LiDAR height data

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Product Description:

The EA’s LiDAR data archive contains digital elevation data derived from surveys undertaken by the EA’s internal remote sensing team.  LiDAR (Light Detection and Ranging) is an airborne mapping technique which uses lasers emitted from an aircraft to measure the distance to the ground.  Up to 100,000 measurements per second are made of the ground, allowing highly detailed terrain models to be created at varying spatial resolutions.  The EA provide accurate elevation data for over 70% of England, focused on urban areas, rivers, and the coast.

EA LiDAR datasets are available in two different forms:

  • Digital Surface Model (DSM) – this is produced from the signal returned to the LiDAR unit, and thus includes heights of objects such as vehicles, buildings, and vegetation, as well as the terrain surface.
  • Digital Terrain Model (DTM) – this is produced by removing objects from the DSM, to leave a ‘bare earth’ surface.

EA LiDAR datasets are available at the following spatial resolutions (please note, geographic extent can vary by resolution):

  • 25cm
  • 50cm
  • 1m
  • 2m

EA LiDAR datasets can be presented in two different formats:

  • Digital Elevation Model (DEM) raster dataset providing pixel values of height, in the form of an ESRI ASCII grid raster
  • Terrain Surface Relief (TSR) rendered image showing a depiction of terrain height, in the form of a georeferenced JPEG image

 

Product Availability:

EA LiDAR datasets available through the Jisc Geospatial Platform service are summarised below:

LiDAR Type  Spatial Resolution  Data Format
 DSM  25cm, 50cm, 1m, 2m  TSR
 DTM  25cm, 50cm, 1m, 2m  TSR

 

Dataset Thumbnail:

 

Dataset Specification:

Product Name

 LiDAR 25cm DSM/DTM TSR

Data Provider

 Environment Agency (EA)

Scale

25cm-2m resolution

Coverage

England (partial)

Data Structure

Raster

Format(s)

GeoTIFF, GeoJPEG

Uses

Licencing

OS OpenData Licence

Update Frequency

 

Dataset Resources:

LiDAR Product site