Monitoring Electromagnetic Pollution: A GIS-Based Visual Approach
MDIC '01 Proceedings of the Second International Workshop on Multimedia Databases and Image Communication
Terminological Default Reasoning about Spatial Information: A First Step
COSIT '99 Proceedings of the International Conference on Spatial Information Theory: Cognitive and Computational Foundations of Geographic Information Science
Mental representation and processing of geographic knowledge
Phenomena: a visual query language for continuous fields
GIS '03 Proceedings of the 11th ACM international symposium on Advances in geographic information systems
Dealing with geographic continuous fields: the way to a visual GIS environment
Proceedings of the working conference on Advanced visual interfaces
A usability-driven approach to the development of a 3D web-GIS environment
Journal of Visual Languages and Computing
Extending the metaphor GIS query language and environment to 3D domains
Proceedings of the Working Conference on Advanced Visual Interfaces
Phenomena - A visual environment for querying heterogenous spatial data
Journal of Visual Languages and Computing
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This paper reports on the evolution of the spatial (sketch-based) query language VISCO and its implementation. The first design of VISCO's query language was presented at VL '97. The language is based on a strong naive physics metaphor for query objects (e.g. marbles, nails, rubberbands). We shortly review the prominent aspects of the revised version of VISCO's query language. The main focus of this paper is on VISCO's implementation using city maps of Hamburg as example domain. Its innovative user interface consists of three interconnected components: a graphical (syntax-directed) query editor and visual language compiler, a browser for inspecting the query results, and a map viewer for browsing the spatial database. We also briefly report on the process of compiling, optimizing, and executing VISCO's queries.