Curtis V. Price Naomi Nakagaki Kerie J. Hitt Rick M. Clawges 20070401 1.0 vector digital data USGS Digital Data Series 240 Reston, VA U.S. Geological Survey http://water.usgs.gov/lookup/getspatial?ds240_landuse_poly Curtis V. Price Naomi Nakagaki Kerie J. Hitt Rick M. Clawges 20070401 1.0 map U.S. Geological Survey Data Series 240 Reston, VA U.S. Geological Survey USGS form reference: Price, C.V., Nakagaki, N., Hitt, K.J., and Clawges, R.C., 2006, Enhanced Historical Land-Use and Land-Cover Data Sets of the U.S. Geological Survey, U.S. Geological Survey Digital Data Series 240. [digital data set] http://pubs.usgs.gov/ds/2006/240 http://pubs.usgs.gov/ds/2006/240/ This data set depicts land use and land cover from the 1970s and 1980s and has been previously published by the U.S. Geological Survey (USGS) in other file formats. This version has been reformatted to other file formats and includes minor edits applied by the U.S. Environmental Protection Agency (USEPA) and USGS scientists. This data set was developed to meet the needs of the USGS National Water-Quality Assessment (NAWQA) Program. Land-use and land-cover data collected by the U.S. Geological Survey are useful for environmental assessment of land-use patterns with respect to water-quality analysis, growth management, and other types of environmental impact assessment. The data are meant to be normally used by quadrangle, or among adjacent quadrangles where temporally contiguous. The data can be used in any geographic application where intermediate scale land-use data are appropriate and the source land-cover map dates are representative of the time period of interest. This data set is released as part of an enhanced version of previously published USGS land-use and land-cover data, edited to perform attribute and geographic corrections, recast to the North American Horizontal Datum of 1983, and reformatted to the commonly used geospatial data file formats. BACKGROUND The following background information is extracted from: U.S. Geological Survey, 1986, Land use and land cover digital data from 1:250,000- and 1:100,000-scale maps: Data User Guide 4, 25 p. (This document is out of print, but was available online on July 1, 2005 at http://www.vterrain.org/Culture/LULC/Data_Users_Guide_4.html) "The characteristics of the digital cartographic data base for land Use and land cover and associated maps reflect the parameters used in compiling the maps. The Land Use and Land Cover mapping program is designed so that standard topographic maps at a scale of l:250,000 can be used as a base for compilation and reproduction. In a few cases, the U.S. Geological Survey (USGS) has prepared Land Use and Land Cover and associated maps at a scale of 1:100,000 when the 1:100,000-scale topographic map base was available... Land Use and Land Cover maps provide data to be used either by themselves or in combination with the other data sets produced in the program. The basic sources of land use compilation data are NASA high-altitude aerial photographs, and National High-Altitude Photography (NHAP) program photographs, usually at scales smaller than l:60,000. The l:250,000-scale topographic map series is generally used as the base map for the compilation of the Land Use and Land Cover maps and the associated overlays; 1:100,000-scale topographic map bases have been used on rare occasions. Although compilation of Land Use and Land Cover data is performed on a film-positive base usually enlarged to a scale of approximately l:l25,000, the associated overlays are both compiled and digitized at a scale of l:250,000. Land Use and Land Cover data compilation is based upon the classification system and definitions of Level II Land Use and Land Cover [codes, (see below)]... All features are delineated by curved or straight lines that depict the actual boundaries of the areas (polygons) being described. The minimum size of polygons depicting all Urban or Built-up Land (categories 11-17), Water (51-54), Confined Feeding Operations (23), Other Agricultural Land (24), Strip Mines, Quarries, and Gravel Pits (75) and urban Transitional areas (76), is 4 hectares (ha). All other categories of Land Use and Land Cover have a minimum polygon size of 16 ha. (Those sizes also are considered the minimum sizes to which polygons are digitized.) In the Urban or Built-up Land and Water categories, the minimum width of a feature to be shown is 200 m; (that is, if a square with sides 200 m in length is delineated, the area will be 4 ha). Although the minimum-width consideration precludes the delineation of very narrow and very long 4-ha polygons, triangles or other polygons are acceptable if the base of the triangle or minimum width of the polygon is 200 m in length and if the area of the polygon is 4 ha. Exceptions to this specification are limited access highways (14) and all double line rivers (51) on the 1:250,000-scale base which shall have a minimum width of 92 m. For categories other than Urban or Built-up Land and Water, the 16-ha minimum size for delineation requires a minimum-width polygon of 400 m. Line weight for delineating Land Use and Land Cover polygons and for neatlines is 0.l0 mm at the production scale of l:250,000." LAND-USE AND LAND-COVER CODES These data sets represent land use and land cover using an integer value that references the Anderson level II classification system. The first digit represents the level 1 land-use and land-cover code, and the second digit (ones place) represents a subdivision, or level 2 code. The Anderson Level II land use codes used in this data set are listed below: 1 Urban or built-up land 11 Residental 12 Commercial and services 13 Industrial 14 Transportation, communication, utilities 15 Industrial and commercial complexes 16 Mixed urban or built-up land 17 Other urban or built-up land 2 Agricultural land 21 Cropland and pasture 22 Orchards, groves, vineyards, nurseries, and ornamental horticultural 23 Confined feeding operations 24 Other agricultural land 3 Rangeland 31 Herbaceous rangeland 32 Shrub and brush rangeland 33 Mixed rangeland 4 Forest land 41 Deciduous forest land 42 Evergreen forest land 43 Mixed forest land 5 Water 51 Streams and canals 52 Lakes 53 Reservoirs 54 Bays and estuaries 6 Wetland 61 Forested wetland 62 Nonforested wetland 7 Barren land 71 Dry salt flats 72 Beaches 73 Sandy areas not beaches 74 Bare exposed rock 75 Strip mines, quarries, gravel pits 76 Transitional areas 77 Mixed Barren Land 8 Tundra 81 Shrub and brush tundra 82 Herbaceous tundra 83 Bare ground 84 Wet tundra 85 Mixed tundra 9 Perennial snow or ice 91 Perennial snowfields 92 Glaciers PROCESSING DETAILS The U.S. Environmental Protection Agency (USEPA) received the USGS land-use and and land-cover data files from USGS in 9-track ASCII format, one file per quadrangle. Files were loaded onto the hard disk of the computer from tape. The data were then processed with the GIRASARC2 program written in Arc Macro Language (AML), which is part of the ArcInfo Geographic Information System (GIS) software. This program was developed by the USGS to process the data into a consistent ArcInfo format. The GIRASARC2 AML <http://www.epa.gov/ngispgm3/spdata/EPAGIRAS/meta/girasarc2.aml program does the following: -- Converts the USGS data files to polygon coverage format. -- Reconstructs topology, creating line and polygon features. -- Linearly scales the map coordinates to UTM using the registration points listed in the USGS data file, and then modifies the coordinates to Albers Equal Area projection. -- Generates a quadrangle boundary polygon based on the mathematically-determined corners of the map. -- Loads available documentation into a series of companion documentation files with each data set. Another AML program (GIRASNEAT, <http://www.epa.gov/ngispgm3/spdata/EPAGIRAS/meta/girasneat.aml) does the following: --clips the data to the neatline data set. --dissolves polygon boundaries between polygons with the same land use code. --snaps exterior arcs to the arcs of the neatline cover with a tolerance of 40 meters. Data were reviewed visually by the user responsible for executing the GIRASARC2 program. The GIRASARC2 and GIRASNEAT programs were executed in AML to create each quadrangle data set. The processing described above was completed by the USEPA in the early 1990s. In 2001, the USGS National Water-Quality Assessment (NAWQA) Program needed a seamless data base of the conterminous United States, so data sets were further enhanced for use in the Program, as described below. Additional land use and land cover data sets for Hawaii and one map sheet in Alaska were converted using the same AML programs and edited in a similar manner. The Hawaii data sets were joined together into a single data set as they all are documented with the same source date and are more easily handled as a single data file. These data files were then further edited to correct land-use coding errors caused by the misplacement of labels have also been corrected by visual inspection, checking the codes against the original labels in the GIRAS data files and ancillary land-cover data sets. An AML menu-based application was used to assist in this process. In addition to the processing describe above, the data were processed to fill in all gaps between quadrangles so that the data fits together seamlessly. The polygon data were then transformed so that the horizontal coordinate data reference the North American Datum of 1983. (The raw GIRAS-format data and the USEPA version of it is referenced to the North American Datum of 1927.) The geographic data files were also projected into geographic coordinates (decimal degrees of latitude and longitude). Additional polygon data sets that document the land-use and land-cover data sets in a geographic context were created from the USEPA quadrangle index coverages with further editing based on information in the USGS data files posted on the USGS FTP site at the USGS EROS Data Center at: ftp://edcftp.cr.usgs.gov/pub/data/LULC A summary of this effort was published as: Price, C., Naomi, N., Hitt, K., and Clawges, R., 2003, Mining GIRAS: Improving on a national treasure of land use data, _in_ Proceedings of the 2004 ESRI International User Conference, July 7-11, 2003, Environmental Systems Research Institute, Redlands Calif., 11p., available online at http://gis.esri.com/library/userconf/proc03/p0904.pdf DATA FILE DESCRIPTIONS Note that all data sets are referenced to the North American Datum of 1983. 1. tilepoly: Polygons representing each quadrangle tile. 2. src_poly: Polygons representing the extent of source files, with metadata about the source files used for each area. Some land-use files were merged from multiple GIRAS source files, some of which have different source dates. 3. gAABBB: Polygons for each 1:250,000 tile, where "AA" represents the latitude of the lower right corner and "BBB" represents the longitude of the lower right corner of the map tile. These tile names are referenced in the polygon attributes of the tilepoly and src_poly polygon data sets described above. The polygon data sets above are distributed as a collection of related files that make up the publicly documented ESRI shapefile format: filename.shp ESRI shapefile geographic data file filename.shx ESRI shapefile index data file filename.dbf ESRI shapefile attribute file filename.prj "Well-Known-Text" (WTK) format projection file filename.shp..xml metadata file The shapefiles use geographic (decimal degree) coordinate data referenced to the North American Datum of 1983. 4. girasX Raster-format data, stored in six image files, in GeoTIFF format (with georeferencing included in the internal image header file). IMAGE XMIN YMIN XMAX YMAX DESCRIPTION giras1 -2380005 1874985 15 3200000 NW Conterminous US (Albers) giras2 15 1874985 2300000 3172005 NE Conterminous US (Albers) giras3 -2380005 199995 15 1874985 SW Conterminous US (Albers) giras4 15 199995 2300000 1874985 SE Conterminous US (Albers) giras5 369285 2081265 955575 2460585 Hawaii (UTM Zone 4) giras6 499875 6762705 662145 6877755 Valdez, Alaska (UTM Zone 6) The raster data sets are referenced to locations specified in projected coordinates (in meters). Image tiles giras1 through giras4 use standard parameters for the conterminous United States: Projection ALBERS Datum NAD83 Units METERS Spheroid GRS1980 Xshift 0.0000000000 Yshift 0.0000000000 Parameters 29 30 0.000 /* 1st standard parallel 45 30 0.000 /* 2nd standard parallel -96 0 0.000 /* central meridian 23 0 0.000 /* latitude of projection's origin 0.00000 /* false easting (meters) 0.00000 /* false northing (meters) giras5 (Hawaii) uses these projection parameters: Projection UTM Zone 6 Datum NAD83 Units METERS Spheroid GRS1980 giras6 (Valdez, Alaska) uses these projection parameters: Projection UTM Zone 4 Datum NAD83 Units METERS Spheroid GRS1980 The raster data sets are distributed as a collection of related files: girasX.tif Tagged-Image Format File (TIFF) with GeoTIFF georeferencing girasX.tfw ESRI "World file", used for georeferencing girasX.aux ESRI "aux file" file used by ArcGIS software girasX.prj ESRI ArcInfo projection file girasX.tif.xml metadata file DISCLAIMERS The use of trade, product, or firm names is for descriptive purposes only and does not imply endorsement by the U.S. Government. Although this Federal Geographic Data Committee-compliant metadata file is intended to document the data set in nonproprietary form, as well as in ArcInfo format, this metadata file may include some ArcInfo-specific terminology. Although these data have been used by the U.S. Geological Survey, U.S. Department of the Interior, no warranty expressed or implied is made by the U.S. Geological Survey as to the accuracy of the data. 1970 1985 publication date Complete None planned -160.5000 -66.0000 50.0000 18.750 None land landuse landcover GIRAS LULC digital geographic inlandWaters None United States USA none Not for use at scales greater than 1:250,000. Please note the data set depicts historical land use and is not suitable for applications requiring current land use information. U.S. Geological Survey Ask USGS -- Water Webserver Team mailing address

445 National Center

Reston VA 20192 USA 1-888-275-8747 (1-888-ASK-USGS) http://water.usgs.gov/user_feedback_form.html http://water.usgs.gov/GIS/browse/ds240_landuse_poly.png Illustration of the data set. PNG None Unclassified None Microsoft Windows XP Version 5.1 (Build 2600) Service Pack 2; ESRI ArcCatalog 9.0.0.535 James R. Anderson Ernest E. Hardy John T. Roach Richard E. Witmer 1976 Reston, Virginia U.S. Geological Survey http://pubs.er.usgs.gov/pubs/pp/pp964 U.S. Geological Survey 1990 Reston, Virginia U.S. Geological Survey http://eros.usgs.gov/#Find_Data/Products_and_Data_Available/LULC http://landcover.usgs.gov http://www.vterrain.org/Culture/LULC/Data_Users_Guide_4.html U.S. Environmental Protection Agency 1994 vector digital data Washington, DC, USA U.S. Environmental Protection Agency http://www.epa.gov/waterscience/basins/metadata/giras.htm Polygon consistency checked in ArcInfo. (No overlaps or seams present.) Visually checked against land use and land cover data sets. U.S. Geological Survey 1990 Reston, Virginia U.S. Geological Survey http://landcover.usgs.gov 250000 digital data 1970 1985 ground condition (air photographs collected c. 1970-1985) giras polygon geography and attributes The data was reformatted from the USGS published information to ArcInfo coverage format, edited and polygon topology built, followed by conversion to ArcInfo EXPORT format. See Supplemental_Information element of this metadata record more details. 20030101 Edward Partington U.S. Environmental Protection Agency Computer Specialist mailing and physical address

401 M St SW

Washington DC 20460 USA (202) 260-3106 (202) 401-8390 partington.ed@epamail.epa.gov email or phone The ArcInfo EXPORT format data sets were retrieved from the EPA server, and edited by USGS to to correct minor attribute and geography errors, followed by coordinate projection and data format translation. The final data set is seamless and very closely match together at quad boundaries (although exact edgematching processing was not done, only tiny gaps exist between quadrangle tiles). The quadrangles from Alaska and Hawaii were not available from EPA's collection of EXPORT files. They were downloaded from the USGS EROS ftp site at ftp://edcftp.cr.usgs.gov/pub/data/LULC. The GIRAS format files were converted to ArcInfo Coverage format. The Hawaii files were into a single data ArcInfo coverage, which was was given the tile label G18154. This work was completed by Curtis Price, Naomi Nakagaki, Kerie Hitt, and Rick Clawges in support of the USGS National Water-Quality Assessment Program. A description of this process has been published in Price, C., Naomi, N., Hitt, K., and Clawges, R., 2003, Mining GIRAS: Improving on a national treasure of land use data, in Proceedings of the 2004 ESRI International User Conference, Environmental Systems Research Institute, Redlands Calif. [on-line] (Accessed November 3, 2004, from http://gis.esri.com/library/userconf/proc03/p0904.pdf) See the Supplemental Information element of this metadata record for more details. 20030101 U.S. Geological Survey Ask USGS -- Water Webserver Team mailing address

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Reston VA 20192 USA 1-888-275-8747 (1-888-ASK-USGS) http://water.usgs.gov/user_feedback_form.html 0.000001 0.000001 Decimal degrees North American Datum of 1983 Geodetic Reference System 80 6378137.000000 298.257222 "name".dbf where "name" a geographic identifier of the form "GAABBB", where "AA" is that latitude and "BB" is the longitude of the lower right corner of the tile covered by the data set. ESRI shapefile feature attribute table GIRAS digital data LUCODE Land use classification code number GIRAS Anderson Level 2 land use classification codes (integers 11-92) Anderson, J.R., Hardy, E.E., Roach J.T., and Witmer R.E., 1976. A Land Use and Land Cover Classification System for Use with Remote Sensor Data. USGS Professional Paper 964, U.S. Geological Survey, Reston, VA. Also see: http://landcover.usgs.gov LANDUSE Land use and land cover class description GIRAS Anderson Level 2 land use classification descriptions (text) Anderson, J.R., Hardy, E.E., Roach J.T., and Witmer R.E., 1976. A Land Use and Land Cover Classification System for Use with Remote Sensor Data. USGS Professional Paper 964, U.S. Geological Survey, Reston, VA. Also see: http://landcover.usgs.gov U.S. Geological Survey Ask USGS -- Water Webserver Team mailing address

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Reston VA 20192 USA 1-888-275-8747 (1-888-ASK-USGS) http://water.usgs.gov/user_feedback_form.html Downloadable Data Although this data set has been used by the U.S. Geological Survey, U.S. Department of the Interior, no warranty expressed or implied is made by the U.S. Geological Survey as to the accuracy of the data and related materials. The act of distribution shall not constitute any such warranty, and no responsibility is assumed by the U.S. Geological Survey in the use of this data, software, or related materials. Any use of trade, product, or firm names is for descriptive purposes only and does not imply endorsement by the U.S. Government. Although this Federal Geographic Data Committee-compliant metadata file is intended to document the data set in nonproprietary form, this metadata file may include some vendor-specific terminology. Download index Web page to extract files from an image map. HTML 5 KB http://water.usgs.gov/GIS/dsdl/ds240/index.html None. This data set is provided by USGS as a public service. 20070401 U.S. Geological Survey Ask USGS -- Water Webserver Team mailing address

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Reston VA 20192 USA 1-888-275-8747 (1-888-ASK-USGS) http://answers.usgs.gov/cgi-bin/gsanswers?pemail=h2oteam&subject=GIS+Data+Set+ds240_landuse_poly FGDC Content Standards for Digital Geospatial Metadata FGDC-STD-001-1998