Wednesday, September 14, 2016

The Bridges of Allegheny County

The Evolution of Pittsburgh's River Bridges is an interactive map companion to the book, Pittsburgh's Bridges, from the "Images of America" series
Bridges are color coded by type and the slider in the upper left corner lets you see what bridges existed over the last 200 years. You can pan and zoom and click on a bridge for details from the book.
Yes many of them are yellow!
Where photos are not available there are diagrams of the bridges.
The map was produced by Lauren Winkler, who also made a nice map poster for the book.

Bonus map - Pittsburgh's bridges in 1902-animated birds-eye view!

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