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Scaling-Up Information in Land-Cover Data for Large-Scale Environmental Assessments

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Abstract:The NLCD project provides national-scope land-cover data for the conterminous United States. The first land-cover data set was completed in 2000, and the continuing need for recent land-cover information has motivated continuation of the project to provide current and change information on land cover for regional- to national-scale applications. As with any project, the lessons learned NLCD's first implementation have uncovered new methodological approaches that are anticipated to improve future land-cover products. The majority of these are scaled approaches to land-cover mapping, and include: I ) "smart" scene selection using seasonal (temporal) NDVI to select Landsat TM data; 2) regression-based land-cover "derivatives" ( e.g., impervious surface) for input into the land-cover mapping process and database development; 3) rule-based(e.g., CART) land-cover mapping, and 4) mapping by ecoregion- like mapping zone to improve spectral separation of classes and improve edge-matching. The land-cover data support development of several indicators for regional- to national-scale environmental assessments. Examples of indicators for regional- to national-scale environmental assessments discussed include nitrogen and phosphorus export risk, landscape unit identification and delineation, and change detection.
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Citation:Wickham, J. D. Scaling-Up Information in Land-Cover Data for Large-Scale Environmental Assessments. Presented at Forest-Related Activities and Integrated Assessment Approaches in the European Union and the United States Joint Research Centre, Ispra, Italy, December 10, 2003.
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Contact: Chris Siebert - (702) 798-2234 or siebert.christopher@epa.gov
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Division: Environmental Sciences Division
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Branch: Landscape Ecology Branch
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Product Type: Abstrct/Oral
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Presented: 12/10/2003
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Related Entries:
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Bullet Item Mrlc-Land Cover Mapping, Accuracy Assessment and Application Research
spacer Relationship Reason:   A Project of the Product
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Last Updated on Monday, October 22, 2007
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