LIDAR DTM Time Stamped Tiles

Openness rating:
Reason: Content of file appeared to be format "HTML" which receives openness score: 0.
★★★★★  Linked data - data URIs and linked to other data (e.g. RDF)
★★★★☆  Linkable data - served at URIs (e.g. RDF)
★★★☆☆  Structured data in open format (e.g. CSV)
★★☆☆☆  Structured data but proprietry format (e.g. Excel)
★☆☆☆☆  Unstructured data (e.g. PDF)
Score updated: 19/11/2017

Responsible Party: Environment Agency (pointOfContact)

Mapping

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. Our LIDAR DTM (Digital Terrain Model) time stamped tiles product is a 'bare earth' model with surface objects filtered out of the DSM by applying bespoke software techniques to leave the best representation of the terrain of the ground. For each Digital Surface Model supplied a coincident digital terrain model is also available. Supplied as individual ASCII files labelled by Ordinance Survey grid reference the DTM product may be available at 2m, 1m, 50cm and 25cm resolutions. Historic data are available for some areas where we have carried out repeat surveys, such as in the coastal zone for monitoring change. All LIDAR data has a vertical accuracy of +/-15cm RMSE.

To download data please visit the Open Data Portal: http://environment.data.gov.uk/ds/survey/index.jsp#/survey Data is available in 5km download zip files for each year of survey. Within each downloaded zip file are ASCII files aligned to the Ordinance Survey grid. The size of each tile is dependant upon the spatial resolution of the data. Elevation values are presented in millimetres.

Catalogue shapefiles of data extent are available via the resource locator link below. The catalogue shapefiles contain metadata for each tile including the start and and date flown of a survey and spatial resolution. Attribution statement: © Environment Agency copyright and/or database right 2017. All rights reserved.

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Dataset Extent

Latitude: 55.8° to 50.0°
Longitude: -5.7° to 1.8°

Data Resources (2)

Resource locator
Resource locator

Additional Links (2)

XML
Source GEMINI2 record
HTML
Source GEMINI2 record (formatted)

Additional Information

Added to data.gov.uk 22/06/2017
Theme Mapping
Themes (secondary) Environment
Harvest URL http://environment.data.gov.uk/discover/ea
Harvest date 20/11/2017 14:39
Metadata date 20/11/2017
Harvest GUID dbadf364-0192-4bcf-a223-f3d403f08682
Extent Latitude: 55.8° to 50.0°
Longitude: -5.7° to 1.8°
Spatial reference system http://www.opengis.net/def/crs/EPSG/0/27700
Dataset reference date 10/1/1998 (creation), 23/8/2016 (revision)
Frequency of update biannually
Responsible party Environment Agency (pointOfContact)
Access constraints There are no public access constraints to this data. Use of this data is subject to the licence identified.
ISO19139 resource type dataset
Metadata language English
Temporal coverage No value
Schema/Vocabulary No value
Code list No value
Service Level No value
Coupled Services (none)