AA-maps - Attenuation and accumulation maps for spatio-temporal event visualisation

Catarina Albino, João Moura Pires, Nuno Datia, Ricardo Almeida Silva, Maribel Yasmina Santos

Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review

3 Citations (Scopus)


Some phenomena, such as crimes in a city, fires occurred in a country and road accidents can be interpreted as sets of spatio-temporal events. A spatio-temporal event is described by a geographic location, a time instant and other characterising attributes.The cartographic visualisation of spatio-temporal events remains unresolved, due to the challenges related with portraying multiple dimensions simultaneously: the spatial, the temporal and the semantic (zero or more dimensions) phenomenon's components. In this context, this article presents the Attenuation and Accumulation Maps (AA-Maps). The main idea of this visualisation analytic approach consists in showing in a map, the resulting effect of combining attenuation and accumulation, from a temporal reference of observation, given a spatio-temporal Level of Detail (LoD). Imagine the footprints of people crossing a garden in various directions. They leave different traces that summarize the cumulative effect of the footprints on the grass, which is attenuated as time goes by.AA-Maps support different combinations of attenuation and accumulation functions. In addition, this method also enables analysis with different Levels of Detail (LoD), both spatial and temporal. This allows distinct analytic perspectives of the phenomenon while promoting the search for the most suitable parametrization for its characteristics.

Original languageEnglish
Title of host publicationProceedings - 2017 21st International Conference Information Visualisation, iV 2017
PublisherInstitute of Electrical and Electronics Engineers Inc.
Number of pages4
ISBN (Electronic)9781538608319
Publication statusPublished - 2017
Event21st International Conference Information Visualisation, iV 2017 - London, United Kingdom
Duration: 11 Jul 201714 Jul 2017


Conference21st International Conference Information Visualisation, iV 2017
Country/TerritoryUnited Kingdom


  • Cartographic representation
  • Geovisual analytics
  • Spatio-temporal events


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