To download a TOP50NL file (version 2017):
  • Consult the map index above for the map sheet number. For instance 04O for Vlieland, or 02O  for Schiermonnikoog.
  • Select the Tab "TOP50NL FILES" and search for the correct file names. For instance: top50nl_2017_04O.DWG for Vlieland, and top50nl_2017_02O.DWG for Schiermonnikoog.
  • Download the files.
  • Open the files in AutoCAD or use a free DWG viewer.