c67f6085-1ef9-46c8-b908-67e9143deedf
eng
utf8
dataset
Environment Agency
metadata@environment-agency.gov.uk
pointOfContact
2019-10-11
Gemini
2.2
http://www.opengis.net/def/crs/EPSG/0/27700
LIDAR Composite DTM - 2m
2014-10-01
creation
2019-04-18
revision
c67f6085-1ef9-46c8-b908-67e9143deedf
DSTR09329
The LIDAR Composite DTM (Digital Terrain Model) is a raster elevation model covering ~75% of England at 2m spatial resolution. Produced by the Environment Agency, this dataset is derived from a combination of our full time stamped archive, 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. The composite is updated on an annual basis to include the latest surveys.
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 ASCII 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. A tinted shaded relief, which is an image showing what LIDAR looks like when loaded into specialist software, is also available as a WMS feed. You can also download survey index files which shows, for any location, what Time Stamped survey went into the production of the LIDAR composite.
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 and composites of the best data available in any location.
To find out more about LIDAR and the various surface models we produce please read our story map
This metadata record is for Approval for Access product AfA458. Attribution statement: (c) Environment Agency copyright and/or database right 2019. 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
pointOfContact
annually
Mapping
OpenData
LIDAR
Elevation
theme
flood
GIS digital format
mapping
remote sensing
theme
GEMET - Concepts, version 2.4
2010-01-13
publication
geonetwork.thesaurus.external.theme.gemet
Open Government Licence
otherRestrictions
license
copyright
There are no public access constraints to this data. Use of this data is subject to the licence identified.
vector
eng
utf8
environment
true
-5.7
1.8
50
55.8
true
http://data.ordnancesurvey.co.uk/doc/country/england
1998-01-01
2017-09-02
Open format | Arc/Info ASCII Grid (AAIGrid)
not applicable
https://environment.data.gov.uk/DefraDataDownload/?Mode=survey
DSP:ESRI
Survey_Download
Survey Download
https://environment.data.gov.uk/spatialdata/lidar-composite-digital-surface-model-dtm-2m/wms
WMS
LIDARCompositeDTM2m_WMS
LIDAR Composite Digital Surface Model (DTM) - 2m WMS
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_FAQs
Survey Data Catalogue FAQs
dataset
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.