Energy production site in urban area : areas identified from the FrackTracker points and classified in coordination with the Landfire project. More than 75% of the tree species maintain their leaves all year. bare ground, litter, sagebrush, big sagebrush and annual herbaceous, along NLCD Legend Land Cover Class Descriptions 23 Developed, Medium Intensity - Includes areas with a mixture of constructed materials and vegetation. These areas are not subject to intensive management such as tilling, but can be utilized for grazing. NLCD (the National Land Cover Database) is a 30-m Landsat-based land cover database spanning 8 epochs (1992, 2001, 2004, 2006, 2008, 2011, 2013 and 2016). database spanning 8 epochs (1992, 2001, 2004, 2006, 2008, 2011, 2013 and 2016). only have data for parts of Alaska. *To view and print the PDF you must obtain and install the Acrobat® Reader, available at no charge from Adobe Systems. The proportion of sagebrush canopy in each 30m pixel. Included in NLCD2016. Examples include apartment complexes, row houses, and commercial/industrial. Points common to all image pairs were used for classification via decision tree, with cross-validation and boosting options. Tree Canopy- is the layer of stems of trees, leaves, branches that cover the ground when viewed from above. 4. The impervious surface data are represented as the percent impervious cover for each unique watershed. The bare ground proportion in each 30m pixel. Pasture/hay: areas of grasses, legumes, or grass-legume mixtures planted for livestock grazing or the production of seed or hay crops, typically on a perennial cycle. The proportion of big sagebrush canopy in each 30m pixel. Standard error for the model as a percentage from 0 to 45. images.). then return to this page. U.S. Geological Survey. Impervious surfaces account for 80 to100 percent of the total cover. rive impervious surface coefficients per NLCD 92 class in por-tions of the Mid-Atlantic physiographic region. A new product for NLCD 2016 land cover is the NLCD Land Cover Change Index. Download the per pixel estimates of percent imperviousness legend. Primary road outside urban area : interstates and other major roads. These boundings will allow us to calculate statistics relating GOES-16 data to ground parameters (NLCD). NLCD Legend … 30-meter pixel in the Western United States covered by shrub, herbaceous, Nonroad impervious surface outside urban area. surface characteristic value tables in the appendices of the AERSURFACE User’s Guide Cultivated crops: areas used for the production of annual crops, such as corn, soybeans, vegetables, tobacco, and cotton, and also perennial woody crops such as orchards and vineyards. Download the per pixel estimates of percent tree canopy legend. The change index was designed to assist NLCD users to … Note that the impervious layers and tree cover layers for Alaska 2011 (They could not be merged in due to having a different projection from the continental US The symbology uses a 7-class graduated color ramp with thresholds set according to Schueler et al (2009) Reformulated Impervious Cover Model. Open water: areas of open water, generally with less than 25% cover of vegetation or soil. To illustrate change in percent impervious surface, zonal statistics were performed on spatial data for the change of impervious surface between the years 2001 and 2006. NLCD 2011 percent developed impervious pixels, identified as changed, were extracted to NLCD developed class codes using NLCD 2011 legend thresholds for developed classes and added to the change pixel map. Nonroad impervious surface in urban area. These areas most commonly include large-lot single-family housing units, parks, golf courses, and vegetation planted in developed settings for recreation, erosion control, or aesthetic purposes. Accuracy assessment of NLCD 2006 land cover and impervious surface James D. Wickham a,⁎, Stephen V. Stehman b, Leila Gass c, Jon Dewitz d, Joyce A. Fry d, Timothy G. Wade a … Tertiary road in urban area : any two-lane road. Included in NLCD2016. NLCD Legend Land Cover Class Descriptions: 21: Developed, Open Space - Includes areas with a mixture of some constructed materials, but mostly vegetation in the form of lawn grasses. Perennial ice/snow: areas characterized by a perennial cover of ice and/or snow, generally greater than 25% of total cover. Download the NLCD2016 land cover classification legend. Sedge/herbaceous: Alaska only areas dominated by sedges and forbs, generally greater than 80% of total vegetation. The higher the value, the greater the model uncertainty in estimating the canopy value for that cell. Included in NLCD2016. NLCD Code:24 NLCD Class: HIGH INTENSITY DEVELOPED SE Gap Analysis Project - Land Cover Legend Also included in this release are thematic … The 1992 NLCD provides spatial reference and descriptive data for characteristics of the land surface such as thematic class (for example, urban, agriculture, and forest), percent impervious surface, and percent tree canopy cover. Included in images NLCD2001, NLCD2001_AK, NLCD2001_HI, NLCD2001_PR, NLCD2006, NLCD2011, NLCD2011_AK, and NLCD2016. These areas most commonly include single-family housing units. This intermediate change pixel product was generalized using the NLCD Smart Eliminate tool with the following minimum mapping units (mmu) applied: 1 acre (approximately 5 … The classification system used by NLCD2016 is modified from the Anderson Land Cover Classification System*. This class includes true shrubs, young trees in an early successional stage, or trees stunted from environmental conditions. developed, cropland, wetland – as well as offering information on tree canopy cover, impervious urban surfaces, a roads and energy development layer, and grass/shrub coverage layers for the Western U.S. Percent of the pixel that's covered by tree canopy. Tree cover is only available on a strip along the coast from the southern No new imperviousness products for Alaska, Hawaii and Puerto Rico are available from NLCD 2016. Tertiary road outside urban area : any two-lane road. Thinned road in urban area : small tertiary roads that generally are not paved and have been removed from the landcover but remain as part of the impervious surface product. This is a powerful tool for analyzing the significance of land cover with, for our specific case, land surface temperature (LST). Defines which impervious layer pixels are roads and provides the best fit description for impervious pixels that are not roads. NLCD Legend Land Cover Class Descriptions Developed, High Intensity Developed, High Intensity - Includes highly developed areas where people reside or work in high numbers. NLCD (the National Land Cover Database) is a 30-m Landsat-based land cover National Land Cover Data Base (NLCD)– is a 16-classes land cover classification scheme. landcover,shrub,shrubland, Impervious Surface– are mainly artificial surface covered by impenetrable materials (asphalt, concrete, etc.) Average height of sagebrush. Included in NLCD2016. New for NLCD 2016 is an impervious surface descriptor layer. Shrub/scrub: areas dominated by shrubs less than 5 meters tall with shrub canopy typically greater than 20% of total vegetation. Developed, open space: areas with a mixture of some constructed materials, but mostly vegetation in the form of lawn grasses. This descriptor layer identifies types of roads, core urban areas, and energy production sites for each impervious pixel to allow deeper analysis of developed features. Accuracy assessment of NLCD 2006 focused on four primary products: 2001 land cover, 2006 land cover, land-cover change between 2001 and 2006, and impervious surface … Dwarf scrub: Alaska only areas dominated by shrubs less than 20 centimeters tall with shrub canopy typically greater than 20% of total vegetation. Additional This class also includes all land being actively tilled. The proportion of shrub canopy in each 30m pixel. Consequently, the actual cell sizes were 1.44 ha (4-x-4 NLCD pixels), 5.76 ha (8-x-8 NLCD pixels), 10.89 ha (11-x-11 NLCD pixels), 32.49 ha (19-x-19 NLCD pixels), 51.84 ha (24-x-24 NLCD pixels), 98.01 ha (33-x-33 NLCD pixels), and 198.81 ha (47-x-47 NLCD pixels). For the impervious layer, only the Examples include apartment complexes, row houses and commercial/industrial. NLCD also provides unique products not represented in LCMAP data that may be useful for specific user applications. NLCD released its most expansive and detailed database to date in mid-2019, sorting each 30-meter plot of ground in the country into a land cover class – e.g. 22: Developed, Low Intensity- areas with a mixture of … NLCD products are created by the Multi-Resolution Land Characteristics No masking of obvious non-tree areas is performed for this product. Impervious surfaces account for 20% to 49% percent of total cover. ... Impervious surfaces account for less than 20% of total cover. This intermediate change pixel product was generalized using the NLCD Smart Eliminate tool with the following minimum mapping units (mmu) applied: 1 acre (approximately 5 … urban classes and on a decision-tree classification for the rest. These roads have been separated in the western United States so that a better categorization of developed features is represented in the landcover. Average height of shrubs. 2018, A New Generation of the United States National Land Cover Database: Requirements, Research Priorities, Design, and Implementation Strategies, p. 108–123. More than 75% of the tree species shed foliage simultaneously in response to seasonal change. The U.S. NLCD impervious surface data set may provide a high-quality nationally consistent land cover data set in a GIS-ready format that can be used to estimate TIA value. 1992 data are primarily based on unsupervised classification of Landsat data, NLCD classes. Impervious surfaces account for 80 to100 percent of the total cover. NLCD 2016 represents the latest evolution of NLCD land cover products focused on providing innovative land cover and land cover change data for the Nation. The colored rectangles represent the NLCD points contained within each GOES-16 bounded pixel (red circles). Impervious surfaces account for less than 20% of total cover. NLCD Legend Land Cover Class Descriptions Developed, High Intensity Developed, High Intensity - Includes highly developed areas where people reside or work in high numbers. Earth Engine is free to use for research, education, and nonprofit use. Percent of the pixel covered by developed impervious surface. Secondary road outside urban area : non-interstate highways. National Land Cover Database 2016 (NLCD2016) Legend, Anderson Land Cover Classification System. Impervious surfaces account for 20-49 percent of total cover. Impervious surfaces account for 50% to 79% of the total cover. With the production and release of NLCD 2006, MRLC has initiated a shift from land-cover mapping to land-cover monitoring (Fry et al., 2011). These areas most commonly include large-lot single-family housing units, parks, golf courses, and vegetation planted in developed settings for recreation, erosion control, or aesthetic purposes. Developed classes in these years are directly derived from and updated following the impervious surface cycle. Primary road in urban area : interstates and other major roads. Download the NLCD2016 land cover classification legend. information on Acknowledging or Crediting USGS as Information in the public domain and may be used without restriction. All images except NCLD2011_HI and NLCD2011_PR include the landcover classification scheme described in the 2016 Product Legend. NLCD 2016 updates all previously released versions of impervious products for CONUS (NLCD 2001, NLCD 2006, NLCD 2011) along with a new date of impervious surface for 2016. The original land cover map Population Data (required only for imperviousness coefficient derivation process) Obtaining the Data . Secondary road in urban area : non-interstate highways. USA NLCD Impervious Surface USA NLCD Land Cover 2006 USA NLCD Land Cover 2011 USA NLCD Land Cover Change. Impervious surfaces account for less than 20 percent of total cover. (MRLC) Consortium, a partnership of federal agencies led by the Developed high intensity: highly developed areas where people reside or work in high numbers. NLCD Legend Land Cover Class Descriptions: 12: Perennial Ice/Snow - All areas characterized by a perennial cover of ice and/or snow, generally greater than 25% of total cover. These areas most commonly include single-family housing units. Examples include apartment complexes, row houses and commercial/industrial. Impervious surfaces account for 50-79 percent of the total cover. Impervious surfaces account for 80% to 100% of the total cover. Updating the 2001 National Land Cover Database impervious surface products to 2006 using Landsat imagery change detection methods. These areas most commonly include single-family housing units. NLCD (the National Land Cover Database) is a 30-m Landsat-based land cover database spanning 8 epochs (1992, 2001, 2004, 2006, 2008, 2011, 2013 and 2016). while the rest of the images rely on the imperviousness data layer for the Impervious Surface Coefficients – percentage of impervious area per land cover class based on National Land Cover Database (NLCD) imperviousness values. The results are many, including an increased burden on stormwater infrastructure, erosion, reduced water quality, 'heat island effects', and both ground-level and water pollution. Remote Sensing of Environment, 114, 1676-1686. with estimating shrub height and sagebrush height. Included in NLCD2016. The suite of cell sizes was … NLCD provides spatial reference and descriptive data for characteristics of the land surface such as thematic class (for example, urban, agriculture, and forest), percent impervious surface, and percent tree canopy cover. This type can occur with significant other grasses or other grass like plants, and includes sedge tundra and sedge tussock tundra. The polygon does not appear to be a “sealed” surface, and therefore its classification as impervious in the reference data could be debated. Yang, L., Jin, S., Danielson, P., Homer, C., Gass, L., Case, A., Costello, C., Dewitz, J., Fry, J., Funk, M., Grannemann, B., Rigge, M. and G. Xian. Included in NLCD2011, NLCD2011_AK, NLCD2011_HI, and NLCD2011_PR. This type is often co-associated with grasses, sedges, herbs, and non-vascular vegetation. To access this dataset in Earth Engine, please sign up for Earth Engine Woody wetlands: areas where forest or shrubland vegetation accounts for greater than 20% of vegetative cover and the soil or substrate is periodically saturated with or covered with water. Barren land (rock/sand/clay): areas of bedrock, desert pavement, scarps, talus, slides, volcanic material, glacial debris, sand dunes, strip mines, gravel pits, and other accumulations of earthen material. NLCD 2016 offers 7 integrated epochs of land cover for years 2001, 2003, 2006, 2008, 2011, 2013, and 2016. Percent Canopy Density, Percent Impervious Surface (Salt Lake and Mesa sites) – The NLCD consistently quantifies the percent anthropogenic TIA for the NLCD at a 30-meter … Deciduous forest: areas dominated by trees generally greater than 5 meters tall, and greater than 20% of total vegetation cover. Neither deciduous nor evergreen species are greater than 75% of total tree cover. Canopy is never without green foliage. Evergreen forest: areas dominated by trees generally greater than 5 meters tall, and greater than 20% of total vegetation cover. The USGS acknowledges the support of USGS NLCD 2006 Land Cover … Included in NLCD2016. parts of Kenai Peninsula Borough and Anchorage Municipality are available. apartment complexes, row houses and commercial/industrial. Impervious surface layers (currently provided at nominal 5-year intervals) provide information valuable for hydrologic applications, for example. In the NLCD land cover data, the 1 ha polygon is subsumed into a tract of cropland that is immediately north and west of it. Mixed forest: areas dominated by trees generally greater than 5 meters tall, and greater than 20% of total vegetation cover. The dead plant material proportion in each 30m pixel. Generally, vegetation accounts for less than 15% of total cover. The annual only grass and forb proportion in each in 30m pixel. New for NLCD 2016 is an impervious surface descriptor layer. The classes in the 2016 product legend are given below. The USA NLCD Land Cover Change layer shows only the land cover that changed type between 2006 and 2011, displaying areas of no change with a transparent symbol. Developed, low intensity: areas with a mixture of constructed materials and vegetation. 1992 data are primarily based on unsupervised classification of Landsat data, while the rest of the images rely on the imperviousness data layer for the ... USGS/NLCD, NLCD 2016 land cover and impervious surface product versions of previous dates must be downloaded for proper comparison. NLCD 2006 in turn has built upon NLCD 2001 by incorporating land-cover and impervious surface change for the continental United States (Fry et al., 2011, Xian et al., 2011). image is not directly comparable to any later editions of NLCD. tip of the Alaskan Panhandle up through the Kenai Peninsula, plus Kodiak These products have eight epochs, plus separate images for Alaska, Hawaii, and Puerto Rico in 2001 and 2011. National Land Cover Dataset: Impervious Surface 2001 The National Land Cover Dataset (NLCD) Impervious Surface 2001 is a raster impervious cover map developed by the U.S. Geological Survey (USGS) for the conterminous United States, southeast Alaska, Hawaii, and Puerto Rico at a spatial resolution of 30 meters. Source is available. NLCD 2006 percent developed impervious pixels, identified as changed, were extracted to NLCD developed class codes using NLCD 2001 legend thresholds for developed classes and added to the change pixel map. This index provides a simple and comprehensive way to visualize change from all 7 dates of land cover in a single layer. (Note: These coefficients will be derived as an example in the Tutorial and the process can be repeated for other areas.) Impervious surfaces account for 80 to100 percent of the total cover. Pasture/hay vegetation accounts for greater than 20% of total vegetation. The annual and perennial grass and forb proportion in each 30m pixel. mrlc,nlcd,usgs,blm, https://developers.google.com/earth-engine/datasets, Ask questions using the google-earth-engine tag, Sign up for the Google Developers newsletter, Acknowledging or Crediting USGS as Information Moss: Alaska only areas dominated by mosses, generally greater than 80% of total vegetation. Urban classes were excluded, as they are derived from a separate product, the impervious estimation. Thinned road outside urban area : small tertiary roads that generally are not paved and have been removed from the landcover but remain as part of the impervious surface product. NLCD Legend Land Cover Class Descriptions 22 Developed, Low Intensity -Includes areas with a mixture of constructed materials and vegetation. These areas most commonly include large-lot single-family housing units, parks, golf courses, and vegetation planted in developed settings for recreation, erosion control, or aesthetic purposes. Grassland/herbaceous: areas dominated by gramanoid or herbaceous vegetation, generally greater than 80% of total vegetation. These areas most commonly include single-family housing units. Developed, medium intensity: areas with a mixture of constructed materials and vegetation. This dataset has one image for the continental US for each of the … (Source: NLCD Legend Land Cover Class Descriptions) Value Definition; 11: Open Water - All areas of open water, generally with less than 25% cover or vegetation or soil 12: Perennial Ice/Snow - All areas characterized by a perennial cover of ice and/or snow, generally greater than 25% of total cover. NLCD 2016 Shrub Component products characterize the percentage of each Impervious surfaces, including paved areas such as roads, parking lots, and sidewalks as well as rooftops, prevent water from draining naturally into the ground. been produced by USGS in collaboration with the Bureau of Land Management. Included in NLCD2016. Included in images NLCD2001, NLCD2006, NLCD2011, and NLCD2016. Most U.S. Geological Survey (USGS) information resides Emergent herbaceous wetlands: areas where perennial herbaceous vegetation accounts for greater than 80% of vegetative cover and the soil or substrate is periodically saturated with or covered with water. Included in NLCD2016. Lichens: Alaska only areas dominated by fruticose or foliose lichens generally greater than 80% of total vegetation. Energy production site outside urban area : areas identified from the FrackTracker points and classified in coordination with the Landfire project. Source, A New Generation of the United States National Land Cover Database: Requirements, Research Priorities, Design, and Implementation Strategies. Included in images NLCD2011, NLCD2011_AK, NLCD2011_HI, NLCD2011_PR, and NLCD2016. The legends are also available as metadata on each image. NLCD 2016 products include 20 classes of land cover for Alaska, as well as a separate product that defines impervious surfaces in urban areas (usually composed of concrete, asphalt, stone, and metal — widely recognized as a key indicator of environmental quality in urban areas). Impervious surfaces account for 20-49 percent of total cover. (2011) and Xian et al. Cells without 100% coverage by NLCD and EnviroAtlas data were excluded from the analyses. These roads have been separated in the western United States so that a better categorization of developed features is represented in the landcover. Included in NLCD2016. Because of challenges in comparing NLCD datasets from these two years, we used spatial data calculated by Fry et al. (2011) for our analysis. Island. Crop vegetation accounts for greater than 20% of total vegetation. Standardized land cover is mapped in 20 classes for both 2006 and 2011.