Spatio-temporal Information Systems in a Statistical Context
The Italian National Statistics Institute is currently integrating its various spatio-temporal data collections. It has been developed an integrated system, whose implementation relied on Web and relational technologies to cope with data heterogeneity. The system provides users with many di.erent classes of functions with which to analyse and visualise territorial data. It can be viewed as a spatio-temporal data warehouse, where space and time are the main access dimensions to statistical data, but also where space can be analysed according to its temporal mutations as a preliminary step in the design activity of a statistical survey. The system overcomes a drawback of current commercial data warehouse systems, which are not able to cope with the dynamic behaviour of a dimension - that is, its temporal evolution.
KeywordsCensus Tract Data Warehouse Lombardia Region Territory Evolution Multidatabase System
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