Sites of Special Scientific Interest Units (England)

Sites of Special Scientific Interest Site (SSSI) Units are divisions of SSSIs based on habitat, tenure and management, and are the basis for recording all information on SSSI Condition and management. They range in Area from 0.004ha up to 18,000ha and only overlap where SSSIs overlap. A SSSI is the land notified as an SSSI under the Wildlife and Countryside Act (1981), as amended. Sites notified under the 1949 Act only are not included in the Data set. SSSI are the finest sites for wildlife and natural features in England, supporting many characteristic, rare and endangered species, habitats and natural features. The data does Not include "proposed" sites. Boundaries are generally mapped against Ordnance Survey MasterMap. Full metadata can be viewed on data.gov.uk.具特殊科学价值地点（Site of Special Scientific Interest，SSSI）单元是依据生境、权属与管理模式划分的SSSI细分单元，亦是记录SSSI状况及管理相关全部信息的基础依据。该类单元的面积区间为0.004公顷至18000公顷，仅当SSSI本身存在区域重叠时，单元才会出现重叠。SSSI是指依据经修订的《1981年野生动物与乡村法》完成认定的土地。仅依据1949年法案完成认定的地点未被纳入本数据集。具特殊科学价值地点是英格兰境内野生生物与自然景观的核心保护区域，孕育了大量特有、珍稀及濒危物种、生境与自然景观资源。本数据集未收录"拟认定"类地点。其边界通常依据英国陆军测量局主地图（Ordnance Survey MasterMap）绘制。完整元数据可在data.gov.uk平台查询。