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Spatio-temporal Query Languages

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Encyclopedia of GIS

Synonyms

Spatio-temporal data models; SQL/MM; SQL/Temporal; Operator, spatial; Operator, temporal; Bi-temporal; ISO; Operator, topological; Operator, metric

Definition

A spatio-temporal database is a database that embodies spatial, temporal and spatio-temporal database concepts and captures simultaneously spatial and temporal aspects of data. Spatio‐temporal databases allow sophisticated queries over time and space to be stated [6]. Spatio‐temporal query languages are the query languages used to query spatio‐temporal databases.

Though we could use the basic data types in SQL to represent spatio‐temporal data, however, the queries would be very complicated to write. In some cases, we may not be able to answer some queries. For example, assume there is a traveler. If we use date to represent the start and end of a time interval while the person remains at the same place, and two floating point numbers to represent the coordinates of a point in a two‐dimensional space which is the...

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Chen, C. (2008). Spatio-temporal Query Languages. In: Shekhar, S., Xiong, H. (eds) Encyclopedia of GIS. Springer, Boston, MA. https://doi.org/10.1007/978-0-387-35973-1_1332

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