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.
The list of hydrographic regions was established in Circular No. 91-50 of 12 February 1991 but the determination of their boundaries is under the responsibility of the Water Agencies.
The geometry is close to the BDTopo IGN which was used for its realisation.The BDCarthage Réunion is maintained by the DEAL Réunion.The BD Carthage Réunion is a version validated by the SIE but not by the \#x27;IGN and that therefore problems of incompatibility with IGN referentials can occur (and that#x27; an update &officialiseraquot; the Carthage comic with IGN validation).
__Origin__
The Martinique BDCarthage is maintained by DEAL Martinique.
__Partner organisations__
Ash, DEAL Martinique
__Links annexes__
* [see documentation on Sandre website](http://www.sandre.eaufrance.fr/?urn=urn:sandre:dictionnaire:ETH::entite:RegionHydro: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/f13e5f1198599936f23af47e0c37377298c74e3a)
Build on reliable and scalable technology
FAQ
Frequently Asked Questions
Some basic informations about API Store ®.
Operation and development of APIs are currently fully funded by company Apitalks and its usage is for free.
Yes, you can.
All important information such as time of last update, license and other information are in response of each API call.
In case of major update that would not be compatible with previous version of API, we keep for 30 days both versions so you will have enough time to transfer to new version. We will inform you about the changes in advance by e-mail.