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- Title
Designing a Multi-Objective, Multi-Support Accuracy Assessment of the 2001 National Land Cover Data (NLCD 2001) of the Conterminous United States.
- Authors
Stehman, Stephen V.; Wickham, James D.; Wade, Timothy G.; Smith, Jonathan H.
- Abstract
The database design and diverse application of NLCD 2001 pose significant challenges for accuracy assessment because numerous objectives are of interest, including accuracy of land-cover, percent urban imperviousness, percent tree canopy, land-cover composition, and net change. A multi-support approach is needed because these objectives require spatial units of different sizes for reference data collection and analysis. Determining a sampling design that meets the full suite of desirable objectives for the NLCD 2001 accuracy assessment requires reconciling potentially conflicting design features that arise from targeting the different objectives. Multi-stage cluster sampling provides the general structure to achieve a multi-support assessment, and the flexibility to target different objectives at different stages of the design. We describe the implementation of two-stage cluster sampling for the initial phase of the NLGD 2001 assessment, and identify gaps in existing knowledge where research is needed to allow full implementation of a multi-objective, multi-support assessment.
- Subjects
UNITED States; LAND use; GEOGRAPHICAL research; PHOTOGRAMMETRY; REMOTE sensing; SYSTEMS design
- Publication
Photogrammetric Engineering & Remote Sensing, 2008, p1561
- ISSN
0099-1112
- Publication type
Article
- DOI
10.14358/pers.74.12.1561