Encyclopedia of Database Systems

2018 Edition
| Editors: Ling Liu, M. Tamer Özsu

Spatial Operations and Map Operations

  • Michel Scholl
  • Agnès Voisard
Reference work entry
DOI: https://doi.org/10.1007/978-1-4614-8265-9_359

Synonyms

Layer Algebra; Map Algebra; Theme Algebra

Definition

Map operations refer to the operations that an end user performs on maps stored in a database. Map information is stored according to themes (for instance, cities, roads, or population), sometimes called layers in the GIS terminology. The maps considered here are stored in a vector format – as opposed to a raster format such as a grid of pixels – and can be 1 dimensional (e.g., a network of roads for a navigation system), 2 dimensional (e.g., a map of land-use for regional planning activities), or 2.5 dimensional if the elevation at certain locations is considered (for instance, the height of a building in an architecture project). A map is made of what is often called geographic objects. A geographic object (for instance, a city) has two parts, an alphanumeric one (e.g., its name and population) and a spatial one (e.g., a polygon), usually called spatial object. The alphanumeric attributes of a geographic object constitute...

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Recommended Reading

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    Tomlin D. A map algebra. In: Proceedings of the Harvard Computer Graphic Conference; 1983.Google Scholar

Copyright information

© Springer Science+Business Media, LLC, part of Springer Nature 2018

Authors and Affiliations

  1. 1.Cedric-CNAMParisFrance
  2. 2.Fraunhofer Institute for Software and Systems Engineering (ISST)BerlinGermany

Section editors and affiliations

  • Ralf Hartmut Güting
    • 1
  1. 1.Computer ScienceUniversity of HagenHagenGermany