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    Author(s): David J. NowakEric J. Greenfield
    Date: 2010
    Source: Environmental Management. 46(3): 378-390.
    Publication Series: Scientific Journal (JRNL)
    Station: Northern Research Station
    PDF: Download Publication  (347.97 KB)


    The 2001 National Land Cover Database (NLCD) provides 30-m resolution estimates of percentage tree canopy and percentage impervious cover for the conterminous United States. Previous estimates that compared NLCD tree canopy and impervious cover estimates with photo-interpreted cover estimates within selected counties and places revealed that NLCD underestimates tree and impervious cover. Based on these previous results, a wall-to-wall comprehensive national analysis was conducted to determine if and how NLCD derived estimates of tree and impervious cover varies from photo-interpreted values across the conterminous United States.

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    Nowak, David J.; Greenfield, Eric J. 2010. Evaluating the national land cover database tree canopy and impervious cover estimates across the conterminous United States: a comparison with photo-interpreted estimates. Environmental Management. 46(3): 378-390.


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    national cover maps, photo-interpretation, tree canopy cover, impervious cover

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