Countryside Survey 1978 estimates of Broad Habitat areas in Great Britain

Countryside Survey is a unique study or 'audit' of the natural resources of the UK's countryside. The Survey has been carried out at regular intervals since 1978. The countryside is sampled and surveyed using rigorous scientific methods, allowing us to compare new results with those from previous surveys. In this way we can detect the gradual and subtle changes that occur in the UK's countryside over time. This dataset consists of stock data for habitats across Great Britain in 1978. The data are national estimates generated by analysing the sample data from 256 1km squares and scaling up to a national level. The data are summarized as habitat area per Land Class. The sample sites are chosen from a stratified random sample, based on a 15 by 15 km grid of GB. Surveys have been carried out in 1978, 1984, 1990, 1998 and 2007 with repeated visits to the majority of squares. In addition to habitat areas, species plot, soil plot, linear habitat, freshwater habitat and satellite map data are also produced by Countryside Survey.

乡村调查（Countryside Survey）是针对英国乡村自然资源开展的一项独特研究与“评估”。自1978年起，该调查以固定间隔定期实施。研究采用严格的科学方法对乡村进行抽样与调查，使新结果可与以往调查结果对比分析，从而检测英国乡村随时间发生的渐进且细微的变化。

本数据集包含1978年全大不列颠（Great Britain）范围内栖息地的存量数据。这些数据为全国估计值，通过分析256个1公里见方区域的样本数据并扩展至全国层面生成。数据按土地类别（Land Class）汇总为各类栖息地面积。样本点基于大不列颠15×15公里网格，通过分层随机抽样（stratified random sample）选取。乡村调查分别于1978、1984、1990、1998及2007年开展，大部分区域被重复访问。除栖息地面积数据外，该调查还产出物种样方、土壤样方、线性栖息地、淡水栖息地及卫星地图数据。