Paper Info
Title
Phenomena: a visual query language for continuous fields
Abstract
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.
Year
DOI
Venue
2003
10.1145/956676.956696
GIS
Keywords
Field
DocType
geographic world,continuous field,geographic phenomenon,visual query language,heterogeneous nature,query result,intuitive visual representation,heterogeneous event,gis application,visual language,geographic information system
Visual language,Visual query,Visualization,Computer science,Measure (mathematics),Artificial intelligence,GIS applications,Area of interest,Machine learning
Conference
ISBN
Citations 
PageRank 
1-58113-730-3
13
0.85
References 
Authors
7
5
Name
Order
Citations
PageRank
Luca Paolino113221.03
Genoveffa Tortora21477151.59
Monica Sebillo322337.10
Giuliana Vitiello442455.93
Robert Laurini537163.89