Right, then: having definitely decided to
use Coppermine for the gallery, I am now using Koken… Just felt that
Coppermine looks a bit dated now, and Koken is much “cleaner”. Now I
have to decide whether white or grey background is better…
Have to say that Koken is quirky, but once you get used to its
idiosyncracies it’s quite impressive. Handling of geotagged photos was a
bit disappointing as it uses Google Maps whereas I want Openstreetmap.
However, a simple change sorted that out: just change
storage/themes/elementary/content.lens in the <koken:geolocation>
section to replace
href="http://maps.google.com/?q= geolocation.latitude , geolocation.longitude "
href="https://www.openstreetmap.org/?mlat= geolocation.latitude &mlon= geolocation.longitude #map=18/ geolocation.latitude / geolocation.longitude "
(The 18 is a number specifying the zoom level; 18 seems about right.)