OpenFEMA Dataset: NFIP Community Layer No Overlaps Split - v1
| Key | Value |
|---|---|
| Entity Name | NfipCommunityLayerNoOverlapsSplit |
| API Endpoint | https://www.fema.gov/api/open/v1/NfipCommunityLayerNoOverlapsSplit |
| Update Frequency | R/P1Y |
| Program URL | https://www.fema.gov/flood-insurance |
| Category | National Flood Insurance Program |
| Keywords | nfip community |
Description
This dataset is flattened and multicounty communities are split by county lines. "Flattened" means that there are no overlaps; larger shapes like counties are "punched out" or "clipped" where smaller communities are contained within them. This allows for choropleth shading and other mapping techniques such as calculating unincorporated county land area. Multicounty cities like Houston are split by county lines, allowing easier county summarization and alignment with certain NFIP statistics. This layer is derived from Census, State of Maine, and National Flood Hazard Layer political boundaries.
The Community Layer datasets contain geospatial community boundaries associated with Census and NFIP data. The dataset does not contain personal identifiable information (PII). The Community Layer can be used to tie Community ID numbers (CID) to jurisdiction, tribal, and special land use area boundaries.
A geodatabase (GDB) link is Included in the Full Data section below. The compressed file contains a collection of files that can store, query, and manage both spatial and nonspatial data using software that can read such a file. It contains all of the community layers, not just the layer for which this dataset page describes.
Citation: FEMA's citation requirements for datasets (API usage or file downloads) can be found on the OpenFEMA Terms and Conditions page, Citing Data section: https://www.fema.gov/about/openfema/terms-conditions.
For answers to Frequently Asked Questions (FAQs) about the OpenFEMA program, API, and publicly available datasets, please visit: https://www.fema.gov/about/openfema/faq.
If you have media inquiries about this dataset, please email the FEMA Press Office at FEMA-Press-Office@fema.dhs.gov or call (202) 646-3272. For inquiries about FEMA's data and Open Government program, please email the OpenFEMA team at OpenFEMA@fema.dhs.gov.
Full Data
| Format | Address | Record Count | Approximate File Size |
|---|---|---|---|
| csv | Link to csv | 37920 | large (500MB - 10GB) |
| json | Link to json | 37920 | large (500MB - 10GB) |
| jsona | Link to jsona | 37920 | large (500MB - 10GB) |
| jsonl | Link to jsonl | 37920 | large (500MB - 10GB) |
| parquet | Link to parquet | 37920 | large (500MB - 10GB) |
| gdb | Link to gdb | 37920 | medium (50MB - 500MB) |
Data Fields
| Name | Title | Type | Description | Is Searchable |
|---|---|---|---|---|
| id | Record Identifier |
integer
|
Unique ID assigned to the record | yes |
| communityIdNumber | Community ID (CID) |
text
|
A unique identifier given to all communities in the National Flood Insurance Program (NFIP). It assists in quickly identifying specific communities and associated flood risk information when using FEMA's management systems. | yes |
| stateCode | FIPS State Code |
text
|
FIPS two-digit numeric code used to identify the United States, the District of Columbia, US territories, outlying areas of the US and freely associated states | yes |
| countyCode | FIPS County Code |
text
|
FIPS three-digit numeric code used to identify counties and county equivalents in the United States, the District of Columbia, US territories, outlying areas of the US and freely associated states. Please note that Indian Reservations are not counties and thus will not have a FIPS county code. | yes |
| censusGeoid | Census Geoid |
text
|
Numeric code that uniquely identify all administrative/legal and statistical geographic areas for which the Census Bureau tabulates data. | yes |
| county | County |
text
|
The name of a U.S. county, parish, borough, independent city or other political subdivision of a U.S. state or territory | yes |
| communityName | Community Name |
text
|
Name of the NFIP community, generally, representing the lowest level of government with land use authority. Not every city or town is recognized as its own community with the NFIP. Each state or territory determines land use authority granted to counties/parishes/boroughs, towns/cities, tribal area, etc. within their own jurisdiction | yes |
| communityNameShort | Community Name Short |
text
|
Name stripped of suffix | yes |
| censusYear | Census Year |
smallint
|
The Census Year associated with the data. | yes |
| censusPopulationEntire | Census Population Entire |
integer
|
Census Population derived from blocks: Entire Community | yes |
| censusHousingUnitsEntire | Census Housing Units Entire |
integer
|
Census Housing Units derived from blocks: Entire Community | yes |
| landAreaEntire | Land Area Entire |
float
|
Land area of an entire community in square kilometers. | yes |
| censusPopulationPunched | Census Population Punched |
integer
|
Census Population derived from blocks: Remainder after flattening | yes |
| censusHousingUnitsPunched | Census Housing Units Punched |
integer
|
Census Housing Units derived from blocks: Remainder after flattening | yes |
| landArea2D | Land Area 2D |
float
|
Area of community after flattening in square kilometers. | yes |
| cisType | CIS Type |
text
|
CIS Government Unit (Derived from CIS Name) | yes |
| cisSource | CIS Source |
text
|
Source of CIS data; typically PIVOT | yes |
| geometrySource | Geometry Source |
text
|
Source of geometry | yes |
| alternateGeoid | Alternate Geoid |
text
|
Alternate non-census identifier, such as Maine GIS code | yes |
| alternateName | Alternate Name |
text
|
Alternate non-census name | yes |
| alternateLongName | Alternate Long Name |
text
|
Alternate Long Name | yes |
| layerCreationNotes | Layer Creation Notes |
text
|
Assumptions or tidbits of note in the creation of the layer | yes |
| censusClassCodes | Census Class Codes |
text
|
Census Class codes: https://www.census.gov/library/reference/code-lists/class-codes.html | yes |
| censusFunctionalStatusCodes | Census Functional Status Codes |
text
|
Census Functional status codes: https://www.census.gov/library/reference/code-lists/functional-status-codes.html | yes |
| layerTypeCode | Layer Type Code |
text
|
Includes the following types: Tribe, County, Consolidated City, Statistical Area, SLUA, Place (multi-county), Maine Town/Township, County Subdivision, Place | yes |
See Also
Access the metadata API calls for additional information: