The project aims to achieve the following objectives: 1. to ascertain the needs of a user of the current drainage class map that criteria regarding quality, utility, to map parameters, etc. can be established; 2. The evaluation of possible methods for updating drainage class cards in the light of the Flemish situation with regard to available data, the needs of users, cost and quality of the relevant methods; 3. The selection of (an) appropriate method (s) and evaluating that the method (s) in a number of case studies in Flanders, using case studies already carried out, where possible, and validation of observation; 4. The formulation and implementation of a method to determine the necessity of updating area covering; 5. Estimating the cost and identify critical success factors of an actualization actualization in needy areas in Flanders and inventory of activities in this area in Wallonia.