3Deling use photogrammetry to document geometry and natural colours of any objects such as: elevations; ceilings; floors; wall paintings etc. To do this, we take many photos in rows and columns using calibrated digital camera and we measure control points to georeference them. Then we use spatial software with stereoscopic view to create a 3D model and generate ortho images of each photo. Finally we mosaic
all ortophotos into one orthoghonal image which often contains several hundred mega pixels. Accuracy depends on pixel size, for elevations we use single pixel at 2-5mm size. This gives about 10-20mm accuracy. Wall paintings and smaller objects might have 0.2-0.5mm pixel and 1-2mm accuracy. Orthophoto is scalable and can be opened in any CAD software for additional measurements and vectorization.