After I upgraded Mediawiki to version 1.28, Semantic MediaWiki to 2.4.2 and Maps to 4.01, Google Maps are no longer displayed; instead Leaflet/OpenStreetMaps maps are shown. The bug must be in the Maps extension. Putting the following line in my Localsettings file has no effect:
$GLOBALS['egMapsDefaultService'] = 'googlemaps3';
but if I instead change the line
$GLOBALS['egMapsDefaultService'] = 'leaflet';
in Maps_Settings.php to
$GLOBALS['egMapsDefaultService'] = 'googlemaps3';
then GoogleMaps are displayed as expected. The parameter value in Localsettings.php must be either ignored or overwritten by that in Maps_Settings.php.
As always: thank you for your good work!
Henrik Thiil Nielsen