> that need for an external service to decode plus codes diminishes my enthusiasm for the standard considerably The short code is "some place plus an override

> that need for an external service to decode plus codes diminishes my enthusiasm for the standard considerably The short code is "some place plus an override for the lower bits". You could just ship a list of common places to do that rough orientation, but the problem with the short codes is that every place is eligible as a base point, with lots of redundancy: - 65P4+PX Hünstetten, Germany - 65P4+PX Wallbach, Germany - 65P4+PX Hohenstein, Deutschland - 65P4+PX Wiesbaden, Deutschland - 65P4+PX Limburg, Deutschland - 65P4+PX Bad Ems, Allemagne all point to the same place, but for that you need to know that these towns and cities are roughly in the same place (and that Germany, Deutschland and Allemagne are the same). Meanwhile - 65P4+PX Koblenz, Deutschland is a different place, even though Koblenz is also nearby (but in the next quadrant, so the offset override points elsewhere) and - 65P4+PX Limburg, Belgien uses the same town name in a different country, therefore pointing elsewhere, too. I guess it would be an interesting challenge to try to build the smallest representation of country and town names in Nominatim to denote OLS quadrants for offline storage that still allows quick lookups (that is, no compression that takes several hours and gigabytes to seek through).