VT Data - Onsite Sewage Disposal Soil Ratings

(Link to Metadata) ONSITE is a pre-selected subset of SSURGO certified soil data depicting onsite sewage disposal ratings of Vermont soils. The NRCS Top20 table was joined to SSURGO polygons. The joined data set was then DISSOLVED on the ONSITE attribute in order to merge polygons with the same ONSITE classification code. VCGI HAS NOT PERFORMED QAQC ON THE RESULTS. AS A RESULT, THIS DATASET SHOULD BE USED WITH CAUTION. NOTICE: This information identifies the new onsite sewage disposal class. This new system replaces the old classification system. Ratings are based on Vermont Environmental Protection Rules, August 16, 2002, based on 20% maximum slope - for lots created on or after June 14, 2002. It doesn't replace onsite investigation. These are the five major classes. Class I - WELL SUITED Class II - MODERATELY SUITED Class III - MARGINALLY SUITED Class IV - NOT SUITED Class V - NOT RATED Refer to documentation bundled with the SOILATTR product--AKA VT DATA - NRCS TOP20 SOILS ATTRIBUTES AND DOCUMENTATION (which is a stand-alone item in Vermont Open Geodata Portal); SOILATTR can be directly downloaded via https://drive.google.com/uc?export=download&id=13a68oimr0sVu_D4jXrNKAMNBIbVE9GN7 . Survey Dates - https://www.nrcs.usda.gov/wps/portal/nrcs/surveylist/soils/survey/state/?stateId=VT（元数据链接）ONSITE为经SSURGO认证的土壤数据预选子集，用于呈现佛蒙特州土壤的现场污水处理处置分级。本数据集将美国自然资源保护服务局（NRCS）Top20表与SSURGO多边形要素进行属性连接，随后按ONSITE属性字段对连接后的数据集执行融合操作，以合并具有相同ONSITE分类代码的多边形要素。佛蒙特州地理信息中心（VCGI）未对本数据集的最终结果开展质量保证与质量控制（QAQC）工作，因此使用本数据集时请务必谨慎。 注意：本信息明确了全新的现场污水处理处置分级体系，该体系取代了旧有的分类系统。其分级标准依据2002年8月16日发布的《佛蒙特州环境保护规则》，针对2002年6月14日及之后获批的地块，采用最大坡度20%的判定准则。本分级体系并不替代现场勘察工作。本数据集共包含五大主要分级： Class I - 极适配（WELL SUITED） Class II - 中等适配（MODERATELY SUITED） Class III - 勉强适配（MARGINALLY SUITED） Class IV - 不适配（NOT SUITED） Class V - 未分级（NOT RATED） 请参考SOILATTR产品（又名VT DATA——NRCS TOP20土壤属性与文档）附带的说明文档，该产品为佛蒙特州开放地理数据门户中的独立条目；SOILATTR可通过以下链接直接下载：https://drive.google.com/uc?export=download&id=13a68oimr0sVu_D4jXrNKAMNBIbVE9GN7。 调查日期相关信息可访问：https://www.nrcs.usda.gov/wps/portal/nrcs/surveylist/soils/survey/state/?stateId=VT