rive impervious surface coefficients per NLCD 92 class in por-tions of the Mid-Atlantic physiographic region. These roads have been separated in the western United States so that a better categorization of developed features is represented in the landcover. 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). These areas most commonly include single-family housing units. The USGS acknowledges the support of USGS NLCD 2006 Land Cover … Included in images NLCD2001, NLCD2001_AK, NLCD2001_HI, NLCD2001_PR, NLCD2006, NLCD2011, NLCD2011_AK, and NLCD2016. Included in NLCD2016. tip of the Alaskan Panhandle up through the Kenai Peninsula, plus Kodiak 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. Included in images NLCD2011, NLCD2011_AK, NLCD2011_HI, NLCD2011_PR, and NLCD2016. Included in NLCD2016. with estimating shrub height and sagebrush height. 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. Average height of shrubs. Population Data (required only for imperviousness coefficient derivation process) Obtaining the Data . The legends are also available as metadata on each image. Open water: areas of open water, generally with less than 25% cover of vegetation or soil. More than 75% of the tree species shed foliage simultaneously in response to seasonal change. Remote Sensing of Environment, 114, 1676-1686. Shrub/scrub: areas dominated by shrubs less than 5 meters tall with shrub canopy typically greater than 20% of total vegetation. 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). Developed, open space: areas with a mixture of some constructed materials, but mostly vegetation in the form of lawn grasses. These boundings will allow us to calculate statistics relating GOES-16 data to ground parameters (NLCD). Tertiary road outside urban area : any two-lane road. 30-meter pixel in the Western United States covered by shrub, herbaceous, 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. (MRLC) Consortium, a partnership of federal agencies led by the 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. No masking of obvious non-tree areas is performed for this product. This index provides a simple and comprehensive way to visualize change from all 7 dates of land cover in a single layer. NLCD Legend Land Cover Class Descriptions 22 Developed, Low 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. These products have 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. eight epochs, plus separate images for Alaska, Hawaii, and Puerto Rico in 2001 and 2011. Dwarf scrub: Alaska only areas dominated by shrubs less than 20 centimeters tall with shrub canopy typically greater than 20% 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. Secondary road in urban area : non-interstate highways. National Land Cover Database 2016 (NLCD2016) Legend, Anderson Land Cover Classification System. ... Impervious surfaces account for less than 20% of total cover. The change index was designed to assist NLCD users to … only have data for parts of Alaska. Included in NLCD2016. The impervious surface data are represented as the percent impervious cover for each unique watershed. NLCD also provides unique products not represented in LCMAP data that may be useful for specific user applications. Canopy is never without green foliage. Tree cover is only available on a strip along the coast from the southern Impervious surfaces account for 50% to 79% of the total cover. Developed classes in these years are directly derived from and updated following the impervious surface cycle. Impervious surfaces account for 80 to100 percent of the total cover. 1992 data are primarily based on unsupervised classification of Landsat data, Included in NLCD2016. image is not directly comparable to any later editions of NLCD. Included in images NLCD2001, NLCD2006, NLCD2011, and NLCD2016. The classes in the 2016 product legend are given below. 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. More than 75% of the tree species maintain their leaves all year. NLCD products are created by the Multi-Resolution Land Characteristics This class includes true shrubs, young trees in an early successional stage, or trees stunted from environmental conditions. Percent Canopy Density, Percent Impervious Surface (Salt Lake and Mesa sites) – 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. NLCD Code:24 NLCD Class: HIGH INTENSITY DEVELOPED SE Gap Analysis Project - Land Cover Legend Impervious surfaces account for less than 20% of total cover. 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. Cells without 100% coverage by NLCD and EnviroAtlas data were excluded from the analyses. No new imperviousness products for Alaska, Hawaii and Puerto Rico are available from NLCD 2016. Grassland/herbaceous: areas dominated by gramanoid or herbaceous vegetation, generally greater than 80% of total vegetation. Download the per pixel estimates of percent imperviousness legend. The original land cover map 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). Perennial ice/snow: areas characterized by a perennial cover of ice and/or snow, generally greater than 25% of total cover. Because of challenges in comparing NLCD datasets from these two years, we used spatial data calculated by Fry et al. information on Acknowledging or Crediting USGS as Information 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, been produced by USGS in collaboration with the Bureau of Land Management. 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.) All images except NCLD2011_HI and NLCD2011_PR include the landcover classification scheme described in the 2016 Product Legend. Developed high intensity: highly developed areas where people reside or work in high numbers. NLCD 2016 land cover and impervious surface product versions of previous dates must be downloaded for proper comparison. Developed, medium intensity: areas with a mixture of constructed materials and vegetation. Generally, vegetation accounts for less than 15% of total cover. NLCD Legend … Nonroad impervious surface outside urban area. 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. These areas most commonly include single-family housing units. Lichens: Alaska only areas dominated by fruticose or foliose lichens generally greater than 80% of total vegetation. 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 Crop vegetation accounts for greater than 20% of total vegetation. Included in NLCD2016. The dead plant material proportion in each 30m pixel. Impervious surfaces account for less than 20 percent of total cover. Source is available. USA NLCD Impervious Surface USA NLCD Land Cover 2006 USA NLCD Land Cover 2011 USA NLCD Land Cover Change. Included in NLCD2011, NLCD2011_AK, NLCD2011_HI, and NLCD2011_PR. National Land Cover Data Base (NLCD)– is a 16-classes land cover classification scheme. urban classes and on a decision-tree classification for the rest. 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. Examples include apartment complexes, row houses and commercial/industrial. 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 … 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. This class also includes all land being actively tilled. NLCD Legend Land Cover Class Descriptions Developed, High Intensity Developed, High Intensity - Includes highly developed areas where people reside or work in high numbers. Impervious surfaces account for 80% to 100% of the total cover. while the rest of the images rely on the imperviousness data layer for the The proportion of sagebrush canopy in each 30m pixel. Included in NLCD2016. 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. parts of Kenai Peninsula Borough and Anchorage Municipality are available. Developed, low intensity: areas with a mixture of constructed materials and vegetation. This dataset has one image for the continental US for each of the A new product for NLCD 2016 land cover is the NLCD Land Cover Change Index. Download the NLCD2016 land cover classification legend. Standardized land cover is mapped in 20 classes for both 2006 and 2011. NLCD classes. 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). Download the NLCD2016 land cover classification legend. Deciduous forest: areas dominated by trees generally greater than 5 meters tall, and greater than 20% of total vegetation cover. Impervious surfaces account for 80 to100 percent of the total cover. (2011) for our analysis. 2018, A New Generation of the United States National Land Cover Database: Requirements, Research Priorities, Design, and Implementation Strategies, p. 108–123. Nonroad impervious surface in urban area. Urban classes were excluded, as they are derived from a separate product, the impervious estimation. The suite of cell sizes was … The proportion of big sagebrush canopy in each 30m pixel. Impervious surfaces account for 50-79 percent of the total cover. 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. 4. Included in NLCD2016. Note that the impervious layers and tree cover layers for Alaska 2011 (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. landcover,shrub,shrubland, 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. New for NLCD 2016 is an impervious surface descriptor layer. Sedge/herbaceous: Alaska only areas dominated by sedges and forbs, generally greater than 80% of total vegetation. bare ground, litter, sagebrush, big sagebrush and annual herbaceous, along This is a powerful tool for analyzing the significance of land cover with, for our specific case, land surface temperature (LST). Moss: Alaska only areas dominated by mosses, generally greater than 80% of total vegetation. Mixed forest: areas dominated by trees generally greater than 5 meters tall, and greater than 20% of total vegetation cover. Additional Download the per pixel estimates of percent tree canopy legend. Impervious Surface– are mainly artificial surface covered by impenetrable materials (asphalt, concrete, etc.) For the impervious layer, only the 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. (2011) and Xian et al. The annual only grass and forb proportion in each in 30m pixel. The symbology uses a 7-class graduated color ramp with thresholds set according to Schueler et al (2009) Reformulated Impervious Cover Model. Pasture/hay vegetation accounts for greater than 20% of total vegetation. Updating the 2001 National Land Cover Database impervious surface products to 2006 using Landsat imagery change detection methods. These roads have been separated in the western United States so that a better categorization of developed features is represented in the landcover. The higher the value, the greater the model uncertainty in estimating the canopy value for that cell. 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. 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). Primary road outside urban area : interstates and other major roads. NLCD 2016 offers 7 integrated epochs of land cover for years 2001, 2003, 2006, 2008, 2011, 2013, and 2016. NLCD Legend Land Cover Class Descriptions 23 Developed, Medium Intensity - Includes areas with a mixture of constructed materials and vegetation. images.). 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. Average height of sagebrush. (They could not be merged in due to having a different projection from the continental US The colored rectangles represent the NLCD points contained within each GOES-16 bounded pixel (red circles). Standard error for the model as a percentage from 0 to 45. *To view and print the PDF you must obtain and install the Acrobat® Reader, available at no charge from Adobe Systems. apartment complexes, row houses and commercial/industrial. These areas most commonly include single-family housing units. The bare ground proportion in each 30m pixel. 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