Image URLs for Picasaweb, Google+, and Drive Uploads

Picasaweb / Plus Instant Upload images are stored seperately from Drive. This is unfortunate because it means you can’t use Drive APIs and tools with synced images. In particular, Drive exposes public files via well known URLs while the situation with Picasaweb is much less rosy.

Example queries:

XML Pretty Print is useful, since ?alt=json doesn’t seem to work on all endpoints.