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Products / Height Data

Height Data

Detailed measurements of the height of the ground and the structures on it can provide a new dimension to the understanding and management of the local, national or global environment. Bluesky’s range of off-the-shelf and bespoke height products, designed to take geographic information to the next level.

Photogrammetric Digital Terrain Models (DTM) and Digital Surface Models (DSM) are available nationwide in a variety of formats to suit your application. Created photogrammetrically from our high-resolution aerial photography, our DSM provides a 2m grid of heights that includes surface features such as buildings and trees, whilst our DTM provides a bare earth model on a 5m grid.



Products available:

Premium LiDAR DTM - 50cm

LiDAR (Light Detection and Ranging)

DTM (Digital Terrain Model)

Resolution: 50cm

Accuracy XY: ± Up to 10cm rmse

Accuracy Z: ± Up to 5cm rmse


Premium LiDAR DSM - 50cm

LiDAR (Light Detection and Ranging)

DSM (Digital Surface Model)

Resolution: 50cm

Accuracy XY: ± Up to 10cm rmse

Accuracy Z: ± Up to 5cm rmse


Photogrammetric DTM - 5m

DTM (Digital Terrain Models) The Earth’s terrain excluding buildings and vegetation, with a 5-metre grid spacing.

Resolution: 5m

Accuracy XY: ± Up to 1m rmse

Accuracy Z: ± Up to 1.5m rmse


Photogrammetric DSM - 2m

DSM (Digital Surface Models) The Earth’s surface including buildings and vegetation, with a 2-metre grid spacing.

Resolution: 2m

Accuracy XY: ± Up to 1m rmse

Accuracy Z: ± Up to 1.5m rmse