During hydraulic modelling, the centennial flood hazard was determined on the area. In addition to the envelope of this hazard, the water levels over the entire sector could be determined. In order to visualise these water heights, a set of profile, known as “reference profiles”, was positioned with an altimeter deviation of about 20 cm.
All of these ratings are linked to the General Level of France and are expressed in NGF meter.
The by-law distinguishes for each area the construction projects to be above or below the regulatory rating.
The regulatory rating is defined in the regulations as the reference rating increased by 5 cm for habitable or functional floor surfaces as well as for the use of water-resistant materials, and 30 cm for vulnerable equipment, including electrical installations.
The reference rating to be used is indicated on the regulatory zoning maps, it must be searched immediately upstream of the site.
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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.