scounty2m: County boundaries of the Southern United States at 1:2,000,000 scale

This coverage was identified on the USGS Water Resources NSDI Node site at https://nsdi.usgs.gov. The coverage contains the County boundaries of the continental United States. These boundaries were derived from the Digital Line Graph (DLG) files representing the 1:2,000,000 scale map in the National Atlas of the United States.

The data was then modified by USDA Forest Service Personnel for use in the Southern Forest Resource Assessment and exported to a shapefile.This shapefile is used as a base map for a variety of applications.Metadata was updated 10/6/2009 when data became available through this archive, and again on 2/8/2011 to add a DOI to citation. Data were not altered. Minor metadata updates made on 4/18/2013.

Data were originally made available at https://www.srs.fs.usda.gov/sustain/data/.

Minor metadata updates on 12/20/2016.

本覆盖范围系在https://nsdi.usgs.gov的USGS水资源国家地理空间数据基础设施节点网站上识别。该覆盖范围包含美国大陆各县的边界，这些边界源自代表美国国家大比例尺地图（比例尺为1:2,000,000）的数字线图（DLG）文件。数据随后由美国农业部森林服务人员修改，以用于南方森林资源评估，并导出为shapefile格式。此shapefile被用作多种应用的底图。当数据通过此存档可用时，于2009年10月6日更新了元数据，并在2011年2月8日添加了数字对象标识符（DOI）以供引用。数据未进行任何更改。于2013年4月18日进行了轻微的元数据更新。原始数据可在https://www.srs.fs.usda.gov/sustain/data/获取。于2016年12月20日进行了次要的元数据更新。