Hi!
Are the distances available somehow? I.e., the distances between the wikibase:center and the searched locations?
There is a distance function - see https://www.mediawiki.org/wiki/Wikidata_query_service/User_Manual#Distance_f... - and there also soon will be a way to retrieve distances when searching around point - right now they are recalculated and this is a waste since the search already knows the distance, but in current version it discards it.
There's a slight bug in current version (see the example above for the workaround - the hint to disable analytic mode is required in some situations) - that's why it was not announced yet.
But for many applications geof:distance already works. The rest will be implemented an announced soon, probably sometime next week or week after that.