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to the following aspects : singleness of the records, classification of the data in agreement with their environment (soil, 
water, air...), and structuring of data groups in a hierarchical system. 
Independently of difficulties to get access to existing data, or to rebuild the history of sites, we underline many 
imprecision especially for geo-referencing the objects. Now, geographical data referencing is primordial for site 
investigations and necessary for the GIS conception. To solve this problem, the DGPS use is the best solution since the 
implementation is easy, not much expensive, and providing with a precision from metric to sub-metric. At last, the user 
can get locations but also to re-locate cores from older investigation. 
One part of the site history reconstitution is possible from the use, the treatment and the interpretation of aerial 
photograph. From the oldest view to the most recent, we can study the global evolution from site to brown field state, 
and for example identify and locate the primary sources of pollution. 
As a conclusion, these aspects have been included in a methodological guide for the building of a GIS dedicated to 
industrial site pollution diagnosis. This state-of-the-art guide should allow industrial site owners and administrators to 
better define investigation techniques and environmental management tools. 
ACKNOWLEDGMENTS 
We thank Philippe Branchu' for the reading of this paper. 
REFERENCES 
Basquiat J.P., 1998. Utiliser les SIG : le dossier des Systèmes d'Information Géographique. 
http://www.admiroutes.asso.fr/action/THEME/nti/sig/utisig.htm, 7 p. 
Chaussier J.-B;, Morer J., 1981. Manuel du prospecteur minier. Manuels & Méthodes n?2. Orléans, France, Eds BRGM, 
273 p. 
IGN, http://www.ign.fr/ 
Star J.L., Dickinson H., 1996. Chapitre 5 : La saisie et l'entrée des données. In : Systèmes d'information géographique : 
Notes de cours, notions de base. Québec, Université de Laval, LATIG, Département de géographie. Goodchild M.F., 
Kemp K.K., Thériault M., Roche Y. (Eds), 1** édition, Vol. 1, pp 42-51. 
  
International Archives of Photogrammetry and Remote Sensing. Vol. XXXIII, Part B7. Amsterdam 2000. 1161