CountyClassification

A GIS dataset in a generalized Esri Feature Class form representing USA County polygons for high performance rendering. Attributes assigned to each county allow for visual comparison by thematic rendering. This data includes USDA ERS County Typology codes. https://www.ers.usda.gov/data-products/county-typology-codes.aspx. Categorical variables include the rural-urban continuum codes, economic dependence codes, persistent poverty, persistent child poverty, population loss, onshore oil/natural gas counties. Timeframe varies, but is focused on 2015.本数据集为采用通用化Esri要素类（Esri Feature Class）格式构建的地理信息系统（Geographic Information System）数据集，用于呈现美国县级行政区的多边形矢量要素以实现高性能渲染。各县级行政区所附带的属性字段，可支持通过专题制图开展可视化对比分析。本数据集包含美国农业部经济研究服务局（USDA ERS）的县级分类编码，相关说明可参阅：https://www.ers.usda.gov/data-products/county-typology-codes.aspx。其分类变量涵盖城乡连续统编码、经济依赖度编码、持续性贫困、持续性儿童贫困、人口流失以及陆上油气产区县级行政区类别。数据的时间跨度存在差异，但核心聚焦于2015年。