How to embed Photo Spheres into web pages (and upload to Google Maps)

Is there any way to retroactively attach geolocation data to the image?

I typically keep gps off and the Store Location setting in the Camera app to off. As such, I can't post some older photospheres to Maps, just to Google+.
 
This is great!

And this just made me realize the connection to photosphere and the standard google street view you get with maps.

Google is brilliant! Send out the photosphere capability to anybody and have their streetview(photosphere view) content made for them! This becomes a truly collaborative effort from anyone with a Google phone (for the future I assume).