A recently released map of D.C. provides a look into the city’s past.

Wymer’s DC is an interactive map that allows users to click on location markers around the city. For each site, the map shows a historic photos of the city, juxtaposed with what the scene looks like now as per Google Street View.

According to DCist, the images were taken by John P. Wymer. From 1948-1952, the statistician at the Bureau of Standards created a map that divides the city into 57 sections and set out to take photographs of everyday life in the city. He amassed a collection of 4,000 images, half of which are contained in the map.

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