LIDAR Composite Digital Terrain Model (DTM) 2m
Summary
The LIDAR Composite DTM (Digital Terrain Model) is a raster elevation model covering ~99% of England at 2m spatial resolution. The DTM (Digital Terrain Model) is produced from the last or only laser pulse returned to the sensor. 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. Produced by the Environment Agency in 2022, the DTM is derived from a combination of our Time Stamped archive and National LIDAR Programme surveys, which have 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 2022 LIDAR Composite contains surveys undertaken between 6th June 2000 and 2nd April 2022. Please refer to the metadata index catalgoues which show for any location which survey was used in the production of the LIDAR composite. 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 +/-15cm RMSE.
Categories
Use limitation statement
There are no public access constraints to this data. Use of this data is subject to the licence identified.
Licence
Open Government LicenceAttribution statement
© Environment Agency copyright and/or database right 2022. All rights reserved.
Technical information
Update frequency
annually
Lineage
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.
Spatial information
Coordinate reference system
http://www.opengis.net/def/crs/EPSG/0/27700Geographic extent
- Latitude from: 49.943 to 55.816
- Longitude from: -6.236 to 2.072
Metadata information
Language
English
Metadata identifier
09ea3b37-df3a-4e8b-ac69-fb0842227b04
Published by
Environment Agency
Contact publisher
Defra Data Services ForumDataset reference dates
Creation date
08 February 2023
Revision date
15 December 2023
Publication date
N/A
Period
- From: 06 June 2000
- To: 02 April 2022
Search
Data and Supporting Information
Data services and download by area of interest | Link | Action |
---|---|---|
Download the survey data | Open link | |
Download the coverage metadata files | N/A | Open link |
LIDAR Composite Digital Terrain Model (DTM) - 2m - WMS | Copy link | Preview |
Metadata Survey Index Catalogues - WMS | Copy link | Preview |
Metadata Survey Index Catalogues - WFS | Copy link | N/A |
Survey Data FAQs | Copy link | N/A |
LIDAR Composite Digital Terrain Model (DTM) - 2m - WCS | Copy link | N/A |
LIDAR Composite Digital Terrain Model (DTM) - 2m - WMTS | Copy link | N/A |
OGC API - Features service | Copy link | Open link |
Full downloads and supporting documentation | Format | Action |
---|---|---|
LIDAR Composite Technical Information Guide.docx | DOCX | Download |