3D digitisation from plans is the conversion of existing 2D floor plans, sections, and elevations into a fully modelled 3D CAD model — without on-site re-surveying. VDE converts existing plan documents into a spatial building model, ready for direct use in ArchiCAD, Revit, Vectorworks, or Allplan. Unlike Scan-to-BIM, 3D digitisation is based exclusively on existing plans and is the right choice when those plans are current and complete.