It's possible - look at the functions in the spherical geometry library. That may get you started.
But first, make sure this use case is in accordance with the ToS, particularly 10.9: http://code.google.com/apis/maps/terms.html Chris -- http://twitter.com/broady -- You received this message because you are subscribed to the Google Groups "Google Maps JavaScript API v3" group. To post to this group, send email to google-maps-js-api-v3@googlegroups.com. To unsubscribe from this group, send email to google-maps-js-api-v3+unsubscr...@googlegroups.com. For more options, visit this group at http://groups.google.com/group/google-maps-js-api-v3?hl=en.