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Yon sitwèb ofisyèl pou gouvènman ameriken an

Dot gov

Official websites use .gov

A .gov website belongs to an official government organization in the United States.

Https

Secure .gov websites use HTTPS

A lock ( ) or https:// means you’ve safely connected to the .gov website. Share sensitive information only on official, secure websites..

alert - warning

Yo pa tradui paj sa a nan lang Kreyòl ayisyen. Ale sou Kreyòl ayisyen paj la pou jwenn resous nan lang sa a.

National Geodetic Vertical Datum (NGVD) of 1929

National standard reference datum for elevations, formerly referred to as Mean Sea Level (MSL) of 1929. NGVD 1929 may be used as the reference datum on some Flood Insurance Rate Maps (FIRMs).

Glossary Section
NFIP - National Flood Insurance Program