A data model and query language for spatio-temporal decision support

Gómez, Leticia Irene; Kuijpers, Bart; Vaisman, Alejandro Ariel

Artículo de Publicación Periódica:
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