2e8d0733-4f43-48b4-9e51-631c25d1b0a9
eng
utf8
dataset
Environment Agency
metadata@environment-agency.gov.uk
pointOfContact
2022-03-21
Gemini
2.2
http://www.opengis.net/def/crs/EPSG/0/27700
National LIDAR Programme
2019-03-25T00:00:00
creation
2021-11-02T00:00:00
revision
2e8d0733-4f43-48b4-9e51-631c25d1b0a9
The Environment Agency National LIDAR Programme aims to provide accurate elevation data at 1m spatial resolution for all of England by the end of 2021. The country has been divided into approximately 230 logical blocks with survey starting in November 2016. Surveys are undertaken during winter months (approximately November to April each year) and published through the DEFRA Data Services Portal.
LIDAR is an airborne mapping technique which accurately measures the height of the terrain and surface objects on the ground, through the use of a scanning laser that measures the distance between the aircraft and the ground. From this remote sensing technique we produce a number of products available to download:
LIDAR Point Cloud: is the discrete LIDAR returns that are used in the creation of the surface models. Supplied in *.laz format they the discrete LIDAR returns have been classified into ground, low, medium and high vegetation classes using an automated classification process.
Digital Surface Model(s) (DSM) are created from the last or only LIDAR pulse returned to the sensor and contains all ground and surface objects.
Digital Terrain Model(s) (DTM) is created from the last return LIDAR pulse classified as ground, filtering out surface objects. Manual filtering is undertaken on the DTM to improve the automated classification routines to produce a most likely ground surface model. Areas of no data, such as water bodies, are also filled to ensure there are no gaps in the model.
First Return Digital Surface Model(s) (FZ DSM) is created from the either the first or only LIDAR pulse returned to the sensor and contains all ground and surface objects. It is more likely to return elevations from the top or near top of trees and the edges of buildings. It can often be used in canopy height modelling and production of building outlines.
Intensity Surface Model(s) (Int DSM) is a measure of the amount of laser light from each laser pulse reflecting from an object. This reflectivity is a function of the near infrared wavelength used and varies with the composition of the surface object reflecting the return and angle of incidence.The intensity surface model produces a grayscale image where darker surfaces such as roads reflect less light than other surfaces such as vegetation.
All products are available in 5km tiles aligned to the ordnance survey grid. The tiles are named by the unique survey id, OS grid reference and the first and last survey date of the survey id (P_XXXXX_OSOSOS_SDFLOWN_EDFLOWN.*). The surface models are available in GeoTiff raster format whilst the point cloud is available in *.laz. An index catalogue is also available with provides survey specific information about each tile. Attribution statement: © Environment Agency copyright and/or database right 2015. All rights reserved.
Environment Agency
DSPcustomerforum@environment-agency.gov.uk
https://support.environment.data.gov.uk/hc/en-gb
Defra Data Services Forum
pointOfContact
quarterly
OpenData
theme
Elevation
theme
GEMET - INSPIRE themes, version 1.0
2018-07-25
publication
geonetwork.thesaurus.external.theme.httpinspireeceuropaeutheme-theme
survey
theme
remote sensing
theme
Open Government Licence
otherRestrictions
license
copyright
There are no public access constraints to this data. Use of this data is subject to the licence identified.
grid
eng
utf8
environment
elevation
true
-6.236
2.072
49.943
55.816
true
http://data.ordnancesurvey.co.uk/doc/country/england
2016-11-11T00:00:00
2021-04-05T00:00:00
Open format | Geo Tagged Image File Format (GeoTIFF)
Not Applicable
Open format | Shapefile (SHP)
Not Applicable
https://environment.data.gov.uk/DefraDataDownload/?Mode=survey
DSP:ESRI
National_LIDAR_Programme_Survey_Download
National LIDAR programme Survey Download
https://environment.data.gov.uk/DefraDataDownload/?mapService=EA/SurveyIndexFiles&Mode=spatial
DSP:ESRI
Metadata Shapefile Index Catalogues - Download
Download the coverage metadata files
https://environment.data.gov.uk/spatialdata/survey-index-files/wms
OGC:WMS
Metadata Index Catalogues - WMS
Coverage metadata files - Web Map Service
https://environment.data.gov.uk/spatialdata/survey-index-files/wfs
OGC:WFS
Metadata Index Catalogues - WFS
Coverage metadata files - Web Feature Service
https://support.environment.data.gov.uk/hc/en-gb/sections/360001747351-Survey-Data-Catalogue
http:
Survey_Data_FAQs
Survey Data Catalogue FAQs
dataset
To find out more about our current survey plans and historic capture visit: https://environment.maps.arcgis.com/apps/webappviewer/index.html?id=11a8edc1c1d341379c857bf3d3806e4b