Topographic Information Systems in the Netherlands

                                          Ferjan Ormeling

                                    (based on material from TDN)

                                        Production overview

                                 Interpretation aerial photographs

                                               fiets

                                   Pencomputer for reconnaissance

                                     Updated aerial photograph

                                   Digitizing aerial photographs

                                            microstation

                                             Test plot

                                      4-Year cycle TOP10vector

                                         Top10vector (DCM)



                         Production of topographic map series, Netherlands

                             Generalization from 1:25.000 to 1:500.000

                               Current selection possibilities at TDN

                                 Current data model for Top10vector

                                        Object-oriented data

                                  Present topographic map 1:25 000

                                     TOP10 converted to objects

                                     TOP10 converted to objects

                                    Objects  with attributes (1)





                   User-specifications TOP10-21st century (1) in the Netherlands

                             User-specifications TOP10-21st century (2)





                              Example of objects with meta-information

                                  Analogue products from TOPvector

                                      Frisian and Dutch names

                                  Use of colours at different maps









                                     Topographic basic objects







                                  Object characteristics: wegdeel

                                   Shows attributes of an object

                                  GML data visualised + attributes

                                  Meta-information for each object

                                     Comparison of urban areas

                                     Comparison of rural areas;
                                 Germany (top) and the Netherlands
                                              1:50 000