Synonyms
Spatio-temporal information systems; Spatio-temporal informatics; Process; Snapshots; Matrices, geographic; Interaction, space-time; Timestamps; Event; Movement; Activity; Ontology, spatio-temporal; SNAP; SPAN; Reasoning, spatio-temporal
Definition
Geographic information is inherently spatial and temporal. Geographic applications often demand an integrative approach to examine changes and interactions over space and time. Temporal geographic information systems (GIS) are defined here as GIS capable of incorporating temporality into geospatial databases and enabling spatiotemporal query, analysis, and modeling. Adding time into geospatial databases is a far from trivial task. Currently, commercial or public‐domain temporal GIS support cell-based spatial data (i. e., rasters) or spatial data objects with one or restricted sets of simple geometries, mostly point- or line-based data only. Research-grade temporal GIS remain limited to pilot studies or prototypes....
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Notes
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The SNAP ontology is consistent with the map metaphor that addresses reality through a series of snapshots. Hence, geographic entities are occurrents at a given point in time. On the other hand, the SPAN ontology applies the idea of 4‐dimensionalism in which geographic entities are defined by their volumes in 3D space and 1D temporal occupancy as space-time continuants.
Recommended Reading
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Yuan, M. (2008). Temporal GIS and Applications. In: Shekhar, S., Xiong, H. (eds) Encyclopedia of GIS. Springer, Boston, MA. https://doi.org/10.1007/978-0-387-35973-1_1373
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