65A276A2-6E6E-42A6-82EC-6368D54AAF49 eng utf8 dataset dataset EnviroAtlas Coordinator U.S. Environmental Protection Agency, Office of Research and Development - Center for Public Health and Environmental Assessment (CPHEA), EnviroAtlas Geospatial Data Owner (919) 541-3832 109 T.W. Alexander Drive Research Triangle Park NC 27709 EnviroAtlas@epa.gov https://www.epa.gov/enviroatlas pointOfContact 2025-07-23 ISO 19139 Geographic Information - Metadata - Implementation Specification 2007 2 column 154180 30.000000 row 97509 30.000000 area true false -2361585.000000 252165.000000 -2361585.000000 3177435.000000 2263815.000000 3177435.000000 2263815.000000 252165.000000 -48885.000000 1714800.000000 center 0 EnviroAtlas - 2020 Dasymetric Population for the Conterminous United States v1.1 2022-08-31 publication U.S. Environmental Protection Agency (US EPA) originator U.S. EPA Office of Research and Development (ORD) - Center for Public Health and Environmental Assessment (CPHEA) Research Triangle Park, NC publisher mapDigital This EnviroAtlas dataset intelligently reallocates 2020 population from census blocks to 30 meter pixels based on land cover and land use for the conterminous United States. Datasets for other geographies were produced separately; metadata for these related datasets may be found here: Alaska https://enviroatlas.epa.gov/enviroatlas/MetadataFGDC/Dasymetric_Population_AK_2020_V1.xml, Hawaii https://enviroatlas.epa.gov/enviroatlas/MetadataFGDC/Dasymetric_Population_HI_2020_V1.xml, Puerto Rico https://enviroatlas.epa.gov/enviroatlas/MetadataFGDC/Dasymetric_Population_PR_2020_V1.xml, U.S. Virgin Islands https://enviroatlas.epa.gov/enviroatlas/MetadataFGDC/Dasymetric_Population_VI_2020_V1.xml. 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 United States. The dataset is available as downloadable data (https://www.epa.gov/enviroatlas/forms/enviroatlas-data-download) or as an EnviroAtlas map service. Additional descriptive information about this dataset can be found in its associated EnviroAtlas Fact Sheet (https://www.epa.gov/enviroatlas/enviroatlas-fact-sheets). This dataset is used for metrics that require population to be spatially allocated at a higher resolution than census blocks. This dataset is associated with the journal article (Baynes, J., Neale, A., Hultgren, T. (2022). Improving intelligent dasymetric mapping population density estimates at 30 m resolution for the conterminous United States by excluding uninhabited areas. Earth System Science Data, 14(6), 2833-2849. https://doi.org/10.5194/essd-14-2833-2022). The overall goal of EnviroAtlas is to employ and develop the best available science to map indicators of ecosystem services production, demand, and drivers for the nation. EPA - EnviroAtlas completed EnviroAtlas Coordinator U.S. Environmental Protection Agency, Office of Research and Development - Center for Public Health and Environmental Assessment (CPHEA), EnviroAtlas Geospatial Data Owner (919) 541-3832 109 T.W. Alexander Drive Research Triangle Park NC 27709 EnviroAtlas@epa.gov https://www.epa.gov/enviroatlas publisher asNeeded Alabama Arizona Arkansas California Colorado Connecticut Delaware Florida Georgia Idaho Illinois Indiana Iowa Kansas Kentucky Louisiana Maine Maryland Massachusetts Michigan Minnesota Mississippi Missouri Montana Nebraska Nevada New Hampshire New Jersey New Mexico New York North Carolina North Dakota Ohio Oklahoma Oregon Pennsylvania Rhode Island South Carolina South Dakota Tennessee Texas United States Utah Vermont Virginia Washington Washington DC West Virginia Wisconsin Wyoming place EPA Place Names 2015-01-31 publication Ecology Ecosystem Environment Human Modeling theme EPA GIS Keyword Thesaurus 2007-11-02 publication 020:072 theme Federal Program Inventory 2013-09-16 publication Demographics Ecosystem Services EnviroAtlas Environment theme User 2022-01-03 publication 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. EPA Public Domain License licenseUnrestricted https://edg.epa.gov/EPA_Data_License.html unclassified https://project-open-data.github.io/schema/#accessLevel grid eng utf8 Microsoft Windows 10 Version 10.0 (Build 19042) ; Esri ArcGIS 12.8.3.29751 true -127.977218 -65.254445 22.706881 51.649681 2020-01-01T00:00:00 2020-12-31T00:00:00 Number of people allocated to the pixel image 1 1 Band_1 816.86657714844 0 Unified Code of Units of Measure [arb'U] 32 false false false false false Raster Dataset V1 https://enviroatlas.epa.gov/download/2020_Dasymetric_Population_CONUS_V1_1.zip download download https://enviroatlas.epa.gov/arcgis/rest/services/Rasters/Dasymetric_2020/ImageServer ESRI:ArcGIS offlineAccess https://www.epa.gov/enviroatlas/enviroatlas-data information information https://www.epa.gov/enviroatlas information information https://enviroatlas-epa.hub.arcgis.com/datasets/EPA::2020-dasymetric-population-for-the-conterminous-united-states-alaska-hawaii-puerto-rico-and-the-us-virgin-islands/about information information dataset Tests for integrity have not been performed. EPA National Geospatial Data Policy 2021-08-23 publication Features have been reviewed by U.S. EPA EnviroAtlas Project Managers for public release. true Features represented have not been tested for completeness EPA National Geospatial Data Policy 2021-08-23 publication Features have been reviewed by U.S. EPA EnviroAtlas Project Managers for public release. true Acquired 2019NLCD 2019 Land Cover from MRLC 2021-08-23T00:00:00 National Land Cover Database (NLCD) 2019 Land Cover for the Conterminous United States, 2019 version. NLCD 2019 Land Cover (CONUS) 2021-08-23 publication 2021 Yang, L., Jin, S., Danielson, P., Homer, C., Gass, L., Bender, S. M., Case, A., Costello, C., Dewitz, J., Fry, J., Funk, M., Granneman, B., Liknes, G. C., Rigge, M., and Xian, G.: A new generation of the United States National Land Cover Database: Requirements, research priorities, design, and implementation strategies, ISPRS J. Photogramm., 146, 108–123, https://doi.org/10.1016/j.isprsjprs.2018.09.006, 2018. Acquired 2019NLCD 2019 Impervious Descriptor and National Elevation Dataset (2018; projected to match NLCD). 2019NLCD 2019 pixels that aligned with primary roads and energy production classes from the developed imperviousness descriptor, or a slope of greater than 25 % were reclassified to an uninhabited land cover class (Class 0). This reclassified raster was the ancillary raster for intelligent dasymetric mapping. 2021-08-23T00:00:02 National Land Cover Database (NLCD) 2019 Developed Imperviousness Descriptor for the Conterminous United States, 2019 version. NLCD 2019 Developed Imperviousness Descriptor (CONUS) 2021-08-23 publication 2021 US Geological Survey (USGS) 30 Meter Resolution, One-Sixtieth Degree National Elevation Dataset for CONUS, Alaska, Hawaii, Puerto Rico, and the U. S. Virgin Islands National Elevation Dataset (NED) 2022-06-15 publication The National Elevation Dataset used in this step was mosaicked together for the conterminous US in 2021 by EPA EnviroAtlas staff. Acquired 2020 US Census Blocks with population counts. Projected blocks to match NLCD. Small or irregularly shaped Census Blocks that would not be represented at a 30 m raster were spatially merged with and had their population added to a neighboring block following the methods in Baynes et al. 2022 with an additional step to merge blocks first within their block group when possible, failing that within their census tract. 2021-09-09T00:00:01 US Census Bureau: US Census Bureau: 2020 TIGER/Line Shapefiles 2021-02-02 publication 2021-02-02 Acquired MapLandArea polygons (ESRI StreetMap Premium, 1.0/2021), land use (2021) and points of interest (Open Street Maps, 2021), rail lines (North American Rail Network Rail Lines, 2019), residential parcels (LANDGRID, 2021), and protected areas (USGS Protected Areas Database of the U.S. 2.1). All databases were projected to match NLCD. LANDGRID parcels with attribute "lbcs_activity" equal to 1100 (Household) were maintained regardless of overlap with uninhabited features. All other features described were treated as uninhabited features for intelligent dasymetric mapping. Features from these databases were selected and spatially merged following the methods in Baynes et al. 2022. 2022-08-15T00:00:00 US Geological Survey, Gap Analysis Program: Protected Areas Database of the United States (PAD-US) Protected Areas Database of the United States (PAD-US) 2.1 2020-12-23 publication 2.1 2020-12-23 2021 Regrid residential parcels LANDGRID Parcel 2021-08-23 publication Federal Railroad Administration: North American Rail Lines, Bureau of Transportation Statistics, 2019 North American Rail Network Lines 2019-01-01 publication MapLandArea polygons (ESRI StreetMap Premium, 1.0/2021) ArcGIS StreetMap Premium North America 2021 Release 1 2021-01-01 publication Land use 2021 and Places of interest 2021 from OpenStreetMap contributors: Planet dump, Planet OSM. Land use 2021; Places of interest 2021 2021-08-23 publication Used the EnviroAtlas Dasymetric Toolbox for Open Source GIS (https://github.com/USEPA/Dasymetric-Toolbox-OpenSource) to estimate population density for each CONUS state. Uninhabited Class (0), Water (11), Perennial Ice/Snow (12), and Emergent Wetlands (95) were given preset representative population densities of 0. Washington, D.C. was combined with Maryland and Rhode Island was combined with Massachusetts to ensure adequate samples. 2022-08-16T00:00:00 Mosaic all state results into a single raster. 2022-08-17T00:00:00 asNeeded