Towards cavity‐collapse hazard maps with Zeb‐Revo handheld laser scanner point clouds

Underground cavities are ubiquitous across northern Europe's cities and countryside due to a long history of mining and building‐stone extraction. Management of cavity‐collapse risks requires detailed knowledge of a cavity's geometry, depth and rock‐mass characterisation. Current mapping practices are neither sufficiently accurate, detailed nor cost‐effective in underground settings. Here, a GeoSLAM Zeb‐Revo handheld mobile laser scanner was tested. Its point clouds reproduced planes faithfully (RMS