This feature wasn't available to the Google Maps API back in 2009: https://groups.google.com/forum/?fromgroups#!topic/google-maps-api/TzmOTLyyhY4
I wonder if this is due to licensing (like with the transit layer). -- You received this message because you are subscribed to the Google Groups "Google Maps JavaScript API v3" group. To view this discussion on the web visit https://groups.google.com/d/msg/google-maps-js-api-v3/-/p7JST_UbB9cJ. 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.
