This North Yorkshire survey site is covered by mixed woodland and dense tree canopy — terrain where conventional photogrammetry would return only a surface model of the treetops, providing no usable ground elevation data. The interactive slider below overlays the RGB orthomosaic — the standard aerial photograph — against the bare-earth surface model derived from the LiDAR point cloud. Because both datasets are captured simultaneously and georeferenced to the same coordinate system, the overlay is exact. Drag the slider across any area of woodland or dense vegetation to reveal the ground surface hidden beneath the canopy: the true topography that a camera alone cannot see.

This capability is particularly valuable for flood modelling, hydrological analysis, forestry management, infrastructure planning and any application where ground elevation data is required in areas that optical survey methods cannot penetrate.