FEMA Floodplain
A one-hundred-year flood is a flood event that has a 1% probability of occurring in any given year. The 100-year flood is also referred to as the 1% flood, since its annual exceedance probability is 1%,[1] or as having a return period of 100-years. The 100-year flood is generally expressed as a flowrate. Based on the expected 100-year flood flow rate in a given creek, river or surface water system, the flood water level can be mapped as an area of inundation. The resulting floodplain map is referred to as the 100-year floodplain, which may figure very importantly in building permits, environmental regulations, and flood insurance. Flood hazard areas identified on the Flood Insurance Rate Map are identified as a Special Flood Hazard Area (SFHA). SFHA are defined as the area that will be inundated by the flood event having a 1-percent chance of being equaled or exceeded in any given year. The 1-percent annual chance flood is also referred to as the base flood or 100-year flood.
Resources
7 resources available
-
CSV
CSV -
File Geodatabase
ZIP -
GeoJSON
GEOJSON -
KML
KML -
Shapefile
ZIP -
ArcGIS Hub Dataset
WEB -
ArcGIS GeoService
REST
Find Related Datasets
Search by Tags
Click any tag below to search for similar datasets
Complete Metadata
| @type | dcat:Dataset |
|---|---|
| accessLevel | public |
| contactPoint |
{ "fn": "Charlotte NC", "@type": "vcard:Contact", "hasEmail": "mailto:gisadmins@ci.charlotte.nc.us" } |
| description | A one-hundred-year flood is a flood event that has a 1% probability of occurring in any given year. The 100-year flood is also referred to as the 1% flood, since its annual exceedance probability is 1%,[1] or as having a return period of 100-years. The 100-year flood is generally expressed as a flowrate. Based on the expected 100-year flood flow rate in a given creek, river or surface water system, the flood water level can be mapped as an area of inundation. The resulting floodplain map is referred to as the 100-year floodplain, which may figure very importantly in building permits, environmental regulations, and flood insurance. Flood hazard areas identified on the Flood Insurance Rate Map are identified as a Special Flood Hazard Area (SFHA). SFHA are defined as the area that will be inundated by the flood event having a 1-percent chance of being equaled or exceeded in any given year. The 1-percent annual chance flood is also referred to as the base flood or 100-year flood. |
| distribution |
[ { "@type": "dcat:Distribution", "title": "CSV", "format": "CSV", "accessURL": "https://data.charlottenc.gov/api/download/v1/items/4d477ca0cfd644b79aa9640af705d1cb/csv?layers=0", "mediaType": "text/csv" }, { "@type": "dcat:Distribution", "title": "File Geodatabase", "format": "ZIP", "accessURL": "https://data.charlottenc.gov/api/download/v1/items/4d477ca0cfd644b79aa9640af705d1cb/filegdb?layers=0", "mediaType": "application/zip" }, { "@type": "dcat:Distribution", "title": "GeoJSON", "format": "GeoJSON", "accessURL": "https://data.charlottenc.gov/api/download/v1/items/4d477ca0cfd644b79aa9640af705d1cb/geojson?layers=0", "mediaType": "application/vnd.geo+json" }, { "@type": "dcat:Distribution", "title": "KML", "format": "KML", "accessURL": "https://data.charlottenc.gov/api/download/v1/items/4d477ca0cfd644b79aa9640af705d1cb/kml?layers=0", "mediaType": "application/vnd.google-earth.kml+xml" }, { "@type": "dcat:Distribution", "title": "Shapefile", "format": "ZIP", "accessURL": "https://data.charlottenc.gov/api/download/v1/items/4d477ca0cfd644b79aa9640af705d1cb/shapefile?layers=0", "mediaType": "application/zip" }, { "@type": "dcat:Distribution", "title": "ArcGIS Hub Dataset", "format": "Web Page", "accessURL": "https://data.charlottenc.gov/datasets/charlotte::fema-floodplain-1", "mediaType": "text/html" }, { "@type": "dcat:Distribution", "title": "ArcGIS GeoService", "format": "ArcGIS GeoServices REST API", "accessURL": "https://meckgis.mecklenburgcountync.gov/server/rest/services/FEMAFloodplain/FeatureServer/0", "mediaType": "application/json" } ] |
| identifier | https://www.arcgis.com/home/item.html?id=4d477ca0cfd644b79aa9640af705d1cb&sublayer=0 |
| issued | 2022-01-25T01:27:59.000Z |
| keyword |
[ "100 Year", "Charlotte", "Encroachment", "Environment", "FEMA", "Flood Special Flood Hazard Area", "Floodway", "Mecklenburg County", "North Carolina", "USA" ] |
| landingPage | https://data.charlottenc.gov/datasets/charlotte::fema-floodplain-1 |
| license | https://creativecommons.org/licenses/by/4.0 |
| modified | 2026-09-23T23:53:40.000Z |
| publisher |
{ "name": "City of Charlotte" } |
| spatial | -81.0563,34.9987,-80.5679,35.5197 |
| theme |
[ "geospatial" ] |
| title | FEMA Floodplain |
