Property Subsidence Assessment dataset

The property subsidence assessment dataset provides an understanding of the shrink-swell hazard at both the individual property and/or postcode level for England and Wales. It builds upon the BGS GeoSure shrink-swell data by mapping the hazard to the individual building polygon and considering the other susceptibility factors of building type, foundation depth, and drainage and tree proximity. The data consist of GIS building polygons with an overall susceptibility to subsidence score between 1-100. Scores are also classified from non-plastic to very high. Each building polygon is also scored from 1-10 for each subsidence factor (geology, foundation, drainage, building type, building storey and tree proximity). Postcode data is also available as a table showing the ‘average’ PSA score for all buildings within the postcode. The identification of shrink-swell related subsidence prone areas, alongside the inclusion of potential sources to exacerbate these phenomena, can better inform insurers and homeowners and form the basis to make decisions concerning prevention and remediation. The product enhances geological information obtained from GIP (BGS GeoSure Insurance Product) and GeoSure via the inclusion of the crucial shrink-swell susceptibility factors (proximity to trees and foundation depth). This therefore allows the derivation of a risk element for the housing stock at Building level, which is then generalised to Postcode level. BGS GeoSure - a series of GIS digital maps identifying areas of potential natural ground movement hazard in Great Britain

该财产沉降评估数据集旨在为英格兰和威尔士地区的个体财产及/或邮编级别的收缩膨胀风险提供认知。该数据集在BGS GeoSure收缩膨胀数据的基础上构建，通过将风险映射到单个建筑多边形，并考虑建筑类型、基础深度、排水和树木邻近性等其他敏感性因素，从而深化了对风险的理解。数据包括具有1-100总体沉降敏感性评分的GIS建筑多边形。评分也被归类从非塑性到极高。每个建筑多边形还针对每个沉降因素（地质、基础、排水、建筑类型、建筑层数和树木邻近性）进行1-10的评分。邮编数据也以表格形式提供，显示邮编内所有建筑的‘平均’PSA评分。识别与收缩膨胀相关的沉降易发区域，并包括可能加剧这些现象的潜在来源，可以更好地为保险公司和房主提供信息，并成为预防与修复决策的基础。该产品通过包含关键的收缩膨胀敏感性因素（树木邻近性和基础深度），增强了从GIP（BGS GeoSure保险产品）和GeoSure获取的地质信息，从而允许推导出建筑级别的住房库存风险要素，并将其推广至邮编级别。BGS GeoSure——一系列识别大不列颠潜在自然地面运动风险区域的GIS数字地图。