Edinburgh has a strong mapping community, and I would expect most crosswalks (pedestrian crossings) to be mapped or updated when they change. It’s much better to use on-the-ground information, as even the best aerial imagery can be outdated. Alignment is also going to be tricky with all the hills in Edinburgh.
The OSM community meets up about once a month (although not always advertised). They’re probably going to be meeting this Wednesday evening.
If you are in the area, I highly recommend joining them.
https://wiki.openstreetmap.org/wiki/Edinburgh