Notre sauce c'est l'open source spatial, ça fait long temps que je cherche à créer un datawarehouse Spatial sous postgis, j'ai trouvé des bonnes outils open source qui ferais bien ça ( PostGeoOLAP+JUMP+ROLAP)
"Spatial OLAP can be defined as a visual platform built especially to support rapid and easy spatiotemporal analysis and exploration of data following a multidimensional approach comprised of aggregation levels available in cartographic displays as well as in tabular and diagram displays." Bédard, 1997.
Concepts:
http://spatialolap.scg.ulaval.ca/concepts.asp
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