Indeed, it is from the harborwalk outside the library. It's somewhat of a similar angle as Carson Beach area.
Shawn knows his stuff. As a native too i have to say a picture of International Place with none of the cluster of buildings that are on three sides of it in the picture, is hard to do. I actually had to look at it for a while to figure out where the heck the shot was taken from. Another thing that struck me is the incredible vantage points you were at to take some of these pictures. One of the best sets of our photogenic city than i have ever seen on here
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"You need both a public and a private position." --Hillary Clinton, speaking behind closed doors to the National Multi-Family Housing Council, 2013