LIDAR Composite DTM 2020 - 1m

Published by:
Environment Agency
Last updated:
24 March 2023
Topic:
Not added
Licence:
Other Licence
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Summary

PLEASE NOTE: This dataset has been retired. A new version of the data is available here: https://environment.data.gov.uk/dataset/13787b9a-26a4-4775-8523-806d13af58fc

The LIDAR Composite DTM (Digital Terrain Model) is a raster elevation model covering >88% of England at 1m 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.

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Data links

Link to the data Format File added Data preview
Survey Data Catalogue FAQs N/A 24 March 2023 Not available
Metadata Index Catalogues - WFS N/A 24 March 2023 Not available
Metadata Index Catalogues - WMS N/A 24 March 2023 Not available
Metadata Shapefile Index Catalogues - Download N/A 24 March 2023 Not available

Additional information

View additional metadata
Added to data.gov.uk
2023-03-22
Access contraints
There are no public access constraints to this data. Use of this data is subject to the licence identified.
Harvest GUID
668881ad-4f8f-42bd-b835-89acf0269496
Extent
Latitude: 55.816° to 49.943°
Longitude: -6.236° to 2.072°
Spatial reference system
http://www.opengis.net/def/crs/EPSG/0/27700
Dataset reference date
2021-06-01 (creation)
2021-06-01 (revision)
Frequency of update
notPlanned
Responsible party
Environment Agency (pointOfContact)
ISO 19139 resource type
dataset
Metadata language
eng
Source Metadata
XML
HTML

Contact

Enquiries

Access DSP Support pages: https://environment.data.gov.uk/support

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National Customer Contact Centre Freedom of information requests for this dataset

Licence information

Open Government Licence