Defining Spatio-Temporal Granularities for Raster Data
The notion of granularity is used in several areas of computing. In temporal databases, granularity relates to the fact that the time frame associated to an event of interest (e.g., an accident) can be envisaged at several levels of detail (e.g., hour, day, month, etc.). Similarly, granularity in data warehousing is the level of detail at which facts (e.g., sales) are captured in dimensions (e.g., product, store, and day). However, there is no commonly-agreed definition of spatial or spatio-temporal granularities. Sometimes, the term spatial granularity is confounded with multiple resolutions. Further, the few proposals about them are mainly focused on the vector data model. In this paper, we define spatial and spatio-temporal granularities for raster data models. In our framework, relations and operations between spatial and spatio-temporal granularities are also defined.
KeywordsSpace Domain Raster Data Poral Granularity Temporal Granularity Time Granule
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- 1.Belussi, A., Combi, C., Pozzani, G.: Formal and conceptual modeling of spatio-temporal granularities. In: Proceedings of the International Database Engineering and Applications Symposium, pp. 275–283. ACM (2009)Google Scholar
- 3.Cattell, R.G.G., Berler, D.K.B.M., Eastman, J., Jordan, D., Russell, C., Schadow, O., Stanienda, T., Velez, F. (eds.): The Object Data Standard: ODMG 3.0. Morgan Kaufmann Publishers Inc., San Francisco (2000)Google Scholar
- 5.Frank, A.U.: Map Algebra Extended with Functors for Temporal Data. In: Akoka, J., Liddle, S.W., Song, I.-Y., Bertolotto, M., Comyn-Wattiau, I., van den Heuvel, W.-J., Kolp, M., Trujillo, J., Kop, C., Mayr, H.C. (eds.) ER Workshops 2005. LNCS, vol. 3770, pp. 194–207. Springer, Heidelberg (2005)CrossRefGoogle Scholar
- 11.Shekhar, S., Xiong, H. (eds.): Encyclopedia of GIS. Springer, Heidelberg (2008)Google Scholar
- 12.Tomlin, C.D., Berry, J.K.: A mathematical structure for cartographic modeling in environmental analysis. In: Proceedings of the 39th Symposium of the American Congress on Surveying and Mapping, pp. 269–283 (1979)Google Scholar