The hydrographic division is l' all of the four hierarchical partitions of the French territory made according to decreasing hydrographic areas:
— hydrographic region (1st order),
— hydrographic sector (2nd order),
— hydrographic subsector (3 rd order),
— hydrographic area (4th order).
A hydrographic region is divided according to a maximum of 10 sectors, and one area is divided according to a maximum of 10 sub-sectors.
__Origin__
The BDCarthage Guiana is maintained by DEAL Guyana.
__Partner organisations__
Deal Guyane, SANDRE, AFB
__Links annexes__
* [see documentation on Sandre website](http://www.sandre.eaufrance.fr/?urn=urn:sandre:dictionnaire:ETH::entite:SecteurHydro:ressource:latest:::html)
* [see Dictionary & Hydrographic Reference (ETH)" on the Sandre website](http://www.sandre.eaufrance.fr/?urn=urn:sandre:notice:dictionnaire::theme:ETH:ressource:latest:::html)
[See this page on geo.data.gouv.fr](https://geo.data.gouv.fr/fr/datasets/69864b388b8e03101e7641b42c34115f3dae07ff)
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