SurfZone Digital Elevation Model 2014

This dataset has been retired and replaced with Surfzone DEM 2019 dataset available here: https://environment.data.gov.uk/dataset/77e6f743-d708-4909-a80f-9510b7dbaa16 The SurfZone Digital Elevation Model (DEM) was produced in 2014 to model the coastal zone post the 2013/2014 UK winter storms. Using the best available LIDAR and near-shore multibeam SONAR bathymetry available at the time, it is the best currently available Digital Elevation Model (DEM) covering the inter-tidal zone produced by the Environment Agency. The SurfZone DEM was produced by using a bespoke feathering technique to smooth the overlaps between LIDAR and Bathymetric surveys to produce a seamless surface. Small gaps between surveys were interpolated to produce a full coverage DEM of the near-shore. For all regions except Anglian Digital Terrain Models (DTM) derived from LIDAR were used. For the Anglian coastline a Digital Surface Models (DSM) were used. All LIDAR data used in the production of the SurfZone DEM was surveyed by the Environment Agency. Bathymetry Data was supplied by the Environment Agency and the National Network of Regional Coastal Monitoring Programmes of England from the Channel Coastal Observatory (www.channelcoast.org) website. The EA SurfZone DEM 2014 is supplied as a tiled raster dataset in GeoTiff format. Each tile is 5km * 5km and aligned to the Ordinance Survey National Grid. Each pixel represents 2 metres spatial resolution on the ground and elevations are presented in metres to Ordinance Survey Great Britain using the OSGM'15 and OSTM'15 transformation models. Elevations are referenced to Newlyn except for the Isles of Scilly which is referenced to St Marys. The data is also available as an ESRI Image Service enabling you to use the data at source with GIS. The Metadata Index Catalogue layer provides information about the source of the elevation data used, either LIDAR or Bathymetry for any area as well as the surface type, coastal monitoring region, geoidal model and transformation models used. The catalogues are available to download in shapefile, ESRI File Geodatabase and GeoJSON. The National Network of Regional Coastal Monitoring Programmes of England comprises of 6 Regional Programmes. You must use the copyright statements in the licence restrictions section of this document to acknowledge the individual regions. Attribution statement: © Environment Agency copyright and/or database right 2017. All rights reserved. Scarborough Borough Council: “Data/image courtesy of the Northeast Regional Coastal Monitoring Programme. Data available under Scarborough Borough Council." East Riding of Yorkshire Council: “Data/image courtesy of the East Riding of Yorkshire Coastal Monitoring Programme. Data available under East Riding of Yorkshire Council". New Forest District Council: “Data/image courtesy of the Channel Coastal Observatory. Data available under New Forest District Council." Teignbridge District Co: "Data/image courtesy of the Southwest Regional Coastal Monitoring Programme. Data available under Teignbridge District Council". Sefton Metropolitan Borough Council: "Data/image courtesy of the Northwest Regional Coastal Monitoring Programme. Data available under Sefton Council".本数据集已退役，取而代之的是2019年版Surfzone数字高程模型（Digital Elevation Model, DEM），可通过以下链接获取：https://environment.data.gov.uk/dataset/77e6f743-d708-4909-a80f-9510b7dbaa16 SurfZone数字高程模型（DEM）于2014年制作，用于模拟2013/2014年英国冬季风暴后的海岸带。该数据集采用当时可获取的最优激光雷达（Light Detection and Ranging, LIDAR）与近岸多波束声呐测深数据制作，是英国环境署（Environment Agency）目前已发布的覆盖潮间带的最优数字高程模型。 SurfZone DEM采用定制化羽化技术处理激光雷达与测深调查数据间的重叠区域，以生成无缝曲面；并通过插值填补了调查数据间的细小空隙，最终实现近岸区域的全覆盖DEM。除安格利亚（Anglian）海岸区域外，其余区域均采用基于激光雷达生成的数字地形模型（Digital Terrain Model, DTM）；安格利亚海岸区域则采用了数字表面模型（Digital Surface Model, DSM）。 本数据集制作所用的全部激光雷达数据均由英国环境署勘测完成；测深数据由英国环境署与英格兰区域海岸监测计划国家网络（National Network of Regional Coastal Monitoring Programmes of England）从海峡海岸观测站（Channel Coastal Observatory，www.channelcoast.org）官网获取。 EA SurfZone DEM 2014以GeoTIFF格式的分块栅格数据集形式提供，每个分块尺寸为5km×5km，坐标系与英国地形测量局（Ordnance Survey）国家网格对齐。每个像素对应地面2米的空间分辨率，高程值以米为单位，基于OSGM'15与OSTM'15转换模型，采用英国地形测量局大不列颠高程基准。除锡利群岛（Isles of Scilly）采用圣玛丽（St Marys）基准外，其余区域高程均以纽林（Newlyn）为基准。该数据同时以ESRI影像服务形式提供，支持用户在源端通过地理信息系统（Geographic Information System, GIS）直接调用。 元数据索引目录图层可提供任意区域的高程数据来源（激光雷达或测深数据）、曲面类型、海岸监测区域、大地水准面模型及转换模型等信息。该目录可通过SHP、ESRI文件地理数据库以及GeoJSON格式下载。 英格兰区域海岸监测计划国家网络包含6个区域监测项目。用户需遵循本文件许可限制部分中的版权声明，对各区域分别进行致谢。版权声明：© 英国环境署版权及/或数据库权利2017。保留所有权利。 士嘉堡自治市议会（Scarborough Borough Council）："数据/图像承蒙东北区域海岸监测项目提供。数据依据士嘉堡自治市议会许可发布。" 约克郡东瑞丁自治市议会（East Riding of Yorkshire Council）："数据/图像承蒙约克郡东瑞丁海岸监测项目提供。数据依据约克郡东瑞丁自治市议会许可发布。" 新森林区议会（New Forest District Council）："数据/图像承蒙海峡海岸观测站提供。数据依据新森林区议会许可发布。" 廷布里奇区议会（Teignbridge District Council）："数据/图像承蒙西南区域海岸监测项目提供。数据依据廷布里奇区议会许可发布。" 塞夫顿都会自治市议会（Sefton Metropolitan Borough Council）："数据/图像承蒙西北区域海岸监测项目提供。数据依据塞夫顿议会许可发布。"