Features and benefits

Our height data and LiDAR products for site landscape and topography add up to the most comprehensive online range in terms of detail and coverage.

Easy to work with, the data can be brought into CAD and GIS software to enable 3D analysis and provide important contextual information for a range of applications.

 Usable formats                                                                                                                                                                                                            

Supplier Dataset Name Resolution Vertical Accuracy Coverage DTM or DSM Data Collection Method
Environment Agency EA LiDAR 2m-0.25m +/- 15cm Coastal, flood risk and urban centres Both LiDAR and photogrammetry
Ordnance Survey OS Terrain 5 5m +/- 1.5m Urban, +/- 2.5m Rural GB DTM Photogrammetry, topographical survey
Ordnance Survey OS Terrain 50 50m +/- 4m GB DTM Photogrammetry, topographical survey
Intermap Nextmap 5m +/- 1m GB Both IFSAR
LPS LPS OS NI 10m +/- 1m NI DTM Photogrammetry
Airbus Defence & Space Astrium LiDAR 2m - 0.5m +/- 15cm 100+ GB urban areas Both LiDAR
Blom ? Up to 0.25m +/- 15cm London Both LiDAR
Cities Revealed ? 2m or 1m +/- 15cm Numerous urban centres and environs Both LiDAR


Digital Surface Models (DSMs) provide a topographic model of the earth's surface. They measure the height values of the first surface on the ground as seen from above, including terrain features, buildings, vegetation and power lines.

Digital Terrain Models (DTMs) provide a topographic model of the bare earth / underlying terrain of the earth's surface and are usually derived from DSMs by digitally removing the man-made and vegetation features. The stated accuracy of a DTM will therefore usually be slightly lower than that of the DSM it's derived from, particularly in areas of continuous and dense building and tree coverage.

Perfect for

  • Terrain modelling and visualisation
  • Site analysis and planning
  • Flood modelling
  • Cut and fill analysis
  • Line of sight analysis
  • Drainage analysis
  • Environmental impact assessment
  • Landscape visualisation
  • Radio wave propagation
  • Utilities and management
  • Noise and pollution modelling
  • View shed analysis

Usable formats

We can supply the data in six main formats, and you'll need CAD or GIS software to open and use it:

  • DXF Format Points CAD
  • ASCII Grid for GIS
  • DXF 3D Face CAD
  • XYZ – easting, northing, height CAD/GIS
  • Erdas Imagine image file GIS
  • Contours – DXF files for CAD/GIS

In most cases an Ordnance Survey-based map or aerial imagery will be needed in order to relate the height information to geographic and topographical features.

When opened in CAD/GIS, all formats are geo-referenced with an x, y location (eastings, northings on the Ordnance Survey National Grid) making it very easy to precisely overlay height data with OS mapping products. In CAD, an insertion point of 0,0 will need to be specified if prompted by the software.

We can also supply various other formats of height data on request - please contact us for details.

Key Points

  • Extensive range of formats to suit a huge variety of software and applications
  • Vast spread of resolutions to meet any needs, from contextual overviews to advanced 3D analysis
  • Full product support available from our experienced technical team


All samples include every file type available.

EA LiDAR 2m DSM37mb

EA LiDAR 2m DTM37mb

EA LiDAR 50cm DSM35mb

EA LiDAR 50cm DTM31mb

5m Nextmap DSM6.3mb

5m Nextmap DTM6.2mb

OS Terrain 56mb

OS Terrain 50120kb

LPS NI 10m DTM2.8mb

From £10 + VAT

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