We offer a system CAD drawing conversion, that converts mechanical, building plans, construction documents, as-built drawings, electrical and plumbing drawings into a format suitable for CAD. The clients can also send their handmade sketches, IFF, PDF etc and the final output is a fully editable multi-layer CAD format. The system is based on the assumption that even when the vectorized drawing is distorted, it can be correctly interpreted by using knowledge about the representation rules used in technical drawings and about the manufacturing technology associated with the represented objects. We also provide raster to vector services to convert architectural, mechanical and various technical drawings, maps, archive drawings, schematic diagrams even photos and other types of line artwork such as AutoCAD Plans Drafting and Desktop Publishing.