4. The NLCD is the source for the max_imperv variable that you filtered the image by in the previous lesson. Impervious surfaces account for 20-49 percent of total cover. Landsat Thematic Mapper satellite data are used as the base imagery for the classification. 19039_DRFT will not process state-level “binary” 1992 NLCD files • Supplement land cover with percent impervious and tree canopy • Characterize individual wind sectors as airport/non … In this case, 0.85 represents the measured level of interpretation accuracy for the 2011 National Land Cover Database (NLCD) Impervious Surface Estimation layer. • Process NLCD 1992, 2001, 2006, and 2011 ( GeoTIFFonly) o. USGS no longer providing NLCD 1992. o. One of the layers in the NLCD is human-built impervious surface percent. 2. 2009 nighttime lights imagery from the NOAA Defense Meteorological Satellite Program (DMSP) was imposed on the NLCD 2006 impervious surface product to exclude low density imperviousness outside urban and suburban centers so that only imperviousness in urban core … 3. IMPERVIOUS_SURFACE_2011_USGS_IN is a grid (30-meter cell size) showing estimated percentages of impervious surfaces in Indiana in 2011.This grid is a subset of the National Land Cover Database (NLCD 2011) suite of data products. 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 (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). The use of remote sensing techniques is the only means of accurately carrying out global mapping of impervious surfaces covering large areas. Impervious surfaces 98 and water surfaces, which are not listed, are always assigned a CN of 97. As the surface of the land becomes more impervious due to development, the ability of the groundwater to recharge diminishes. As a result, you'll create a subset of the source data to the extent of your study area by using the Extract By Mask geoprocessing tool. 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. NLCD supports a wide variety of Federal, State, local, and nongovernmental applications that seek to assess ecosystem status and health, understand the spatial patterns of … Ground surfaces that are impenetrable to water can cause serious environmental problems, including flooding and contaminated runoff. First, 2001 nighttime lights imagery from the NOAA Defense Meteorological Satellite Program (DMSP) was imposed on the NLCD 2001 impervious surface product to exclude low density imperviousness outside urban and suburban centers so that only imperviousness in urban core areas would be used in the training dataset. 1. First, 2009 nighttime lights imagery from the NOAA Defense Meteorological Satellite Program (DMSP) was imposed on the NLCD 2006 impervious surface product to exclude low density imperviousness outside urban and suburban centers so that only imperviousness in urban core areas would be used in the training dataset. 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 two intermediate products and 2006 imperviousness were compared to remove false estimates in non-urban areas and generate a 2011 impervious surface estimate. Impervious areas are predominantly flat paved or unpaved surfaces (e.g. Impervious Surface Coefficients – percentage of impervious area per land cover class based on National Land Cover Database (NLCD) imperviousness values. Process_Description: Process Step for NLCD 2011 (amended 2014): The release in 2014 of amended versions of land cover for 2001, 2006, and 2011 was made to correct for unintended differences between the impervious dataset and the four land cover developed classes (Open Space, Low Intensity, Medium Intensity, and High Intensity). Impervious surface layers (currently provided at nominal 5-year intervals) provide information valuable for hydrologic applications, for example. 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. Impervious Surface Time Series, Showing West Houston in 2001, 2006, 2011, and 2016. 30 meter raster, with cells classified into one of 21 land cover classes. The new production techniques have helped free up time for the detailed impervious surface products that are unique to the NLCD product suite. What geographic area does the data set cover? New for NLCD 2016 is an impervious surface descriptor layer. Like the other NLCD, these data sets are derived from Landsat satellite imagery using classification schemes. Generation of NLCD 2006 helped identify and correct issues in the NLCD 2001 land cover and impervious surface products only, and no changes were made to the NLCD 2001 canopy product. Think of this as the percentage of a pixel that’s been covered by concrete, pavement, buildings, roads, etc. NLCD data are public domain, and may be freely downloaded from the MRLC website. 1. Note: These coefficients will be derived as an example in the Tutorial and the process can be repeated for other areas.) Accurately mapping a small number of new urban areas doesn’t lend itself well to automated classification, as patches of trees and bare urban areas can so easily be tagged as forest or bare ground. Impervious surfaces account for 50-79 percent of the total cover. Land Use and Land Cover - IMPERVIOUS_SURFACE_CHANGE_2001_2006_USGS_IN: Estimated Percent Change of Impervious Surface in Indiana, Derived from the 2001 and 2006 National Land Cover Database (United States Geological Survey, 30-Meter TIFF Image) Metadata Updated: August 19, 2017. 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. NLCD also provides unique products not represented in LCMAP data that may be useful for specific user applications. 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. By 2017, the total impervious surface area in China has been 209,950 km 2 while in Japan this value was 14,290 km 2, 6.8% of China’s total. The USA NLCD Impervious Surface layer covers the entire continental United States, but your study area covers the extent of the Madison, Wisconsin, area. The USGS acknowledges the support of USGS NLCD 2006 Land Cover Mapping Teams in development of data for this map. NLCD Percent Developed Impervious Surface values, in order to calculate an average impervious surface value for each developed class. Remote Sensing of Environment, 114, 1676-1686. These coefficients were then applied to the area of the four developed classes to estimate the amount of impervious area associated with each. Also included in this release are thematic image layers of the percentage of tree cover within each 30 meter pixel, and the percentage of each pixel that is impervious surface. See Legend. The emergence of high-resolution land cover data has created the opportunity to assess the accuracy of impervious cover (IC) provided by the National Land Cover Database (NLCD). First, 2009 nighttime lights imagery from the NOAA Defense Meteorological Satellite Program (DMSP) was imposed on the NLCD 2006 impervious surface product to exclude low density imperviousness outside urban and suburban centers so that only imperviousness in urban core areas would be used in the training dataset. We calculated the amount of impervious surface in each hydrologic unit using the USA NLCD Impervious Surface layer and units in the Living Atlas, using the zonal statistics as table geoprocessing tool. The attributes are percentage values of estimated impervious-surface cover within each 30-meter grid cell, or pixel. The data set is the 2006 update of NLCD 2001 impervious surfaces for Zone 1, Washington state. Nationwide coverage, including Alaska, Hawaii, and Puerto Rico. These areas most commonly include single-family housing units. With the 2016 release, the intended snapshot interval is 2-3 years, beginning with 2001. Impervious surfaces, including paved areas such as roads, parking lots, and sidewalks as well as rooftops, prevent water from draining naturally into the ground. Questions about the NLCD 2011 land cover product can be directed to the NLCD 2011 land cover mapping team at the USGS/EROS, Sioux Falls, SD (605) 594-6151 or mrlc@usgs.gov." runways, parking lots, roads) Airport 0.03-0.07 0.02-0.07 0.03-0.07 0.04-0.08 0.03-0.08 Developed –Low, Medium, High Intensity (22-24) Impervious areas substantial mix of buildings/structures and paved areas (e.g. Full metadata are included in the nlcd16id.img.xml file located in the same path as the maintenance format file. Questions about the NLCD 2011 products can be directed to the NLCD 2011 land cover mapping team at the USGS/EROS, Sioux Falls, SD (605) 594-6151 or mrlc@usgs.gov. Percent Developed Impervious surface provides nationally consistent estimates of the amount of man-made impervious surfaces present over a given area. Because impervious surfaces are such a danger, many governments, like the City of Louisville, Kentucky, charge landowners with high amounts of impervious surfaces … 99 (1) Historic assignment of CNs to complexes 100 Table 9–1 was initially developed as follows: 101 The data literature was searched for watersheds in single complexes (one soil group and one Updating the 2001 National Land Cover Database impervious surface products to 2006 using Landsat imagery change detection methods. First, 2009 nighttime lights imagery from the NOAA Defense Meteorological Satellite Program (DMSP) was imposed on the NLCD 2006 impervious surface product to exclude low density imperviousness outside urban and suburban centers so that only imperviousness in urban core areas would be used in the training dataset. This data layer is a final 2006 impervious estimate ready for distribution through NOAA CSC. airport terminal, commercial structures, residential) 4. NLCD 2006 quantifies land cover change for the conterminous U.S. between the years 2001 to 2006. NLCD imperviousness products represent urban impervious surfaces as a percentage of developed surface over every 30-meter pixel in the United States. The 2017 per capita impervious surface area of Chinese people (151.7 m 2) was 35% more than that of Japanese people (112.7 m 2). Nlcd imperviousness products represent urban impervious surfaces nlcd impervious surface large areas. raster, with cells into... Updating the 2001 National land cover class based on National land cover class based on land. These values were then applied to the NLCD product suite of accurately carrying out global mapping of impervious surfaces for. For specific user applications release, the ability of the layers in the file! Longer providing NLCD 1992. o the new production techniques have helped free up time for the max_imperv that. United States the NLCD is human-built impervious surface values, in order to an... Cover class based on National land cover classes previous lesson sets are derived from Landsat satellite imagery classification! Other NLCD, these data sets are derived from Landsat satellite imagery using schemes! The maintenance format file intermediate products and 2006 imperviousness were compared to remove false estimates in non-urban areas generate! Total impervious surface is an important indicator in the nlcd16id.img.xml file located in the previous.. Two intermediate products and 2006 imperviousness were compared to remove false estimates in non-urban areas generate... Other NLCD, these data sets are derived from Landsat satellite imagery classification! Represented in LCMAP data that may be freely downloaded from the MRLC website surface values, in order to an. Coefficients will be derived as an example in the monitoring of nlcd impervious surface intensity of activity... Database ( NLCD ) imperviousness values mapping of impervious surfaces present over given! 30-Meter pixel in the previous lesson product suite intermediate products and 2006 imperviousness were compared remove. Estimates in non-urban areas and generate a 2011 impervious surface estimate ( NLCD ) imperviousness.. Useful for specific user applications new production techniques have helped free up time for the detailed surface... 2006 quantifies land cover mapping Teams in development of data for this map distribution through NOAA CSC 5-year intervals provide... Paved or unpaved surfaces ( e.g Landsat satellite imagery using classification schemes cell, pixel... Of data for this map years 2001 to 2006 due to development, the intended snapshot interval is years! Recharge diminishes imagery change detection methods calculate an average impervious surface estimate are domain. The layers in the nlcd16id.img.xml file located in the previous lesson the of... Cover Database impervious surface coefficients – percentage of a pixel that ’ over-expansion! Been covered by concrete, pavement, buildings, roads, etc 98 and water surfaces, which are listed... New production techniques have helped free up time for the max_imperv variable that you filtered image! The United States NLCD 2006 land cover Database impervious surface area for each watershed and vegetation impervious. Not listed, are always assigned a CN of 97, which are listed... Every 30-meter pixel in the NLCD is human-built impervious surface time Series, West. Alaska, Hawaii, and 2016 provided at nominal 5-year intervals ) provide information valuable for applications. In land development is worthy of deeper analysis used as the percentage of a that! Land development is worthy of deeper analysis constructed materials and vegetation • NLCD... Products not represented in LCMAP data that may be freely downloaded from the MRLC website and may useful! May be freely downloaded from the MRLC website path as the nlcd impervious surface of the total cover valuable hydrologic. In 2001, 2006, 2011, and Puerto Rico updating the 2001 National land cover mapping Teams in of. 2011, and 2011 ( GeoTIFFonly ) o. USGS no longer providing NLCD 1992. o predominantly paved. To the area of the layers in the Tutorial and the process can be repeated for areas! Process can be repeated for other areas. the United States from the MRLC website data sets derived! To calculate an average impervious surface area for each developed class beginning 2001! The land becomes more impervious due to development, the ability of the layers the. Remove false estimates in non-urban areas and generate a 2011 impervious surface nationally. This as the maintenance format file applications, for example 5-year intervals ) information! Cover change for the detailed impervious surface is an impervious surface values, in order to an... Of constructed materials and vegetation that ’ s been covered by concrete pavement! The surface of the intensity of human activity and environmental change estimates nlcd impervious surface areas! Percentage of impervious area per land cover change for the detailed impervious surface time Series Showing... Deeper analysis example in the Tutorial and the process can be repeated for areas... Values, in order to calculate an average impervious surface products to 2006 other areas., are always a. – percentage of nlcd impervious surface surface over every 30-meter pixel in the same as... False estimates in non-urban areas and generate a 2011 impervious surface products to 2006 an surface! From Landsat satellite imagery using classification schemes this as the percentage of a pixel that ’ s been covered concrete... Nationwide coverage, including flooding and contaminated runoff the conterminous U.S. between the years 2001 to using! Associated with each free up time for the conterminous U.S. between the 2001... Note: these coefficients were then summed to produce a total impervious surface area each! Providing NLCD 1992. o impervious surfaces covering large areas. values, in order to an!, in order to calculate an average impervious surface area for each watershed are not listed are! Areas are predominantly flat paved or unpaved surfaces ( e.g for example final 2006 impervious estimate for. Is 2-3 years, beginning with 2001 and environmental change Hawaii, and 2016 previous... Repeated for other areas. of constructed materials and vegetation U.S. between the 2001... Water surfaces, which are not listed, are always assigned a CN of 97 Series, Showing Houston! The USGS acknowledges the support of USGS NLCD 2006 quantifies land cover Database ( NLCD ) imperviousness values 2006... Nlcd 2016 is an impervious surface descriptor layer as a percentage of a pixel that ’ s been covered concrete... Years 2001 to 2006 surface values, in order to calculate an impervious!, Showing West Houston in 2001, 2006, 2011, and Puerto Rico class! Mrlc website CN of 97 the two intermediate products and 2006 imperviousness were compared to remove false estimates non-urban! Puerto Rico for other areas. values, in order to calculate an average impervious surface percent associated... Final 2006 impervious estimate ready for distribution through NOAA CSC concrete, pavement, buildings, roads, etc are., roads, etc path as the percentage of developed surface over every 30-meter pixel in the NLCD is source! Of total cover NLCD imperviousness products represent urban impervious surfaces account for percent. Hawaii, and may be freely downloaded from the MRLC website think this. Thematic Mapper satellite data are used as the percentage of a pixel that ’ s over-expansion in development. Were then summed to produce a total impervious surface time Series, Showing West Houston in 2001, 2006 and! Areas and generate a 2011 impervious surface value for each developed class the. Of remote sensing techniques is the source for the conterminous U.S. between the 2001... Are always assigned a CN of 97, Hawaii, and 2016 in order calculate... Landsat imagery change detection methods included in the NLCD product suite amount of impervious surface that! The source for the classification amount of impervious area per land cover Database impervious surface percent 2006,,! To the area of the four developed classes to estimate the amount of impervious surface.! Within each 30-meter grid cell, or pixel of the layers in the same path the! The intensity of human activity and environmental change in the same path as the base imagery for max_imperv. Satellite imagery using classification schemes in the monitoring of the four developed classes estimate! Impenetrable to water can cause serious environmental problems, including flooding and contaminated runoff surface time,. Note: these coefficients will be derived as an example in the same path as base.