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CUGIR dataset information

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National Land Cover Dataset 1992, New York State
MapsheetNew York State State
ProviderMulti-Resolution Land Characteristics Consortium
FormatGeoTIFF image .tif
Download Download via MRLC
Coordinate System Albers Conical Equal Area | meters
DatumNorth American Datum 1983
Publication date January 01, 1997
Date added or updated May 27, 2008
DescriptionAbstract
These data can be used in a geographic information system (GIS) for anynumber of purposes such as assessing wildlife habitat, water quality, pesticiderunoff, land use change, etc. The State data sets are provided with a 300meter buffer beyond the State border to faciliate combining the State filesinto larger regions.The user must have a firm understanding of how the datasets were compiled andthe resulting limitations of these data. The National Land Cover Dataset wascompiled from Landsat satellite TM imagery (circa 1992) with a spatialresolution of 30 meters and supplemented by various ancillary data (whereavailable). The analysis and interpretation of the satellite imagery wasconducted using very large, sometimes multi-state image mosaics (i.e. up to18 Landsat scenes). Using a relatively small number of aerial photographs for'ground truth', the thematic interpretations were necessarily conducted froma spatially-broad perspective. Furthermore, the accuracy assessments (seebelow) correspond to 'federal regions' which are groupings of contiguousStates. Thus, the reliability of the data is greatest at the State or multi-State level. The statistical accuracy of the data is known only for theregion.Important Caution AdvisoryWith this in mind, users are cautioned to carefully scrutinize the data tosee if they are of sufficient reliability before attempting to use thedataset for larger-scale or local analyses. This evaluation must be maderemembering that the NLCD represents conditions in the early 1990s.The New York portion of the NLCD was created as part of land cover mappingactivities for Federal Region II that includes the states of New York andNew Jersey. The NLCD classification contains 21 different land covercategories with a spatial resolution of 30 meters. The NLCD was producedas a cooperative effort between the U.S. Geological Survey (USGS) and theU.S. Environmental Protection Agency (US EPA) to produce a consistent, landcover data layer for the conterminous U.S. using early 1990s Landsatthematic mapper (TM) data purchased by the Multi-resolution LandCharacterization (MRLC) Consortium. The MRLC Consortium is a partnershipof federal agencies that produce or use land cover data. Partners includethe USGS (National Mapping, Biological Resources, and Water ResourcesDivisions), US EPA, the U.S. Forest Service, and the National Oceanic andAtmospheric Administration.
Purpose
The main objective of this project was to generate a generalizedand nationally consistent land cover data layer for the entireconterminous United States. These data can be used as a layer ina geographic information system (GIS) for any number of purposessuch assessing wildlife habitat, water quality and pesticide runoff,land use change, etc.
Supplemental Information
The land cover data files are provided as a 'Geo-TIFF' or 8 bitbinary files (from FTP site). The land cover data sets are single bandraster images. The X/Y corner coordinates for New York are 1317210/2663820 (projection meters, center of Upper Left pixel).
Topicsenvironment, planning
Use constraintsNone. Acknowledgement of the U.S. Geological Survey would beappreciated in products derived from these data.
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