Projection-based guide for sensitive tree root excavation. Master Thesis Medical Design. Civil engineering operations often collide with tree roots, damaging the vital structures in the process and increasing the risk of disease or death of the tree. ROOTMAP aims to decrease tree root damage by providing a visualization of the roots on site. The projection shows a 3D model produced from an underground radar scan. The laser projector is designed to withstand the harsh conditions of construction sites. Intuitive interaction is at the core of the design.