Last calendar month I posted a brusque review of Map & Globe, a Leaflet map synchronized alongside a D3.js globe. In the review I mentioned that you could role the code from Map & Globe to utilisation a pocket-size inset footing on a Leaflet map. Alternatively y'all could role them the other means circular - to render a pocket-size inset Leaflet map inward the corner of a D3 globe.
Chris Whong had the same thought in addition to has genuinely created a Leaflet plug-in to add together a pocket-size 3d footing to the corner of a Leaflet map. Using Chris' Leaflet.GlobeMiniMap plug-in y'all tin add together a pocket-size inset footing to a map which shows the global seat of the electrical current Leaflet map center.
You tin persuasion a working demo of Leaflet.Globe,MiniMap here.