73c25700-052a-4d3e-87cf-71326fe2d73a English 863bb531-4c51-4a3f-858c-c592e8ba5bf7 Environment Agency metadata@environment-agency.gov.uk 2024-06-11T14:35:24.95194Z Gemini 2.2 http://www.opengis.net/def/crs/EPSG/0/27700 LIDAR Composite DTM 2020 - 2m 2021-06-01 2021-06-01 668881ad-4f8f-42bd-b835-89acf0269496_resource The LIDAR Composite DTM (Digital Terrain Model) is a raster elevation model covering >93% of England at 2m spatial resolution. Produced by the Environment Agency in 2020, this dataset is derived from a combination of our Time Stamped archive and National LIDAR Programme, which has been merged and re-sampled to give the best possible coverage. Where repeat surveys have been undertaken the newest, best resolution data is used. Where data was resampled a bilinear interpolation was used before being merged. The 2020 LIDAR Composite contains surveys undertaken between 6th June 2000 and 1st September 2020. Please refer to the survey index files which shows, for any location, what Time Stamped survey or National LIDAR Programme block went into the production of the LIDAR composite for a specific location. The DTM (Digital Terrain Model) is produced from the last return LIDAR signal. We remove surface objects from the Digital Surface Model (DSM), using bespoke algorithms and manual editing of the data, to produce a terrain model of just the surface. Available to download as GeoTiff files in 5km grids, data is presented in metres, referenced to Ordinance Survey Newlyn, using the OSTN’15 transformation. All LIDAR data has a vertical accuracy of +/-15cm RMSE. Light Detection and Ranging (LIDAR) is an airborne mapping technique, which uses a laser to measure the distance between the aircraft and the ground. Up to 500,000 measurements per second are made of the ground, allowing highly detailed terrain models to be generated at spatial resolutions of between 25cm and 2 metres. The Environment Agency’s open data LIDAR archives includes the Point Cloud data, and derived raster surface models of survey specific areas dating back to 1998 and composites of the best data available in any location. This metadata record is for Approval for Access product AfA458. Attribution statement: (c) Environment Agency copyright and/or database right 2021. All rights reserved. Attribution statement: © Environment Agency copyright and/or database right 2015. All rights reserved. Environment Agency DSPcustomerforum@environment-agency.gov.uk https://support.environment.data.gov.uk/hc/en-gb Defra Data Services Forum https://hosted-metadata-uat.bgs.ac.uk/geonetwork/srv/api/records/73c25700-052a-4d3e-87cf-71326fe2d73a/attachments/LIDAR_DTM.PNG LIDAR_DTM.PNG OpenData Open Government Licence There are no public access constraints to this data. Use of this data is subject to the licence identified. English environment elevation true -6.236 2.072 49.943 55.816 true http://data.ordnancesurvey.co.uk/doc/country/england 2000-06-06 2020-09-01 Open format | Geo Tagged Image File Format (GeoTIFF) https://environment.data.gov.uk/DefraDataDownload/?Mode=survey DSP:ESRI Survey_Download Survey Download https://environment.data.gov.uk/image/rest/services/SURVEY/LIDARCompositeDTM2m2020/MapServer WWW:LINK-1.0-http--link LIDARCompositeDigitalTerrainModel(DTM)_2m_2020_PublicESRIRESTEndpoint LIDAR Composite Digital Terrain Model (DTM) - 2m - 2020 - Public ESRI REST Endpoint https://environment.data.gov.uk/spatialdata/lidar-composite-digital-terrain-model-dtm-2m-2020/wms WMS LIDARCompositeDigitalTerrainModel(DTM)_2m_2020_WMS LIDAR Composite Digital Terrain Model (DTM) - 2m - 2020 - WMS https://environment.data.gov.uk/image/rest/services/SURVEY/LIDAR_Composite_2m_DTM_2020_Aspect/ImageServer WWW:LINK-1.0-http--link LIDARCompositeDTM2020_2m_AspectImageServiceEndpoint LIDAR Composite DTM - 2020 - 2m - Aspect - Image Service Endpoint https://environment.data.gov.uk/image/rest/services/SURVEY/LIDAR_Composite_2m_DTM_2020_Elevation/ImageServer WWW:LINK-1.0-http--link LIDARCompositeDTM2020_2m_ElevationImageServiceEndpoint LIDAR Composite DTM - 2020 - 2m - Elevation - Image Service Endpoint https://environment.data.gov.uk/image/rest/services/SURVEY/LIDAR_Composite_2m_DTM_2020_Hillshade/ImageServer WWW:LINK-1.0-http--link LIDARCompositeDTM2020_2m_HillshadeImageServiceEndpoint LIDAR Composite DTM - 2020 - 2m - Hillshade - Image Service Endpoint https://environment.data.gov.uk/image/rest/services/SURVEY/LIDAR_Composite_2m_DTM_2020_Slope/ImageServer WWW:LINK-1.0-http--link LIDARCompositeDTM2020_2m_SlopeImageServiceEndpoint LIDAR Composite DTM - 2020 - 2m - Slope - Image Service Endpoint https://environment.data.gov.uk/image/rest/services/SURVEY/LIDAR_Composite_2m_DTM_2020_TSR/ImageServer WWW:LINK-1.0-http--link LIDARCompositeDTM2020_2m_TSRImageServiceEndpoint LIDAR Composite DTM - 2020 - 2m - TSR - Image Service Endpoint https://environment.data.gov.uk/DefraDataDownload/?mapService=EA/SurveyIndexFiles&Mode=spatial DSP:ESRI Metadata Shapefile Index Catalogues - Download Download the coverage metadata files https://environment.data.gov.uk/spatialdata/survey-index-files/wms OGC:WMS Metadata Index Catalogues - WMS Coverage metadata files - Web Map Service https://environment.data.gov.uk/spatialdata/survey-index-files/wfs OGC:WFS Metadata Index Catalogues - WFS Coverage metadata files - Web Feature Service https://support.environment.data.gov.uk/hc/en-gb/sections/360001747351-Survey-Data-Catalogue http: Survey Data Catalogue FAQs Survey Data Catalogue FAQs https://mapapps2.bgs.ac.uk/waterdataexplorer/index.html?extent=55648.1126%2C12540.6051%2C902316.4726%2C595286.5622%2C27700&showLayers=LondonEarth_136_0%3BLondonEarth_136_1%3BLondonEarth_136_2%3BLondonEarth_136_3%3BLondonEarth_136_4%3Bwms_668_LC.LandCoverSurfaces%3Bwms_9158_LC.25m.GB%3Bwms_7301_LC.25m.GB%3BLIDAR_Composite_2m_DTM_2019_Elevation_9592%3BLIDAR_Composite_2m_DTM_2019_Slope_6196 WWW:LINK-1.0-http--link Water Data Explorer Web GIS Layer viewed in the Water Data Explorer Web GIS Light Detection and Ranging (LIDAR) is an airborne mapping technique, which uses a laser to measure the height of the terrain and surface objects on the ground such as trees and buildings. Hundreds of thousands of measurements per second are made of the ground allowing highly detailed terrain models to be generated at spatial resolutions of between 25cm and 2 metres. The vertical accuracy of the LIDAR dataset is +/-15cm RMSE.