Vectorizing flowsheet

Source data scanning. It is better to use a wide-frame high-end scanner: a good raster is a guarantee of success!
Project file preparation. Definition of project parameters: the set of layers, database tables, tracing accuracy, etc. Raster field preparation: joining of fragments, calibration, filtering. Segmentation of the assembled project for processing at several working places.
Raster to vector conversion of segments of the project file. Vectorizing of linear, areal, point objects. Attributive data input, geocoding. Vector data verification.
Joining of project segments. Joining of vector segments and " sewing together " at the boundaries. Final verification of the project.
Data transfer to GIS