The legends are also available as metadata on each image. parts of Kenai Peninsula Borough and Anchorage Municipality are available. Developed, open space: 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. The proportion of sagebrush canopy in each 30m pixel. No masking of obvious non-tree areas is performed for this product. Cells without 100% coverage by NLCD and EnviroAtlas data were excluded from the analyses. 22: Developed, Low Intensity- areas with a mixture of … Grassland/herbaceous: areas dominated by gramanoid or herbaceous vegetation, generally greater than 80% of total vegetation. bare ground, litter, sagebrush, big sagebrush and annual herbaceous, along Defines which impervious layer pixels are roads and provides the best fit description for impervious pixels that are not roads. Examples include apartment complexes, row houses and commercial/industrial. USA NLCD Impervious Surface USA NLCD Land Cover 2006 USA NLCD Land Cover 2011 USA NLCD Land Cover Change. Download the per pixel estimates of percent tree canopy legend. Included in NLCD2016. This type is often co-associated with grasses, sedges, herbs, and non-vascular vegetation. The higher the value, the greater the model uncertainty in estimating the canopy value for that cell. Included in NLCD2016. To access this dataset in Earth Engine, please sign up for Earth Engine Included in images NLCD2001, NLCD2006, NLCD2011, and NLCD2016. ... Impervious surfaces account for less than 20% of total cover. images.). Impervious Surface– are mainly artificial surface covered by impenetrable materials (asphalt, concrete, etc.) eight epochs, plus separate images for Alaska, Hawaii, and Puerto Rico in 2001 and 2011. Primary road in urban area : interstates and other major roads. Included in NLCD2016. For the impervious layer, only the New for NLCD 2016 is an impervious surface descriptor layer. Included in NLCD2016. 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. NLCD Legend Land Cover Class Descriptions 23 Developed, Medium Intensity - Includes areas with a mixture of constructed materials and vegetation. Evergreen forest: areas dominated by trees generally greater than 5 meters tall, and greater than 20% of total vegetation cover. Generally, vegetation accounts for less than 15% of total cover. 2018, A New Generation of the United States National Land Cover Database: Requirements, Research Priorities, Design, and Implementation Strategies, p. 108–123. Impervious surfaces account for 80 to100 percent of the total cover. Primary road outside urban area : interstates and other major roads. The change index was designed to assist NLCD users to … 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 … 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. No new imperviousness products for Alaska, Hawaii and Puerto Rico are available from NLCD 2016. … Earth Engine is free to use for research, education, and nonprofit use. urban classes and on a decision-tree classification for the rest. 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. NLCD classes. The 1992 Tertiary road in urban area : any two-lane road. image is not directly comparable to any later editions of NLCD. 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. NLCD Legend … The original land cover map These areas most commonly include single-family housing units. The suite of cell sizes was … 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. Included in images NLCD2011, NLCD2011_AK, NLCD2011_HI, NLCD2011_PR, and NLCD2016. 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. 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. The bare ground proportion in each 30m pixel. Included in NLCD2016. Included in NLCD2011, NLCD2011_AK, NLCD2011_HI, and NLCD2011_PR. Included in NLCD2016. then return to this page. (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. 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 … (MRLC) Consortium, a partnership of federal agencies led by the been produced by USGS in collaboration with the Bureau of Land Management. Included in NLCD2016. All images except NCLD2011_HI and NLCD2011_PR include the landcover classification scheme described in the 2016 Product Legend. 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 … Average height of shrubs. NLCD Code:24 NLCD Class: HIGH INTENSITY DEVELOPED SE Gap Analysis Project - Land Cover Legend 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. Because of challenges in comparing NLCD datasets from these two years, we used spatial data calculated by Fry et al. NLCD 2016 offers 7 integrated epochs of land cover for years 2001, 2003, 2006, 2008, 2011, 2013, and 2016. This class includes true shrubs, young trees in an early successional stage, or trees stunted from environmental conditions. These roads have been separated in the western United States so that a better categorization of developed features is represented in the landcover. The symbology uses a 7-class graduated color ramp with thresholds set according to Schueler et al (2009) Reformulated Impervious Cover Model. NLCD 2016 Shrub Component products characterize the percentage of each The proportion of shrub canopy in each 30m pixel. National Land Cover Data Base (NLCD)– is a 16-classes land cover classification scheme. only have data for parts of Alaska. 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. NLCD 2016 land cover and impervious surface product versions of previous dates must be downloaded for proper comparison. Impervious surfaces account for 80 to100 percent of the total cover. Impervious surfaces account for 20-49 percent of total cover. Island. Tertiary road outside urban area : any two-lane road. 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. Pasture/hay vegetation accounts for greater than 20% of total vegetation. U.S. Geological Survey. Most U.S. Geological Survey (USGS) information resides Download the NLCD2016 land cover classification legend. These areas most commonly include single-family housing units. This class also includes all land being actively tilled. (2011) and Xian et al. Impervious surfaces account for 20-49 percent of total cover. 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. This dataset has one image for the continental US for each of the Standardized land cover is mapped in 20 classes for both 2006 and 2011. NLCD Legend Land Cover Class Descriptions Developed, High Intensity Developed, High Intensity - Includes highly developed areas where people reside or work in high numbers. Included in images NLCD2001, NLCD2001_AK, NLCD2001_HI, NLCD2001_PR, NLCD2006, NLCD2011, NLCD2011_AK, and NLCD2016. 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. Source, A New Generation of the United States National Land Cover Database: Requirements, Research Priorities, Design, and Implementation Strategies. 1992 data are primarily based on unsupervised classification of Landsat data, Impervious Surface Coefficients – percentage of impervious area per land cover class based on National Land Cover Database (NLCD) imperviousness values. 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). Moss: Alaska only areas dominated by mosses, generally greater than 80% of total vegetation. 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. More than 75% of the tree species maintain their leaves all year. Percent of the pixel covered by developed impervious surface. Additional 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). The annual and perennial grass and forb proportion in each 30m pixel. Standard error for the model as a percentage from 0 to 45. Impervious surfaces account for 80% to 100% of the total cover. 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. database spanning 8 epochs (1992, 2001, 2004, 2006, 2008, 2011, 2013 and 2016). This index provides a simple and comprehensive way to visualize change from all 7 dates of land cover in a single layer. Secondary road in urban area : non-interstate highways. 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. Impervious surfaces account for 20% to 49% percent of total cover. Lichens: Alaska only areas dominated by fruticose or foliose lichens generally greater than 80% of total vegetation. 30-meter pixel in the Western United States covered by shrub, herbaceous, NLCD also provides unique products not represented in LCMAP data that may be useful for specific user applications. Impervious surfaces, including paved areas such as roads, parking lots, and sidewalks as well as rooftops, prevent water from draining naturally into the ground. Also included in this release are thematic … 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. Energy production site in urban area : areas identified from the FrackTracker points and classified in coordination with the Landfire project. NLCD (the National Land Cover Database) is a 30-m Landsat-based land cover Canopy is never without green foliage. Neither deciduous nor evergreen species are greater than 75% of total tree cover. 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. information on Acknowledging or Crediting USGS as Information Examples include apartment complexes, row houses, and commercial/industrial. Remote Sensing of Environment, 114, 1676-1686. The proportion of big sagebrush canopy in each 30m pixel. Dwarf scrub: Alaska only areas dominated by shrubs less than 20 centimeters tall with shrub canopy typically greater than 20% of total vegetation. Developed, low intensity: areas with a mixture of constructed materials and vegetation. Examples include apartment complexes, row houses and commercial/industrial. Nonroad impervious surface in urban area. 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, Tree cover is only available on a strip along the coast from the southern The impervious surface data are represented as the percent impervious cover for each unique watershed. Source is available. Impervious surfaces account for less than 20 percent of total cover. (They could not be merged in due to having a different projection from the continental US Impervious surfaces account for 80 to100 percent of the total cover. Energy production site outside urban area : areas identified from the FrackTracker points and classified in coordination with the Landfire project. Points common to all image pairs were used for classification via decision tree, with cross-validation and boosting options. New for NLCD 2016 is an impervious surface descriptor layer. 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. Developed high intensity: highly developed areas where people reside or work in high numbers. These areas most commonly include single-family housing units. The NLCD consistently quantifies the percent anthropogenic TIA for the NLCD at a 30-meter … Shrub/scrub: areas dominated by shrubs less than 5 meters tall with shrub canopy typically greater than 20% of total vegetation. Impervious surface layers (currently provided at nominal 5-year intervals) provide information valuable for hydrologic applications, for example. The classes in the 2016 product legend are given below. 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). Impervious surfaces account for less than 20% of total cover. 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 Developed classes in these years are directly derived from and updated following the impervious surface cycle. NLCD products are created by the Multi-Resolution Land Characteristics Secondary road outside urban area : non-interstate highways. 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. 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 … Impervious surfaces account for 50-79 percent of the total cover. Download the NLCD2016 land cover classification legend. NLCD Legend Land Cover Class Descriptions Developed, High Intensity Developed, High Intensity - Includes highly developed areas where people reside or work in high numbers. Included in NLCD2016. More than 75% of the tree species shed foliage simultaneously in response to seasonal change. Crop vegetation accounts for greater than 20% of total vegetation. Impervious surfaces account for 50% to 79% 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. with estimating shrub height and sagebrush height. Note that the impervious layers and tree cover layers for Alaska 2011 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. The dead plant material proportion in each 30m pixel. 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). Updating the 2001 National Land Cover Database impervious surface products to 2006 using Landsat imagery change detection methods. Included in NLCD2016. These roads have been separated in the western United States so that a better categorization of developed features is represented in the landcover. The USGS acknowledges the support of USGS NLCD 2006 Land Cover … Urban classes were excluded, as they are derived from a separate product, the impervious estimation. 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). 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). 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. These boundings will allow us to calculate statistics relating GOES-16 data to ground parameters (NLCD). These areas are not subject to intensive management such as tilling, but can be utilized for grazing. (Note: These coefficients will be derived as an example in the Tutorial and the process can be repeated for other areas.) Deciduous forest: areas dominated by trees generally greater than 5 meters tall, and greater than 20% of total vegetation cover. 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. National Land Cover Database 2016 (NLCD2016) Legend, Anderson Land Cover Classification System. Mixed forest: areas dominated by trees generally greater than 5 meters tall, and greater than 20% of total vegetation cover. Sedge/herbaceous: Alaska only areas dominated by sedges and forbs, generally greater than 80% of total vegetation. 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. Tree Canopy- is the layer of stems of trees, leaves, branches that cover the ground when viewed from above. 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