USFS Cartographic 2011 Tree Canopy Cover CONUS (Map Service)

The National Land Cover Database 2011 (NLCD2011) percent tree canopy cover (TCC 2011) layer was produced through a cooperative project conducted by the Multi-Resolution Land Characteristics (MRLC) Consortium (www.mrlc.gov). The MRLC Consortium is a partnership of federal agencies, consisting of the U.S. Geological Survey, the National Oceanic and Atmospheric Administration, the U.S. Environmental Protection Agency, the U.S. Department of Agriculture (USDA) National Agricultural Statistics Service, the U.S. Forest Service, the National Park Service, the U.S. Fish and Wildlife Service, the Bureau of Land Management, NASA, and the U.S. Army Corps of Engineers. One of the primary goals of the project was to generate a current, consistent, and seamless national land cover, percent tree canopy cover, and percent impervious cover at medium spatial resolution. TCC 2011 is the NLCD tree canopy cover dataset at medium spatial resolution (30 m). It was produced by the USDA Forest Service Remote Sensing Applications Center (RSAC). The TCC 2011 dataset has two layers: percent tree canopy cover and standard error. For the tree canopy cover layer, the pixel values range from 0 to 100 percent. For the standard error layer, the pixel values range from 0 to 45 percent. The standard error represents the model uncertainty associated with the corresponding pixel in the tree canopy cover layer. The tree canopy cover layer was produced using a Random Forests' regression algorithm and the standard error layer was calculated from the variance of the canopy cover estimates from the random forest regression trees.This record was taken from the USDA Enterprise Data Inventory that feeds into the https://data.gov catalog. Data for this record includes the following resources: ISO-19139 metadata ArcGIS Hub Dataset ArcGIS GeoService For complete information, please visit https://data.gov.

国家土地覆盖数据库2011年（NLCD2011）百分比树冠覆盖率（TCC 2011）层是由多分辨率土地特性联盟（MRLC Consortium，www.mrlc.gov）联合实施的项目所产出。该联盟由联邦机构共同组成，包括美国地质调查局、美国国家海洋和大气管理局、美国环境保护局、美国农业部国家农业统计服务局、美国森林局、国家公园管理局、美国鱼类和野生动物管理局、土地管理局、美国宇航局以及美国陆军工程兵团。该项目的主要目标之一是生成当前、统一且无缝的国家土地覆盖、树冠覆盖率和不透水覆盖率，空间分辨率适中。TCC 2011是国家土地覆盖数据库在中等空间分辨率（30米）下的树冠覆盖率数据集。该数据集由美国农业部森林服务遥感应用中心（RSAC）制作。TCC 2011数据集包含两层：树冠覆盖率百分比和标准误差。在树冠覆盖率层中，像素值范围从0至100%。在标准误差层中，像素值范围从0至45%。标准误差表示与树冠覆盖率层中相应像素相关联的模型不确定性。树冠覆盖率层采用随机森林回归算法制作，而标准误差层则通过随机森林回归树对树冠覆盖率估计的方差进行计算。此记录摘自为https://data.gov目录提供数据的美国农业部企业数据清单。此记录的数据资源包括以下内容：ISO-19139元数据、ArcGIS Hub数据集、ArcGIS GeoService。欲获取完整信息，请访问https://data.gov。