IEEE Transactions on Knowledge and Data Engineering
Spatial Databases, The Final Frontier
ICDT '95 Proceedings of the 5th International Conference on Database Theory
Using Hierarchical Spatial Data Structures for Hierarchical Spatial Reasoning
COSIT '97 Proceedings of the International Conference on Spatial Information Theory: A Theoretical Basis for GIS
COSIT '97 Proceedings of the International Conference on Spatial Information Theory: A Theoretical Basis for GIS
Towards a Formal Model for Multi-Resolution Spatial Maps
SSD '95 Proceedings of the 4th International Symposium on Advances in Spatial Databases
Lossless Representation of Topological Spatial Data
SSD '95 Proceedings of the 4th International Symposium on Advances in Spatial Databases
Constraint-Based Interoperability of Spatiotemporal Databases
SSD '97 Proceedings of the 5th International Symposium on Advances in Spatial Databases
Data Structures for Simplicial Multi-complexes
SSD '99 Proceedings of the 6th International Symposium on Advances in Spatial Databases
Generalizing Graphs Using Amalgamation and Selection
SSD '99 Proceedings of the 6th International Symposium on Advances in Spatial Databases
Zooming, multiple windows, and visual working memory
Proceedings of the Working Conference on Advanced Visual Interfaces
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We present a zooming model, based on a level-of-detail (LOD) approach, aimed at visualizing sequences of gradually simplified representations of a given geographic map. We first describe a set of basic zooming primitives as transitions between maps at different LOD. We then define a new multiple zooming primitive on top of the basic ones, and show theoretical results concerning this new primitive with practical implications. Finally, we put the proposed theoretical model into practice, and suggest an implementation of maps and zooming primitives in terms of PLA-structures, a topological invariant suitable for the inclusion in a visual interaction environment based on a focus + context approach.