dbadf364-0192-4bcf-a223-f3d403f08682
eng
utf8
dataset
Environment Agency
metadata@environment-agency.gov.uk
pointOfContact
2020-07-14
Gemini
2.2
http://www.opengis.net/def/crs/EPSG/0/27700
LIDAR DTM Time Stamped Tiles
1998-01-10
creation
2020-07-08
revision
e0c64fdb-2502-4efd-b98b-243f70d8e53e
The LIDAR DTM (Digital Terrain Model) Time Stamped Tiles product is an archive of raster elevation data produced by the Environment Agency. Site specific LIDAR surveys have been carried out across England since 1998, with certain areas, such as the coastal zone, being surveyed multiple times. Data is available at varying resolutions of 25cm, 50cm, 1m and 2m, depending on project requirements.
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 rasters in 5km zipfiles, data is presented in metres, referenced to Ordnance Survey Newlyn and data aligned to the OS Grid. All LIDAR data has a vertical accuracy of +/-15cm RMSE. The transformation used on the data is specific to the time period of survey.
You can also download survey index files which show, for any location, what Time Stamped data is available, the specific dates of survey, resolution of product and what transformation and geoidal model used.
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 elevation models to be generated at spatial resolutions of between 25cm and 2 metres.
This metadata record is for Approval for Access product AfA457. Attribution statement: © Environment Agency copyright and/or database right 2020. All rights reserved.
Environment Agency
DSPcustomerforum@environment-agency.gov.uk
https://support.environment.data.gov.uk/hc/en-gb
Defra Data Services Forum
pointOfContact
biannually
OpenData
Elevation
Mapping
LIDAR
theme
GIS digital format
flood
remote sensing
mapping
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.
grid
eng
utf8
environment
elevation
true
-5.7
1.8
50
55.8
true
http://data.ordnancesurvey.co.uk/doc/country/england
1996-12-01
2019-07-04
Open format | Geo Tagged Image File Format (GeoTIFF)
Open format | Shapefile (SHP)
Not Applicable
https://environment.data.gov.uk/DefraDataDownload/?Mode=survey
DSP:ESRI
Survey_Download
Survey Download
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://ea.sharefile.com/d-s6a05346b75d40da8
FILE:RASTER
Z Difference Grid for adjusting data between OSTN02 and OSTN15.
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.