Dataset Guide

Dataset: USDHS FEMA 100-Year Flood Zones
Provided by Federal Geographic Data Committee
Updated 13 Jan 2021

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Dataset summary

The dataset on this page is a cache of the dataset It is a snapshot of the dataset as it appeared on 09 Jun 2021 18:41 GMT. The current dataset could have changed in the meantime. Attribution: Contains data retrieved from

This map represents Flood Insurance Rate Map (FIRM) data important for floodplain management, mitigation, and insurance activities for the National Flood Insurance Program (NFIP). The National Flood Hazard Layer (NFHL) data present the flood risk information depicted on the FIRM in a digital format suitable for use in electronic mapping applications. The NFHL database is a subset of the information created for the Flood Insurance Studies (FIS) and serves as a means to archive a portion of the information collected during the FIS. The NFHL data incorporates Digital Flood Insurance Rate Map (DFIRM) databases published by Federal Emergency Management Agency (FEMA). The 100-year flood is referred to as the 1% annual exceedance probability flood, since it is a flood that has a 1% chance of being equaled or exceeded in any single year. The primary risk classifications used are the 1-percent-annual-chance flood event, the 0.2-percent-annual-chance flood event, and areas of minimal flood risk....

Dataset:USDHS FEMA 100-Year Flood Zones
Provider:Federal Geographic Data Committee
Licence:License information is derived automatically. Refer to source for license information before using this data.
Licence information not found.
Country:United States of America

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