Identification

Title

LIDAR Composite DTM 2019 – 10m

Alternative title(s)

Abstract

The LIDAR Composite DTM (Digital Terrain Model) is a raster elevation model covering >85% of England at 10m spatial resolution. This 10m model is a resampled version of the 2m DTM produced by the Environment Agency in 2019. The DTM 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. A bilinaer interpolation method was used to resampled from 2m to 10m resolution. The 2019 LIDAR Composite contains surveys undertaken between 12th March 1998 and 1st September 2019. 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. This resampled 10m dataset is available to download as a single GeoTiff Raster file from a sharefile link. Data is presented in metres, referenced to Ordinance Survey Newlyn, using the OSTN’15 transformation. 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. 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: © Environment Agency copyright and/or database right 2020. All rights reserved.

Resource type

dataset

Resource locator

https://ea.sharefile.com/d-sdb14ba7922248d08

protocol: WWW:DOWNLOAD-1.0-http--download

name:

description: LIDAR Composite DTM 2019 – 10m download

https://support.environment.data.gov.uk/hc/en-gb

protocol: http:

name: DSP_CUSTOMER_FORUM

description: DEFRA Data Services Platform Customer Forum

Unique resource identifier

code

f46accdf-0aed-47d0-8673-21789ed35afa_resource

codeSpace

Dataset language

eng

Spatial reference system

code identifying the spatial reference system

http://www.opengis.net/def/crs/EPSG/0/27700

Classification of spatial data and services

Topic category

environment

elevation

Keywords

Keyword set

keyword value

OpenData

Geographic location

West bounding longitude

-6.236

East bounding longitude

2.072

North bounding latitude

55.816

South bounding latitude

49.943

Extent

Extent group

authority code

code identifying the extent

http://data.ordnancesurvey.co.uk/doc/country/england

Temporal reference

Temporal extent

Begin position

1998-03-12

End position

2019-09-01

Dataset reference date

date type

creation

effective date

2020-05-29

date type

revision

effective date

2020-07-08

Frequency of update

notPlanned

Quality and validity

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.

Conformity

Data format

name of format

Open format | Geo Tagged Image File Format (GeoTIFF)

version of format

Constraints related to access and use

Constraint set

Use constraints

Open Government Licence

Constraint set

Limitations on public access

There are no public access constraints to this data. Use of this data is subject to the licence identified.

Responsible organisations

Responsible party

organisation name

Environment Agency

email address

DSPcustomerforum@environment-agency.gov.uk

web address

https://support.environment.data.gov.uk/hc/en-gb

description: Defra Data Services Forum

responsible party role

pointOfContact

Metadata on metadata

Metadata point of contact

organisation name

Environment Agency

email address

metadata@environment-agency.gov.uk

responsible party role

pointOfContact

Metadata date

2020-08-04

Metadata language

eng