Web Soil Survey

Web Soil Survey (WSS) provides soil data and information produced by the National Cooperative Soil Survey. It is operated by the USDA Natural Resources Conservation Service (NRCS) and provides access to the largest natural resource information system in the world. NRCS has soil maps and data available online for more than 95 percent of the nation’s counties and anticipates having 100 percent in the near future. The site is updated and maintained online as the single authoritative source of soil survey information.

网络土壤调查（Web Soil Survey，简称WSS）由国家合作土壤调查提供土壤数据和信息。该调查由美国农业部自然资源保护服务局（Natural Resources Conservation Service，简称NRCS）运营，并提供了世界上最大的自然资源信息系统。NRCS已在线上发布了超过全国95%县份的土壤图和数据，并预期在不久的将来实现100%的覆盖。该网站作为土壤调查信息的唯一权威来源，持续在线更新和维护。