Also, looking on Google Earth, when you leave the city the imagery date is July 22, the date of the folk fest. I suspect when they were making the Calgary image, there were clouds or some other reason the image of the island was not good, so they swapped in one from the July 22 pass, but perhaps they treat the city as one image to eliminate disconformities, so it got assigned the date of the rest of the city image, rather than leaving it separate.
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