Where is the best place to go to in the city centre to get this done?
Take one on a phone or digital camera and submit it with the online app. It'll be accepted by the site. Then on the morning of your embassy meeting, go to the pharmacy next to the embassy. They'll take the pictures that meet the US requirements and you can bring them with you into the appointment. When you go up to the window they'll tell you your digital submission isn't good enough, at which point you give them the one from the pharmacy. Trust me, I've done this a lot.
Ok thanks, I'll keep that in mind. I might get some done here and then some in the pharmacy by the embassy to be double prepared. Haven't booked my embassy app yet (waiting on my ds-2019) but hopefully ill get an ok appointment time