Victorian Soil type mapping

A spatial map layer of soil type (Australian Soil Classification) for Victoria. The harmonised map consists of 3,300 land units (totaling about 225,000 polygons) derived from around 100 soil and land surveys carried out in Victoria over the past 70 years. The land units have been attributed according to the Australian Soil Classification (Order and Suborder levels of the classification scheme) based on their likely dominant soil type. Particular attention was given to harmonising land units across survey boundaries. A reliability index has been assigned to each land unit based on the quality and relevance of the originating survey, providing a qualitative reliability measure to support interpretation and data use.\n\nSoil site data contained in the Victorian Soil Information System (VSIS), and information on the Victorian Resources Online (VRO) website and original study reports have been combined with landscape knowledge to develop the new maps. Data from approximately 10,000 existing sites recorded, mostly recorded in the VSIS have been used.\n\nThe soil type is based on land mapping conducted at different times, at variable scale, and for different purposes. Land units are therefore of variable scale and quality in relation to the soil they are representing. Many units will be comprised of multiple soil types and a range of soil properties, and local variability (e.g. at paddock scale level) can also sometimes be high. The mapping, therefore, is intended to represent the dominant, or most prevalent, broad soil type within the map unit. It is therefore adequate for regional or state-wide overviews but may not often be accurate enough for localised or within-farm assessments. For more detailed soil and land information, users are advised to refer to the original land study for any given map unit (e.g. via Victorian Resources Online website).

维多利亚州土壤类型空间图层（采用澳大利亚土壤分类体系，Australian Soil Classification）。本协调统一后的地图包含3300个土地单元（总计约22.5万个多边形图斑），其数据源自过去70年间在维多利亚州开展的约100项土壤与土地调查项目。各土地单元依据其主导土壤类型，按照澳大利亚土壤分类体系的分类等级（纲与亚纲级别）完成属性赋值。本次制图特别注重对不同调查边界间的土地单元进行协调统一。同时基于原始调查的质量与相关性，为每个土地单元赋予可靠性指数，以此提供定性化的可靠性评估指标，辅助数据解译与实际应用。

本新型土壤图的编制整合了维多利亚州土壤信息系统（Victorian Soil Information System, VSIS）中的土壤点位数据、维多利亚州资源在线（Victorian Resources Online, VRO）网站公开的相关信息与原始研究报告资料，并结合景观相关专业知识完成。本次制图共使用了约1万个已记录的现有土壤点位数据，其中绝大多数收录于VSIS数据库内。

本土壤类型图层基于不同时期、不同比例尺且服务于不同目标的土地调查制图成果编制，因此各土地单元在比例尺与所表征土壤的质量层面均存在差异。多数土地单元会包含多种土壤类型与一系列土壤属性，局部尺度（如牧场地块级别）的土壤变异性有时也会较高。因此，本图层旨在表征地图单元内占主导地位或最为普遍的宽泛土壤类型，适用于区域或全州范围的概览性分析，但通常难以满足局地或农场内部评估所需的精度要求。若需获取更详细的土壤与土地信息，建议用户通过维多利亚州资源在线网站等渠道，查询对应地图单元的原始土地调查研究资料。