The Management of Oyster Culture Leases and Production
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physical parametres (essentially emerging time, position in terms of productivity,
etc...). As market values are known, the comparison of the two might allow to refine
the notion of anticipated parcel value
Conclusion
The shell culture cadastre clearly is an essential element of coastal management in
France, a) for the economic value of shell production, b) for its impact on coastal
environment. Its digitization is underway within Affaires Maritimes, the
Administration in charge, with technical assistance by Ifremer. For lease management
itself, the transition from paper maps to graphical files associated to a semantic data
base will not only alleviate the traditional task of Affaires Maritimes, but also open
new possibilities, namely the spatial illustration of queries made on the data base,
which was otherwise unfeasible.
For wider purposes, several bodies are interested in possessing the digitized
cadastre. Among them, Ifremer is in charge of dealing with biological and
environmental aspects and providing advice to all possible actors in the coastal zone.
The cadastre is a fundamental layer of anticipated GIS’s to be set up in its various
coastal stations. If only a couple of applications of data mixing were shown in this