GEarth has an option for an overview map (ctrl M or Options > Overview Map) but it shows your location on a world scale and doesn't show direction of view.
In Streetview on Google Maps the equivalent is a lot more sophisticated with a person icon and an arrow showing direction. In a GEarth tour it is good practice to show users a similar inset map with a more relevant smaller scale as it helps them understand where they are and which direction they are facing. I've produced a tour to illustrate how to do this using Screen Overlays, click the image below to be taken to the tour (GEarth Plugin needed):
The tour shows you various views and I turn the inset map (a screen overlay I created using a graphics package) on and off in the tour to show how it could work. Note that as best practice I usually align my view northwards in a tour unless there's a good reason to do otherwise. If you changed viewing direction in a tour the inset map would be more useful.
Of course, it would be a lot better if the inset map was programmed so location and view direction changed in real time as in street view rather than being static images, this would be a nice feature to see in GEarth.