GISQL: a query language interpreter for geographical information systems
Proceedings of the third IFIP WG2.6 working conference on Visual database systems 3 (VDB-3)
Information systems for urban planning
Information systems for urban planning
Interoperating Geographic Information Systems
Interoperating Geographic Information Systems
VISCO: Bringing Visual Spatial Querying to Reality
VL '98 Proceedings of the IEEE Symposium on Visual Languages
Extending the metaphor GIS query language and environment to 3D domains
Proceedings of the Working Conference on Advanced Visual Interfaces
Dealing with geographic continuous fields: the way to a visual GIS environment
Proceedings of the working conference on Advanced visual interfaces
Towards a new visual query language for GIS
DBA'06 Proceedings of the 24th IASTED international conference on Database and applications
A multidimensional model representing continuous fields in spatial data warehouses
Proceedings of the 17th ACM SIGSPATIAL International Conference on Advances in Geographic Information Systems
Physical design and implementation of spatial data warehouses supporting continuous fields
DaWaK'10 Proceedings of the 12th international conference on Data warehousing and knowledge discovery
An OpenGIS®-based approach to define continuous field data within a visual environment
VISUAL'05 Proceedings of the 8th international conference on Visual Information and Information Systems
Modeling and Querying Continuous Fields with OLAP Cubes
International Journal of Data Warehousing and Mining
Querying spatial and temporal data by condition tree: two examples based on environmental issues
ICCSA'13 Proceedings of the 13th international conference on Computational Science and Its Applications - Volume 1
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In the present paper we introduce a visual query language, Phenomena, able to manage continuous fields, which represent real-world events. In GIS applications, continuous fields represent phenomena related to the environment and its resources. Recently, much attention has been devoted to the field view of geographic phenomena, where the geographic world can be described by a number of variables, each measurable at any point. While objects are distinguished by their dimensions, and can be associated with points, lines, or areas, fields can be distinguished by what varies, and how smoothly. Thus, when dealing with continuous fields, a basic requirement is represented by users' capability to capture some features of a scenario, by selecting an area of interest and handling the heterogeneous events involved. Phenomena makes this task easy to implement, thanks to a quite intuitive visual representation of both continuous fields and conditions, which involve them. A peculiar feature of the visual language is the use of geometries to select portions of continuous fields, on the basis of spatial conditions. The heterogeneous nature of fields and objects is also reflected in the visualization of query results.