Attributes for NHDPlus Catchments (Version 1.1) for the Conterminous United States: NLCD 2001 Tree Canopy

This data set represents the mean percentage of tree canopy from the Canopy Layer of the National Land Cover Dataset 2001, (LaMotte and Wieczorek, 2010), compiled for...本数据集代表源自2001年国家土地覆盖数据集（National Land Cover Dataset）冠层（Canopy Layer）的平均树冠覆盖百分比，数据引自LaMotte与Wieczorek（2010），系为……编制而成。