LIDAR Composite First Return DSM 2020 - 2m
The LIDAR Composite First Return DSM (Digital Surface Model) is a raster elevation model at 2m spatial resolution produced by the Environment Agency in 2020. The first return DSM is produced from the first or only LIDAR signal returned to the sensor and includes heights of objects, such as vehicles, buildings and vegetation, as well as the terrain surface where the first or only return was the ground. The dataset has been produced by resampling the 1m first return DSM composite dataset to 2m. The first return DSM composite product is derived from LIDAR data captured as part of our national timeseries programme between 11 November 2016 and 23rd March 2020. This programme divided England into local blocks for survey over continuous winters from 2016 onwards. These individual surveys have then been merged together to create the first return LIDAR composite using a feathering technique along the overlaps to remove any small differences in elevation between surveys. The first return DSM will not match in coverage or extent the standard DSM composite which is produced from the last or only return as the last return DSM composite is produced from both the national LIDAR programme and Timeseries surveys. The data is available to download as GeoTiff rasters in 5km tiles aligned to the OS National grid. The data is presented in metres, referenced to Ordinance Survey Newlyn and using the OSTN’15 transformation method. All individual LIDAR surveys going into the production of the composite had a vertical accuracy of +/-10cm RMSE. Please refer to the survey index files which shows for any location what national LIDAR programme survey went into the production of the LIDAR composite for any specific location. ESRI Image REST services are available for elevation, hillshade, slope and aspect and a tinted shaded relief image is also available as a WMS feed. This metadata record is for Approval for Access product AfA458. Attribution statement: (c) Environment Agency copyright and/or database right 2022. All rights reserved. Attribution Statement: © Environment Agency copyright and/or database right 2015. All rights reserved.
dataset
https://environment.data.gov.uk/DefraDataDownload/?Mode=survey
protocol: DSP:ESRI
name: Survey_Download
description: Survey Download
protocol: WWW:LINK-1.0-http--link
name: LIDARCompositeFirstReturnDigitalSurfaceModel(DSM)_2m_2020_PublicESRIRESTEndpoint
description: LIDAR Composite First Return Digital Surface Model (DSM) - 2m - 2020 - Public ESRI REST Endpoint
protocol: WMS
name: LIDARCompositeFirstReturnDigitalSurfaceModel(DSM)_2m_2020_WMS
description: LIDAR Composite First Return Digital Surface Model (DSM) - 2m - 2020 - WMS
protocol: WWW:LINK-1.0-http--link
name: LIDARCompositeFirstReturnDSM2020_2m_AspectImageServiceEndpoint
description: LIDAR Composite First Return DSM - 2020 - 2m - Aspect - Image Service Endpoint
protocol: WWW:LINK-1.0-http--link
name: LIDARCompositeFirstReturnDSM2020_2m_ElevationImageServiceEndpoint
description: LIDAR Composite First Return DSM - 2020 - 2m - Elevation - Image Service Endpoint
protocol: WWW:LINK-1.0-http--link
name: LIDARCompositeFirstReturnDSM2020_2m_HillshadeImageServiceEndpoint
description: LIDAR Composite First Return DSM - 2020 - 2m - Hillshade - Image Service Endpoint
protocol: WWW:LINK-1.0-http--link
name: LIDARCompositeFirstReturnDSM2020_2m_SlopeImageServiceEndpoint
description: LIDAR Composite First Return DSM - 2020 - 2m - Slope - Image Service Endpoint
protocol: WWW:LINK-1.0-http--link
name: LIDARCompositeFirstReturnDSM2020_2m_TSRImageServiceEndpoint
description: LIDAR Composite First Return DSM - 2020 - 2m - TSR - Image Service Endpoint
https://environment.data.gov.uk/DefraDataDownload/?mapService=EA/SurveyIndexFiles&Mode=spatial
protocol: DSP:ESRI
name: Metadata Shapefile Index Catalogues - Download
description: Download the coverage metadata files
https://environment.data.gov.uk/spatialdata/survey-index-files/wms
protocol: OGC:WMS
name: Metadata Index Catalogues - WMS
description: Coverage metadata files - Web Map Service
https://environment.data.gov.uk/spatialdata/survey-index-files/wfs
protocol: OGC:WFS
name: Metadata Index Catalogues - WFS
description: Coverage metadata files - Web Feature Service
https://support.environment.data.gov.uk/hc/en-gb/sections/360001747351-Survey-Data-Catalogue
protocol: http:
name: Survey Data Catalogue FAQs
description: Survey Data Catalogue FAQs
2cef2771-fa6a-477e-ab40-48e9a9b31714_resource
eng
http://www.opengis.net/def/crs/EPSG/0/27700
environment
elevation
OpenData
-6.236
2.072
55.816
49.943
http://data.ordnancesurvey.co.uk/doc/country/england
2016-11-11
2020-03-23
creation
2021-10-22
revision
2021-10-22
notPlanned
The LIDAR Composite First Return DSM (Digital Surface Model) is a raster elevation model at 2m spatial resolution produced by the Environment Agency in 2020. The first return DSM is produced from the first or only LIDAR signal returned to the sensor and includes heights of objects, such as vehicles, buildings and vegetation, as well as the terrain surface where the first or only return was the ground. The dataset has been produced by resampling the 1m first return DSM composite dataset to 2m. The first return DSM composite product is derived from LIDAR data captured as part of our national timeseries programme between 11 November 2016 and 23rd March 2020. This programme divided England into local blocks for survey over continuous winters from 2016 onwards. These individual surveys have then been merged together to create the first return LIDAR composite using a feathering technique along the overlaps to remove any small differences in elevation between surveys. 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.
Open format | Geo Tagged Image File Format (GeoTIFF)
Open Government Licence
There are no public access constraints to this data. Use of this data is subject to the licence identified.
Environment Agency
DSPcustomerforum@environment-agency.gov.uk
https://support.environment.data.gov.uk/hc/en-gb
description: Defra Data Services Forum
pointOfContact
Environment Agency
metadata@environment-agency.gov.uk
pointOfContact
2022-08-16