{948ad57e-23cd-4c29-81de-15497a296dab} eng; USA utf8 dataset EnviroAtlas Coordinator U.S. Environmental Protection Agency, Office of Research and Development-Sustainable and Healthy Communities Research Program, 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 2025-07-24 ISO 19115 Geographic Information - Metadata ISO 19115:2003/Cor.1:2006(E) EnviroAtlas - 2011 Land Cover, Impervious Surface, and Riparian Land Cover Proportions by County for the Conterminous United States 2019-08-26 publication U.S. EPA Office of Research and Development (ORD) - National Exposure Research Laboratory (NERL) Research Triangle Park NC publisher U.S. Environmental Protection Agency (US EPA) originator This EnviroAtlas dataset represents land cover across a county and in riparian areas for each county in the conterminous United States for use in the Compare my Area tool. These metrics include the percentage of land area that is classified as natural, forest, wetland, agricultural, natural, and developed land cover using the EnviroAtlas hybrid Cropland Data Layer (CDL) - 2011 National Land Cover Dataset (NLCD); the percentage of impervious surface based on the 2011 NLCD Percent Developed Impervious dataset; and the percentage of land area within 45 meters of streams, rivers, and other hydrologically connected waterbodies within each county that is classified as forest (excluding wetlands), forest including woody wetlands, and natural land cover, based on the 2011 CDL-NLCD. 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). This dataset is used in the Compare my Area tool, which provides a summary of landscape characteristics by watershed, county, and state. It is useful for evaluating the potential value of ecosystem services provided by vegetation communities, and the impacts of developed land cover across an area and near waterways and water bodies. 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. completed EnviroAtlas Coordinator U.S. Environmental Protection Agency, Office of Research and Development-Sustainable and Healthy Communities Research Program, 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 asNeeded Ecosystem Environment theme EPA GIS Keyword Thesaurus Ecosystem Services EnviroAtlas Environment Environmental Atlas theme EnviroAtlas Agriculture Ecosystem Services EnviroAtlas Environment Environmental Atlas Human Land Cover Riparian Surface Water Water Wetlands theme User 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 None https://edg.epa.gov/EPA_Data_License.html otherRestrictions 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. otherRestrictions Access Constraints: None PUBLIC https://project-open-data.github.io/schema/#accessLevel Standard Technical Controls eng; USA environment -128.02839229 -65.20336449 22.7348894 51.6773602 2011-01-01 true Entity and Attribute Information Entity and Attribute Overview: This dataset was generated using the ATtILA tool (https://www.epa.gov/enviroatlas/attila-toolbox), an ArcGIS tool for calculating commonly used landscape metrics. The land cover inputs are the 2011 NLCD and the EnviroAtlas 2011 CDL-NLCD, a raster dataset that is a hybrid of the 2011 NLCD (https://www.mrlc.gov/data) and the 2011 CDL (https://www.nass.usda.gov/Research_and_Science/Cropland/SARS1a.php). The stream inputs were derived from the NHDFlowline, NHDWaterbody, and NHDArea shapefiles in the NHDPlus Version 2 datasets (http://www.horizon-systems.com/NHDPlus/NHDPlusV2_home.php). For more information on the metric calculation, please see the ATtILA User's Manual included with the toolbox. A comprehensive list of metric creation steps is included in the Processing Steps. Entity and Attribute Detail Citation: https://www.epa.gov/enviroatlas/enviroatlas-fact-sheets EnviroAtlas Coordinator U.S. Environmental Protection Agency, Office of Research and Development-Sustainable and Healthy Communities Research Program, 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 distributor https://enviroatlas.epa.gov/arcgis/rest/services/Other/CMA_Landscape/MapServer/1 download Download The URL providing direct access to the downloadable dataset. download https://www.epa.gov/enviroatlas/enviroatlas-data ESRI:ArcGIS API The endpoint of a web service to access the dataset (REST endpoint, WMS GetCapabilities URL, or a SOAP WSDL endpoint). webMapService https://www.epa.gov/enviroatlas information Documentation URL for accessing related documents such as data dictionary, technical information about a dataset, developer documentation, etc. information dataset Horizontal Positional Accuracy Report Data were collected using methods that have unknown accuracy (EPA National Geospatial Data Policy [NGDP] Accuracy Tier 10). For more information, please see EPA's NGDP at http://epa.gov/geospatial/policies.html Features represented have not been tested for completeness Features represented have not been tested for completeness Tests for integrity have not been performed. This lineage was generated by the FGDC CSDGM to 19139 transformation Calculated percent impervious for the conterminous United States (CONUS): 2017-09-13T00:00:00 a. Obtained the NLCD 2011 Percent Developed Impervious dataset. 2017-09-13T00:00:00 b. Obtained the Census Tiger boundaries (https://www.census.gov/geo/maps-data/data/tiger-line.html). 2017-09-13T00:00:00 c. Created new raster (IMPV2011_ND) by setting areas in the NLCD2011 Percent Developed Impervious dataset that had "VALUE" = 127 to NODATA. 2017-09-13T00:00:00 d. Created new raster (IMPV2011_NoWater) by setting areas in the IMPV2011_ND to NODATA that correspond to areas classified in the VALUE field as 111 (Open Water) or 112 (Perennial Ice/Snow) in the EnviroAtlas hybrid 2011 Cropland Data Layer (CDL) and NLCD 2011 land cover raster. 2017-09-13T00:00:00 e. The mean percentage impervious within each 12-digit Hydrologic Unit was determined using the Zonal Statistics as Table tool in ArcGIS 10.2.2 for Desktop. NHDPlusV2_WBDSnapshot_EnviroAtlas_CONUS was used as the feature zone data with HUC_12 set as the Zone field. IMPV2011_NoWater was used as the Input value raster. 2017-09-13T00:00:00 f. Added a field to the pIMPRV2011 output table named, Pimprv, and did a field calculation to make the contents of the Pimprv field to equal that of the MEAN field. Deleted MEAN field. 2017-09-13T00:00:00 g. Renamed the field Pimprv to PIMPV. 2017-09-13T00:00:00 Calculated land cover metrics for CONUS: 2018-09-19T00:00:00 a. Obtained the EnviroAtlas hybrid 2011 Cropland Data Layer (CDL) and NLCD 2011 land cover raster 2018-09-19T00:00:00 c. Calculations were done using the Land Cover Proportions tool in the Landscape Characteristics toolset of the ATtILA for ArcGIS toolbox (ATtILA 10_0.tbx, 2/16/2016 version) in ArcGIS. Calculated NINDEX, pFor, pWtl, pDev, pAgr, pAgrp, pAgrc, pFor90, pWtl95, and pdev. Used NHDPlusV2_WBDSnapshot_EnviroAtlas_CONUS as the reporting unit feature and cdl_nlcd as the land cover grid. Used a user-defined land cover scheme for the hybrid CDL-NLCD dataset. 2018-09-19T00:00:00 Calculated land cover metrics for AK and HI. Repeated the steps used for CONUS, but used the Alaska 2011 NLCD and the HI_CCAP_Land_Cover_2005_2011_EnviroAtlasVersion (merged CCAP land cover raster) for Hawaii. 2018-10-03T00:00:00 Calculated riparian buffer metrics: 2018-09-19T00:00:00 a. Obtained the NLCD 2011 USFS Percent Tree Canopy Cartographic raster (TCC) 2018-09-19T00:00:00 c. Obtained the NHDPlusV2 National Hydrography Dataset (NHD). 2018-09-19T00:00:00 d. Processed each NHDFlowline shapefile in the NHD with the strmLine Tool in the AtlasAnalyses Toolbox (a self-created toolbox for the purpose of standardizing analyses for the EnviroAtlas). The strmLine tool selects line segments from the NHDPlus NHDFlowline layer that are defined as FTYPE = Stream/River or Connector or Artificial Path. 2018-09-19T00:00:00 e. Processed each NHDArea and NHDWaterbody layers in the NHD with the strmAreal Tool in the AtlasAnalyses Toolbox (a self-created toolbox for the purpose of standardizing analyses for the EnviroAtlas). The strmAreal tool extracts Reservoir, LakePond, and Ice Mass waterbodies that intersect the previously processed NHD flowlines and merges them with any NHDArea wash, rapids, streamriver, or lock chambers that also intersect the NHDFlowlines. 2018-09-19T00:00:00 f. Processed new stream line and areal shapefiles to correspond to the areal extents of the WBD datasets 2018-09-19T00:00:00 g. Created new raster (CNPY2011_NoWater) by setting areas in the TCC to NODATA that correspond to areas classified in the VALUE field as 0 (no data), 111 (Open Water), or 112 (Perennial Ice/Snow) in the EnviroAtlas hybrid 2011 Cropland Data Layer (CDL) and NLCD 2011 land cover raster 2018-09-19T00:00:00 h. Used the ATtILA for ArcGIS tool (ATtILA 10_0.tbx, 5/26/2016 version) to generate feature coverage of the 45 m buffer zones for each 12-digit HUCs by saving the intermediary products while using the Riparian Land Cover Proportions tool. The intermediate output needed is named, rlcp_Buffer45#, where # is an incremental number that is added to the filename if other rlcp_Buffer# files are found in the geodatabase. 2018-09-19T00:00:00 i. Merged all of the 45 m riparian buffer layers into a single coverage for the entire conterminous US. Named the output, RLCPBuffer45. 2018-09-19T00:00:00 j. The mean percent canopy cover within each 45 meter riparian buffer zone in each 12-digit Hydrologic Unit was determined using the Zonal Statistics as Table tool in ArcGIS 10.2.2 for Desktop. RLCPBuffer45 was used as the feature zone data with HUC_12 set as the Zone field. CNPY2011_NoWater was used as the Input value raster. 2018-09-19T00:00:00 k. Added a field to the R45Canopy2011 table named, R45Canopy, and did a field calculation to make the contents of the R45Canopy field to equal that of the MEAN field. Deleted MEAN field as well as fields for ZONE_CODE, COUNT, and AREA. 2018-09-19T00:00:00 Calculated riparian metrics for Hawaii using the same process that was used for CONUS, but using the NLCD 2011 USFS Percent Tree Canopy Cartographic raster for Hawaii. 2017-11-17T00:00:00 unknown 2029-07-23 This metadata was automatically generated from the FGDC Content Standard for Digital Geospatial Metadata standard (version FGDC-STD-001-1998) using the 2024-02-09T11:11:00 version of the FGDC CSDGM to ISO 19139 transform. EnviroAtlas Coordinator U.S. Environmental Protection Agency, Office of Research and Development-Sustainable and Healthy Communities Research Program, 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