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.
|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|
|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|
DSM and DTM
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.
- 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
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.
- 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
Ordnance Survey MasterMap
The most detailed, current and comprehensive map dataset of Great Britain
Ordnance Survey MasterMap + Aerial Imagery
Combine OS MasterMap with Aerial Imagery in one multi-layered PDF
Ordnance Survey MasterMap + Aerial Imagery + Contours
Get complete site information using OS MasterMap with height information in contour format and Aerial Imagery