The hydrographic division is the set of four hierarchical partitions of the French territory carried out according to descending hydrographic areas:
— hydrographic region (1st order),
— hydrographic sector (2nd order),
— hydrographic subsector (3 rd order),
hydrographic area (4th order).
A hydrographic region is divided into a maximum of 10 sectors, and one sector is divided into a maximum of 10 subsectors.
The definition of sectors and their limits is under the responsibility of the Water Agencies.
The BDCarthage Guadeloupe is maintained by DEAL Guadeloupe. The structure of the database is identical to the metropolitan format.The Carthage Guadeloupe BD is a version validated by the EIS but not by the IGN and therefore problems of incompatibility with IGN referentials can occur (and that an update “officialise” the Carthage BD with IGN validation).
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