artículo de publicación periódica.page.titleprefix A data model and query language for spatio-temporal decision support
| dc.contributor.author | Gómez, Leticia Irene | |
| dc.contributor.author | Kuijpers, Bart | |
| dc.contributor.author | Vaisman, Alejandro Ariel | |
| dc.date.accessioned | 2022-11-14T15:49:35Z | |
| dc.date.available | 2022-11-14T15:49:35Z | |
| dc.date.issued | 2010 | |
| dc.description.abstract | "In recent years, applications aimed at exploring and analyzing spatial data have emerged, powered by the increasing need of software that integrates Geographic Information Systems(GIS) and On-Line Analytical Processing (OLAP). These applications have been called SOLAP (Spatial OLAP). In previous work, the authors have introduced Piet, a system based on a formal data model that integrates in a single framework GIS, OLAP (On-Line Analytical Processing), and Moving Object data. Real-world problems are inherently spatio-temporal. Thus, in this paper we present a data model that extends Piet, allowing tracking the history of spatial data in the GIS layers. We present a formal study of the two typical ways of intro ducing time into Piet: timestamping the thematic layers in the GIS, and timestamping the spatial objects in each layer. We denote these strategies snapshot-based and timestamp-based representations, respectively, following well-known terminology borrowed from temporal databases. We present and discuss the formal model for both alternatives. Based on the timestamp-based representation, we introduce a formal First-Order spatio-temporal query language, which we denote Lt, able to express spatio-temporal queries over GIS, OLAP, and trajectory data. Finally, we discuss implementation issues, the update operators that must be supported by the model, and sketch a temporal extension to Piet-QL, the SQL-like query language that supports Piet." | |
| dc.identifier.issn | 1384-6175 | |
| dc.identifier.uri | https://ri.itba.edu.ar/handle/123456789/3996 | |
| dc.language.iso | en | |
| dc.relation | info:eu-repo/semantics/altIdentifier/doi/10.1007/s10707-010-0110-7 | |
| dc.subject | OLAP | en |
| dc.subject | BASES DE DATOS | es |
| dc.subject | ESPACIO Y TIEMPO | es |
| dc.title | A data model and query language for spatio-temporal decision support | en |
| dc.type | Artículos de Publicaciones Periódicas | es |
| dc.type | info:eu-repo/semantics/acceptedVersion | |
| dspace.entity.type | Artículo de Publicación Periódica |