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Layer: NLCD 1992 (ID: 91)

Name: NLCD 1992

Display Field:

Type: Raster Layer

Geometry Type: null

Description: The National Land Cover Dataset was compiled from Landsat satellite TM imagery (circa 1992) with a spatial resolution of 30 meters and supplemented by various ancillary data (where available). The analysis and interpretation of the satellite imagery was conducted using very large, sometimes multi-state image mosaics (i.e. up to 18 Landsat scenes). Using a relatively small number of aerial photographs for 'ground truth', the thematic interpretations were necessarily conducted from a spatially-broad perspective. Furthermore, the accuracy assessments (see below) correspond to 'federal regions' which are groupings of contiguous States. 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 the region. Important Caution Advisory With this in mind, users are cautioned to carefully scrutinize the data to see if they are of sufficient reliability before attempting to use the dataset for larger-scale or local analyses. This evaluation must be made remembering that the NLCD represents conditions in the early 1990s. The New York portion of the NLCD was created as part of land cover mapping activities for Federal Region II that includes the states of New York and New Jersey. The NLCD classification contains 21 different land cover categories with a spatial resolution of 30 meters. The NLCD was produced as a cooperative effort between the U.S. Geological Survey (USGS) and the U.S. Environmental Protection Agency (US EPA) to produce a consistent, land cover data layer for the conterminous U.S. using early 1990s Landsat thematic mapper (TM) data purchased by the Multi-resolution Land Characterization (MRLC) Consortium. The MRLC Consortium is a partnership of federal agencies that produce or use land cover data. Partners include the USGS (National Mapping, Biological Resources, and Water Resources Divisions), US EPA, the U.S. Forest Service, and the National Oceanic and Atmospheric Administration. Purpose: The main objective of this project was to generate a generalized and nationally consistent land cover data layer for the entire conterminous United States. These data can be used as a layer in a geographic information system (GIS) for any number of purposes such 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'(on CDROM) or 8 bit binary files (from FTP site). The land cover data sets are single band raster images. The X/Y corner coordinates for New York are 1317210/2663820 (projection meters, center of Upper Left pixel). Mohawk River Watershed Processing: The original files were clipped to the Mohawk watershed. The data was re-projected to UTM 18N, NAD 83.

Definition Expression: N/A

Copyright Text: MRLC

Default Visibility: false

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Supported Query Formats: JSON, AMF

Min Scale: 0

Max Scale: 0

Supports Advanced Queries: false

Supports Statistics: false

Has Labels: false

Can Modify Layer: false

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Use Standardized Queries: true

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HTML Popup Type: esriServerHTMLPopupTypeNone

Type ID Field: null

Fields: None


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