Sommaire de la publication

Sommaire de la publication

BĂ©dard,Y., M.J. Proulx & S. Rivest, 2005, Enrichissement du OLAP pour l’analyse gĂ©ographique : exemples de rĂ©alisation et diffĂ©rentes possibilitĂ©s technologiques, 1re JournĂ©e Francophone sur les EntrepĂ´ts de DonnĂ©es et l’Analyse en ligne (EDA 2005), UniversitĂ© Lyon-2, Lyon, France, 10 juin, confĂ©rencier invitĂ©

Résumé

D’importants efforts sont dĂ©ployĂ©s depuis une quinzaine d’annĂ©es pour mettre en place des systèmes d’aide Ă  la dĂ©cision gĂ©ospatiale. Ces systèmes reposent toutefois sur les systèmes d’information gĂ©ographique (SIG) et les approches transactionnelles habituelles (OLTP) pour produire l’information gĂ©odĂ©cisionnelle, souvent avec des dĂ©lais inacceptables, voire des coĂ»ts prohibitifs au point d’en laisser tomber la production. Par consĂ©quent, les nouvelles applications Spatial OLAP (SOLAP) arrivent Ă  point pour permettre efficacement de dĂ©ploiement d’applications d’aide Ă  la dĂ©cision et d’exploration des donnĂ©es gĂ©ospatiales. Cet article prĂ©sente les besoins et avantages liĂ©s aux applications SOLAP, particulièrement Ă  l’exploration cartographique des donnĂ©es. Ensuite, il plusieurs exemples d’applications SOLAP pour ensuite dĂ©crit les principaux concepts sous-tendant le SOLAP. Une catĂ©gorisation en trois familles de solutions y est proposĂ©e, soit OLAP-dominant, SIG-dominant et intĂ©grĂ©e. Chaque exemple d’application y est positionnĂ© et les avantages d’une technologie SOLAP y sont prĂ©sentĂ©s.

Abstract

Important efforts have been made for the last fifteen years to set up geospatial decision support systems. However, these systems are based on geographic information systems (GIS) and usual transactional approaches (OLTP) to produce geodecisional information, often with unacceptable delays and prohibitive costs up to the point of dropping the production. Consequently, the new Spatial OLAP (SOLAP) applications arrive just in time to allow effective implementations of geospatial decision support systems. This article highlights the needs and the advantages related to SOLAP applications, particularly for cartographic data exploration. Given that such applications have almost never been tackled by the computer science community, this paper does not discuss the traditional scientific issues of OLAP applications which are widely addressed by this community. Instead, it presents concrete SOLAP examples and an overview of the main underlying concepts. A categorization in three families of solutions is proposed: OLAP-dominant, GIS-dominant and integrated solution. Each given example of applications is then positioned in regards to these categories and the advantages to use the integrated solution are addressed. We finally conclude with a brief overview of the typical “hidden difficulties” related to geographic data which are one of our research preoccupations.