Businesses and opening hours come from OpenStreetMap and Google Maps listings (names, categories, ratings, phone numbers, websites and weekly hours where Google shows them), plus names found on shopping-street sites, plus every address the Kadaster register marks as a shop, office, meeting or hospitality space that has no known business yet (shown as "To check", in the Oude Noorden and the neighbourhoods around it). Addresses and neighbourhoods from PDOK (Kadaster), generated . Routes walk one side of a long street up and the other side back, shorter streets door to door. Distances are straight-line times 1.25. Hours for the thirty shops that already have a new site were checked by hand; the rest are what the map data says, so a grey light means unknown, not closed. If a shop is missing or gone, write it in the notes of the nearest stop.