USDA Web Soil Survey

Web Soil Survey是由美国农业部自然资源保护局(NRCS)运营的土壤调查数据库，提供美国超过95%县的土壤地图和数据信息。该数据库是世界上最大的自然资源信息系统，可作为农场、地方和更广泛区域规划的权威数据源，用户可查询特定区域的土壤数据并评估其适用性。

Web Soil Survey is a soil survey database operated by the Natural Resources Conservation Service (NRCS) of the United States Department of Agriculture. It provides soil maps and data for over 95% of counties across the United States. As the world's largest natural resource information system, this database serves as an authoritative data source for farm, local and broader regional planning, enabling users to query soil data of specific areas and evaluate their suitability.