-130.232828-63.67219252.87726421.742308NoneNLCD Reference Data LayerNational Land Cover DatabaseShape*Nominal Identification of Geometry TypeESRINominal, automatically generated.Point_xLongitude of pixel location in decimal degrees.Attribute DescriptionsRealPOINT_YLatitude of pixel location in decimal degrees.Attribute DescriptionsRealStrataNumerical code for assigned stratumEPA121Integer1CONFbianary nominal confidence in reference label assignment (1=confident; 0=not).EPA011Integer1LC2011NLCD Level II land cover label.NLCD1195Integer1LC2016NLCD Level II land cover label.NLCD1195Integer1LC2011L1NLCD Level I land cover label.NLCD1090Integer1LC2016L1NLCD Level I land cover label.NLCD1090Integer1Lpri11L1Level I primary reference label for NLCD 2011 Level INLCD1090Integer1Lalt11L1Level I alternate reference label for NLCD 2011 Level I; alternate reference another map label that would be a suitable choice given the locations context; confidence (CONF) attribute is based on the set of reference labels.NLCD1090Integer1Lpri16L1Level I primary reference label for NLCD 2016 Level INLCD1090Integer1Lalt16L1Level I alternate reference label for NLCD 2016 Level INLCD1090Integer1Lpri11L2Level II primary reference label for NLCD 2011 Level IINLCD1195Integer1Lalt11L2Level II alternate reference label for NLCD 2011 Level II.NLCD1195Integer1Lpri16L2Level II primary reference label for NLCD 2016 Level IINLCD1195Integer1Lalt16L2Level II alternate reference label for NLCD 2016 Level IINLCD1195Integer1yr11Date (year) of Google Earth Imagery used to collect reference label for NLCD 2011; 0 = date not availableTime20042019Integer1mo11Date (month) of Google Earth Imagery used to collect reference label for NLCD 2011; 0 = date not availableTime112Integer1day11Date (day) of Google Earth Imagery used to collect reference label for NLCD 2011; 0 = date not availableTime131Integer1yr16Date (year) of Google Earth Imagery used to collect reference label for NLCD 2016; 0 = date not availableTime20122019Integer1mo16Date (month) of Google Earth Imagery used to collect reference label for NLCD 2016; 0 = date not availableTime112Integer1day16Date (day) of Google Earth Imagery used to collect reference label for NLCD 2016; 0 = date not availableTime131Integer1IncProbInclusion Probability, likelihood of selecting of sample pixel from strataTime0.000000170.00004356Real0.00000001WeightInverse of inclusion probabilityTime22955.93898315947703.7076900Real0.0000001N/AAttribute accuracy is described, where present, with each attribute defined in the Entity and Attribute Section.The U.S. Geological Survey (USGS), in partnership with several federal agencies, has developed and released five National Land Cover Database (NLCD) products over the past two decades: NLCD 1992, 2001, 2006, 2011 and 2016. U.S. EPA leads the accuracy assessment of NLCD land cover products in coordination with USGS and SUNY-ESF. The posted dataset includes map labels and reference labels for 4629 sample locations (pixels) from the NLCD 2016 database. The sample pixels were selected using a stratified random design based on the dual 2011 – 2016 map labels. The data can be used to re-create the accuracy results reported in a forthcoming paper and in support of other applications. Accuracy results are reported for the 2011 and 2016 land cover products in the NLCD2016 database and for selected 2011-2006 changes.U.S. Environmental Protection AgencyNLCD 2016 Land Cover Reference Data, Conterminous United States2020-11-23NoneEPA Place Names2015-01-31https://ofmpub.epa.gov/sor_internet/registry/termreg/searchandretrieve/taxonomies/search.do?search=&searchString=&taxonomyName=WBT%20-%20Geographic%20LocationsWeb Taxonomy - Geographic LocationsUnited StatesUnited StatesFederal Program Inventory2013-09-16https://www.performance.gov/federalprograminventoryFederal Program Inventory020:072020:072EPA GIS Keyword Thesaurus2007-11-02https://www.epa.gov/geospatial/epa-metadata-technical-specificationEPA Metadata Technical SpecificationClimateLandClimateEnvironmentLandUser2020-11-23010digital spatial dataGISImage processingImageryBaseMapEarthCoverLand coverLand Use Land Cover ThemeNational Geospatial Data AssetU.S. Geological Survey (USGS)010digital spatial dataGISImage processingImageryBaseMapEarthCoverLand coverLand Use Land Cover ThemeNational Geospatial Data AssetNGDAU.S. Geological Survey (USGS)PublisherJames WickhamU.S. Environmental Protection Agency, Office of Research and Development, Center for Public Health and Environmental Assessment109 TW Alexander Dr.DurhamNC27709wickham.james@epa.govUS919.541.3077-127.700452-66.10325823.36043451.4219102020-11-25T00:00:00Corner Coordinates (center of pixel, projection meters) Upper Left Corner: -2493045 meters(X), 3310005 meters(Y) Lower Right Corner: -177285 meters(X), 2342655 meters(Y)2020-12-03D83991AF-31B5-4B03-8218-268E70F7D3EBJames WickhamU.S. Environmental Protection Agency, Office of Research and Development, Center for Public Health and Environmental Assessment109 TW Alexander Dr. DurhamNC27709wickham.james@epa.govUS919.541.3077https://edg.epa.gov/EPADataCommons/Public/ORD/EnviroAtlas/NLCD2016RefData.ziphttps://www.mrlc.gov/dataNLCD2016 reference data collection and analysis process: NLCD2016 2011 and 2016 land cover components were combined in a GIS and the duals map labels were used to define a map of 21 strata. Stratum 1 -Water, no change; Stratum 2 - Open urban, no change; Stratum 3 - Low intensity urban, no change; Stratum 4 - Medium intensity urban, no change; Stratum 5 - High intensity urban, no change; Stratum 6 - Barren, no change; Stratum 7 - Deciduous forest, no change; Stratum 8 - Evergreen forest, no change; Stratum 9 - Mixed forest, no change; Stratum 10 - Shrubland, no change; Stratum 11 - Grassland, no change; Stratum 12 - Pasture, no change; Stratum 13 - Cropland, no change; Stratum 14 - Woody wetlands, no change; Stratum 15 - Herbaceous wetlands, no change; Stratum 16 - Catch-all stratum (all 2011─2016 change pixels not in strata 17─21; Stratum 17 - Urban gain, not urban (2011) to urban (2016); Stratum 18 - Forest loss, forest (2011) to not forest (2016) except forest to urban; Stratum 19 - Forest gain; not forest (2011) to forest (2016); Stratum 20 - Agriculture (Ag) loss, Ag (2011) to not Ag (2016) except Ag to forest or urban; Stratum 21 - Ag gain, not Ag (2011) to Ag (2016), except for forest to Ag. The strata map was converted to 21 individual binary maps (e.g., stratum 1; nodata) to generate a random number map of the stratum; pixels with random numbers corresponding to the number of target samples were selected. Selected sample pixels were converted to points for each stratum, and stratum points were then mosaicked into a single map and their order was randomized. Sample points (pixels) were provided to photointerpreters to collect reference data from Google Earth imagery. Reference data collection was conducted by two interpreters who have collected reference data for all previous NLCD accuracy assessments and who have been involved in the production of all previous NLCD databases. Reference data collection was done in a blind format (i.e., collection was done without knowledge of map classification). Reference data collection was also supported by weekly web-enabled conference calls to promote consistency among interpreters and resolve labeling for samples whose interpretation was difficult.1.01500000005000