NLCD 1992/2001 Retrofit Land Cover Change ProductEntry ID: nlcd_1992_2001_retrofit
Abstract: Developments in mapping methodology, new sources of input data, and changes in the mapping legend for the 2001 National Land Cover Database (NLCD2001) will confound any direct comparison between NLCD2001 and National Land Cover Dataset 1992 (NLCD1992). Users are cautioned that direct comparison of these two independently created land cover products is not recommended. This NLCD 1992/2001 Retrofit ... Land Cover Change Product was developed to offer users more accurate direct change analysis between the two products.
The NLCD 1992/2001 Retrofit Land Cover Change Product uses a specially developed methodology to provide land cover change information at the Anderson Level I classification scale (Anderson et al., 1976*), relying on decision tree classification of Landsat satellite imagery from circa 1992 and 2001. Unchanged pixels between the two dates are coded with the NLCD01 Anderson Level I class code, while changed pixels are labeled with a "from-to" land cover change value. Additional details about this product are available in the metadata included in the multi-zone downloadable zip file. This product is designed for regional application only and is not recommended for local scales.
Purpose: This NLCD 1992/2001 Retrofit Land Cover Change Product was developed to offer users more accurate direct change analysis between the two products.
Start Date: 1992-01-01Stop Date: 2001-12-31
LAND SURFACE > EROSION/SEDIMENTATION > EROSION
LAND SURFACE > LAND USE/LAND COVER > LAND USE/LAND COVER CLASSIFICATION
LAND SURFACE > LANDSCAPE > REFORESTATION
LAND SURFACE > SOILS
LAND SURFACE > SURFACE RADIATIVE PROPERTIES > ALBEDO
LAND SURFACE > GEOMORPHIC LANDFORMS/PROCESSES
LAND SURFACE > TOPOGRAPHY > TERRAIN ELEVATION
LAND SURFACE > TOPOGRAPHY > TOPOGRAPHIC EFFECTS
LAND SURFACE > TOPOGRAPHY > TERRAIN ELEVATION > TOPOGRAPHICAL RELIEF MAPS
ISO Topic Category
Access Constraints None
Use Constraints There is no guarantee of warranty concerning the accuracy of these data. Users should be aware that temporal changes may have occurred since the data was collected and that some parts of these data may no longer represent actual surface conditions. Users should not use these data for critical applications without a full awareness of their limitations. Acknowledgement of the originating agencies would be appreciated in products derived from these data. Any user who modifies the data set is obligated to describe the types of modifications they perform. User specifically agrees not to misrepresent the data set, nor to imply that changes made were approved or endorsed by the U.S. Geological Survey. Please refer to http://www.usgs.gov/privacy.html for the USGS disclaimer.
Data Set Progress
Distribution Media: Digital
Distribution Format: Download
Role: DIF AUTHOR
Email: lta at usgs.gov
City: Sioux Falls
Province or State: SD
Postal Code: 57198
Extended Metadata Properties
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Creation and Review Dates
DIF Creation Date: 2013-06-20
Last DIF Revision Date: 2013-06-25