LIDAR Composite First Return Digital Surface Model (FZ_DSM) - 1m

Published by:
Environment Agency
Last updated:
28 February 2025
Topic:
Not added
Licence:
Other Licence
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Summary

The LIDAR Composite First Return DSM (Digital Surface Model) is a raster elevation model covering ~99% of England at 1m spatial resolution. The first return DSM is produced from the first or only laser pulse 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.

Produced by the Environment Agency in 2022, the first return DSM is derived from data captured as part of our national LIDAR programme between 11 November 2016 and 5th May 2022. This programme divided England into ~300 blocks for survey over continuous winters from 2016 onwards. These surveys are 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. Please refer to the metadata index catalgoues which show for any location which survey was used in the production of the LIDAR composite.

The first return DSM will not match in coverage or extent of the LIDAR composite last return digital surface model (LZ_DSM) 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 +/-15cm RMSE. Attribution statement: © Environment Agency copyright and/or database right 2022. All rights reserved.

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Data links

Link to the data Format File added Data preview
LIDAR Composite Technical Information Guide.docx DOCX 28 February 2025 Not available

Additional information

View additional metadata
Added to data.gov.uk
2024-11-22
Access contraints
There are no public access constraints to this data. Use of this data is subject to the licence identified.
Harvest GUID
df4e3ec3-315e-48aa-aaaf-b5ae74d7b2bb
Extent
Latitude: 55.816° to °
Longitude: -6.236° to 2.072°
Spatial reference system
http://www.opengis.net/def/crs/EPSG/0/27700
Dataset reference date
2023-02-08 (creation)
2023-12-15 (revision)
Frequency of update
annually
Responsible party
Environment Agency (pointOfContact)
ISO 19139 resource type
dataset
Metadata language
eng
Source Metadata
XML
HTML

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Licence information

Open Government Licence