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EnviroAtlas - Estimated floodplain map for the Conterminous United States

Metadata Updated: August 30, 2023

Understanding the relationship between flood inundation and floodplains is critical for ecosystem and community health and well-being, as well as targeting floodplain and riparian restoration. Many communities in the United States, particularly those in rural areas, lack inundation maps due to the high cost of flood modeling. Only 60% of the conterminous United States has Flood Insurance Rate Maps (FIRMs) through the U.S. Federal Emergency Management Agency (FEMA). This EnviroAtlas dataset provides an estimate of the 100-year floodplain for the conterminous United States at 30-meter resolution to fill the gaps in the FIRM. The model hit rate for the CONUS was 0.79 compared to the FIRM, indicating that the model captured 79% of the 100-year floodplain identified by FEMA. This product provides complete coverage for the CONUS by identifying floodplains in areas without FIRMs, while also identifying floodplains in tributaries sometimes excluded by FEMA. More information can be found in the journal article (https://doi.org/10.1016/j.scitotenv.2018.07.353). This dataset was produced by the US EPA to support research and online mapping activities related to EnviroAtlas. EnviroAtlas (https://www.epa.gov/enviroatlas) allows the user to interact with a web-based, easy-to-use, mapping application to view and analyze multiple ecosystem services for the contiguous United States. The dataset is available as downloadable data (https://edg.epa.gov/data/Public/ORD/EnviroAtlas) or as an EnviroAtlas map service. Additional descriptive information about each attribute in this dataset can be found in its associated EnviroAtlas Fact Sheet (https://www.epa.gov/enviroatlas/enviroatlas-fact-sheets).

Access & Use Information

License: No license information was provided. If this work was prepared by an officer or employee of the United States government as part of that person's official duties it is considered a U.S. Government Work.

Downloads & Resources

Dates

Metadata Date August 27, 2018
Metadata Created Date August 30, 2023
Metadata Updated Date August 30, 2023
Reference Date(s) August 27, 2018 (publication)
Frequency Of Update NOTPLANNED

Metadata Source

Harvested from Environmental Dataset Gateway ISO Geospatial Metadata

Additional Metadata

Resource Type Dataset
Metadata Date August 27, 2018
Metadata Created Date August 30, 2023
Metadata Updated Date August 30, 2023
Reference Date(s) August 27, 2018 (publication)
Responsible Party U.S. Environmental Protection Agency, Office of Research and Development-Sustainable and Healthy Communities Research Program, EnviroAtlas (Point of Contact)
Contact Email
Guid {4c37f02a-0c91-49b2-b7df-82ea4a6b9750}
Access Constraints Use Constraints: None. Please check sources, scale, accuracy, currency and other available information. Please confirm that you are using the most recent copy of both data and metadata. Acknowledgement of the EPA would be appreciated., Access Constraints: None
Bbox East Long -65.20336449
Bbox North Lat 51.6773602
Bbox South Lat 22.7348894
Bbox West Long -128.02839229
Coupled Resource
Frequency Of Update NOTPLANNED
Harvest Object Id 4d939b2b-dcf3-48b6-842e-d4e56b3719d0
Harvest Source Id 9b3cd81e-5515-4bb7-ad3c-5ae44de9b4bd
Harvest Source Title Environmental Dataset Gateway ISO Geospatial Metadata
Licence https://edg.epa.gov/EPA_Data_License.html
Licence Url https://edg.epa.gov/EPA_Data_License.html
Lineage This lineage was generated by the FGDC CSDGM to 19139 transformation
Metadata Language eng; USA
Metadata Type geospatial
Old Spatial {"type": "Polygon", "coordinates": [[[-128.02839229, 22.7348894], [-65.20336449, 22.7348894], [-65.20336449, 51.6773602], [-128.02839229, 51.6773602], [-128.02839229, 22.7348894]]]}
Progress completed
Spatial Data Service Type
Spatial Reference System
Spatial Harvester True

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