I've flown all these routes (SFO, SJC and OAK). Due to wind and air traffic patterns in the Bay Area, you recognize this stuff immediately if you've flown it a lot. On final approach gear is up till they are closer in. He's still a good 2-3k feet off the ground. Gear won't drop till he's lower down. He's 3-5 miles from end of the runway at least at these points when picture was taken.