NOTICE: CDIAC as currently configured and hosted by ORNL will cease operations on September 30, 2017. Data will continue to be available through this portal until that time. Data transition plans are being developed with DOE to ensure preservation and availability beyond 2017.

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National Land Cover Data 1992

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This data set is one complete raster coverage of the USGS National Land Cover Data (NLCD). The NLCD is a 21-class, land cover classification of the contiguous United States. It is derived from early to mid-1990s Landsat Thematic Mapper satellite data. A complete description of this data can found at

Please note: the 2001 NLCD data are also available.

The NLCD data is distributed by the USGS EROS Data Center for each U.S. state. The spatial data set distributed here represents the processing of State files into one contiguous raster coverage file for the United States. The single raster coverage is intended for use in spatial analyses for the U.S. Individual State coverages can be downloaded separately from

Download graphic, metadata, and readme file:
Graphic of single file for NLCD1992 (TIFF, 572kb)
Metadata (htm, 15kb or pdf, 21kb)
Readme (txt, 4kb or pdf, 17kb)

Download NLCD92 spatial data:
Spatial data is provided in two formats. Winzip ( or Stuffit ( may be used to open .zip files. Due to the size limitation in earlier versions of these softwares, only Winzip 9.0, Stuffit 8.5, or later versions are recommended to open the zip files distributed here.

1. ESRI ArcInfo Grid. The unzipped files are 4.55GB, and may be read by any Arc product (e.g., ArcView, ArcInfo, ArcGIS). Be sure to unzip files into their respective root directories (i.e., nlcd92 and info directories).
ArcInfo Grid file: (1.70GB)

2. ERDAS Imagine. The unzipped files are 13.9 GB.
Imagine file: (1.19GB)