BGS Geology - 50k (DiGMapGB-50) Mass Movement version 8

Data identifying landscape areas (shown as polygons) attributed with type of mass movement e.g. landslip. The scale of the data is 1:50 000 scale. Onshore coverage is provided for all of England, Wales, Scotland and the Isle of Man. Mass movement describes areas where deposits have moved down slope under gravity to form landslips. These landslips can affect bedrock, superficial or artificial ground. Mass movement deposits are described in the BGS Rock Classification Scheme Volume 4. However the data also includes foundered strata, where ground has collapsed due to subsidence (this is not described in the Rock Classification Scheme). Caution should be exercised with this data; historically BGS has not always recorded mass movement events and due to the dynamic nature of occurrence significant changes may have occurred since the data was released. The data are available in vector format (containing the geometry of each feature linked to a database record describing their attributes) as ESRI shapefiles and are available under BGS data licence.本数据集以多边形矢量形式呈现，用于识别标注有块体运动（mass movement）类型（如滑坡（landslip））的景观区域。本数据集比例尺为1:50000，覆盖英格兰、威尔士、苏格兰全境及马恩岛的全部陆上区域。块体运动指堆积物在重力作用下沿斜坡向下移动并形成滑坡的区域，此类滑坡可影响基岩、表层松散堆积物或人工填土。块体运动堆积物的相关描述见于《英国地质调查局（BGS）岩石分类方案》第4卷，但本数据集还涵盖了因地面沉降引发的垮塌地层（foundered strata），此类内容未被纳入上述岩石分类方案中。使用本数据集时需谨慎：历史上BGS并非始终完整记录所有块体运动事件，且由于块体运动的发生具有动态性，数据集发布后可能已出现显著变化。本数据集以矢量格式提供，包含关联属性数据库记录的各要素几何信息，格式为ESRI形状文件（ESRI shapefiles），可依据BGS数据许可协议获取。