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Terrain Models

William Kirk • Jul 05, 2022

DTM, DTM and CHM from Lidar

Our drone surveys using lidar sensing technologies can provide you with rapid, accurate and repeatable land profiles including in forested & vegetated areas, as well as providing insights into the forests/vegetation themselves.

Lidar surveys also support identification of land features such as archaeology, drainage and man made structures.

Surveys at different times can also be used to calculate volumetric changes in land and vegetation as a consequence of activities in farming, landfilling, quarrying, erosion and development.

Outputs such as raster layers, point clouds and meshes can easily be integrated into GIS and other packages for easy analysis alongside your existing data.

Our Lidar surveys from drone platforms can achieve c.500points/m2 with <5cm real-world accuracy. Surveys provide a high level of coverage for any site, overcoming access issues which typically hinder ground based GPS survey. The key benefits in lidar use is the ability to produce digital surface, digital terrain and canopy height models (DTM, DSM and CHM), which cannot be produced using photogrammetry.

Lidar surveys can also be paired with high resolution imaging, multispectral and radiometric sensing to provide cost-effective high-level insights.


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