NFIP Community Layer No Overlaps Split

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, Texas 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 personally identifiable information (PII). The Community Layer can be used to tie Community ID numbers (CID) to jurisdiction, tribal, and special land use area boundaries.

The Community Layer can be used as a reference to tie Community ID numbers (CID) to jurisdiction, tribal, and special land use area boundaries. <b>However, as jurisdictions may change over time, this dataset should not be considered authoritative.</b>

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 <b>contains all three versions of the community layer</b>, not just the layer for which this dataset page describes.

Data as of December 2024. No updates are planned at this time.

This layer can also be accessed from the FEMA ArcGIS viewer online: https://fema.maps.arcgis.com/home/item.html?id=4b712b99d43d41cb9328e94891520a63

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. For inquiries about FEMA's data and Open Government program, please email the OpenFEMA team at OpenFEMA@fema.dhs.gov.