FIG 2 - uploaded by M.H. Alex Schoeman
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(a) Shows the difference between a satellite imagery (left) and LiDAR-derived DEM view (right), line threads (polygon lines) in (b) were manually draped over a satellite picture (left). This demonstrates how certain stone walls are obscured by vegetation (left) and can only be seen on the DEM picture (right), demonstrating the DEM's capacity to reveal hidden stone walls.
Source publication
Interest in precolonial stone-walled structures in Mpumalanga began in the 19th century AD when European settlers and travellers encountered these stone-walled complexes. Since then these sites, which are associated with African farming communities, have been investigated using ground-based surveys and aircraft-based remote sensing, including LiDAR...
