The aerial scanning we undertake is extensive, and we provide digital and hard versions of the data. This also includes digital terrain modelling, digital surface modelling and elevation data.

What is a Digital Terrain Model (DTM)?

A Digital Terrain Model (also known as a ‘DTM’) is a representation of the terrain using point elevation information.

We provide the only accurate digital surface model, also known as 'Canopy Modelling' for England, Wales and Southern Scotland as part of the NEXTMap Britain product suite. The digital data is posted every five metres and has a nominal vertical accuracy of 1.0 metre.

What can Digital Surface Models (DSM) be used for?

Digital surface models allow you to gain access to the most up-to-date National Elevation coverage and to access areas as small as 0.5 km x 0.5 km.

Example applications for digital surface models include Radio Signal Propagation, Line of Sight Analysis, Noise and Wind Modelling, Visualisation and Simulation Environment and Risk Assessments, and Wide Area Network Planning

You can also use digital surface models in combination with other geographical information (eg: digital aerial photography) to visualise and provide real world interpretations of the relevant area of the UK.

Aerial Mapping & Survey Project

Our aerial mapping and survey project started with the Millennium MapTM, the most comprehensive aerial map of the UK and the benchmark for all future aerial maps. With both annual re-flying programmes and a completely new aerial survey of the UK planned every five years, it will remain the most important source of UK aerial photography.