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Figure 13.1
The Mid-Atlantic Region; 10 watersheds used in later analysis are highlighted on the map.
Thematic Mapper (TM) images (Vogelmann et al., 1998; Vogelmann et al., 2001). The NLCD was
created by the Multi-Resolution Land Characterization (MRLC) consortium (Loveland and Shaw,
1996) to provide a national-scope and consistently classified LC data set for the country. Method-
ology and results of the accuracy assessment have been described in Stehman et al. (2000), Yang
et al. (2000, 2001), and Zhu et al. (1999, 2000). While data for the accuracy assessment were taken
by federal region and available for several regions, this study only used data collected for Federal
Geographic Region III, the Mid-Atlantic Region (MAR) (Figure 13.1). Table 13.1 shows the number
of photographic interpreted “reference” data samples associated with each class in the LC map
(Level I) for the MAR. Note that the reference data for Region III did not include alternate reference
cover-type labels or information concerning photographic interpretation confidence, unlike data
associated with other federal geographic regions.
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