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OLAPing Field Data : a Theoretical and Implementation Framework

Bimonte S., Kang M.-A., Paolino L., Sebillo M., Zaamoune M., Vitiello G.

Fundamenta Informaticae

2014

Vol. 132, nr 2

267--290

Integration of spatial data into multidimensional models leads to the concept of Spatial OLAP (SOLAP). Usually, SOLAP models exploit discrete spatial data. Few works integrate continuous field data into dimensions and measures. In this paper, we provide a formal multidimensional model that supports measures and dimension as continuous field data, independently of their implementation. We provide also a proposal for a logical model allowing aggregation of field measures in a feasible ROLAP architecture.

A Decomposition Framework for Computing and Querying Multidimensional OLAP Data Cubes over Probabilistic Relational Data

Cuzzocrea A., Gunopulos D.

Fundamenta Informaticae

2014

Vol. 132, nr 2

239--266

Focusing on novel database application scenarios, where data sets arise more and more in uncertain and imprecise formats, in this paper we propose a novel decomposition framework for efficiently computing and querying multidimensional OLAP data cubes over probabilistic data, which well-capture previous kind of data. Several models and algorithms supported in our proposed framework are formally presented and described in details, based on well-understood theoretical statistical/ probabilistic tools, which converge to the definition of the so-called probabilistic OLAP data cubes, the most prominent result of our research. Finally, we complete our analytical contribution by introducing an innovative Probability Distribution Function (PDF)-based approach, which makes use of well-known probabilistic estimators theory, for efficiently querying probabilistic OLAP data cubes, along with a comprehensive experimental assessment and analysis over synthetic probabilistic databases.

Konstrukcja wielowymiarowej bazy danych geologicznych

Piórkowski A., Gajda G.

Studia Informatica

2009

Vol. 30, nr 2B

179-190

W artykule opisano tworzenie wielowymiarowej bazy danych geologicznych. Hurtownię danych utworzono na podstawie bazy danych odsłonięć geologicznych i bazy zagrożeń geologicznych. Dokonano wyróżnienia tabel wymiarów i tabel faktów. Zaproponowano schematy zasilenia tabel. Konstrukcję przeprowadzono w środowiskach IBM DataStage i Talend Open Studio.

A construction of multidimensional geological database is described in this article. Data warehouse is created using databases for outcrops and database for geoŹdynamic threats. The fact and dimension tables has been chosen. The schemas of loading are proposed. The construction is created for IBM DataStage and Talend Open Studio environments.