50m contours of Great Britain

The data is presented in OSGB coords and is free to use and distribute. Note: this is a corrected version (as of 30th Sept 2009) that includes the 50m contour. Contours were derived from 90m SRTM data that was cleaned and had holes patched. The contours were created in ArcMap at 50m intervals. The data does not include the Shetland Islands as SRTM data becomes unreliable at 60N. The cell size is close to 90m. Contours were derived from Level one 90m SRTM data. SRTM data was cleaned and holes were filled. Contours were created in ESRI ArcGIS. GIS vector data. This dataset was first accessioned in the EDINA ShareGeo Open repository on 2010-06-30 and migrated to Edinburgh DataShare on 2017-02-21.

本数据集采用OSGB（英国国家大地坐标系）标注坐标，可免费使用与分发。注：本数据集为截至2009年9月30日的修正版本，包含50米等高线。等高线数据源自经清洗处理并填充孔洞的90米分辨率航天飞机雷达地形测绘任务（SRTM）数据，以50米间隔在ArcMap中生成。由于北纬60度以北区域的SRTM数据可靠性不足，本数据集未包含设得兰群岛的相关数据。数据格网单元尺寸接近90米，本次等高线数据源自一级90米分辨率SRTM数据，该原始SRTM数据已完成清洗与孔洞填充工作。等高线通过ESRI ArcGIS平台生成，属于GIS矢量数据。本数据集于2010年6月30日首次存入EDINA ShareGeo Open仓储库，并于2017年2月21日迁移至Edinburgh DataShare平台。