TOP10NL is Kadaster's digital topographic database (BRT). It is the most detailed product in the topographic database. The database is uniform and consistent. TOP10NL is nationwide, which means you can use it for the entirety of the Netherlands. TOP10NL is made up of aerial photos, panoramas, field footage and information from external sources. Kadaster keeps the map of land and buildings up-to-date by interpreting digital footage and third-party sources.
Cyclomedia's imagery is Kadaster's most important source.