We’ve now run two posts with maps of… something in DC. The last one showed the location of community gardens. Can you guess what this one is showing? If you need clues, there are two after the jump!

All maps made by the author, with data from the District government’s open data portal.

The maps in this post show the location and boundaries of a certain something in the District. Here are two clues:

  1. The District officially recognizes 56 of these in the city. Some locations are also listed in federal registries, but not all.
  2. Georgetown was one of the first neighborhoods in the country to get one of these.

Here is a closer look at two possibly helpful sections:

We’ll hide the comments so the early birds don’t spoil it for the rest of you. We’ll add the answer as an update to this post on Friday, and also tweet the answer @ggwash.

Answer update: The map shows the location and boundaries of each historic district in the city. The District officially recognizes 32 residential and commercial neighborhood districts, 15 government and institutional districts and nine park and parkway districts. For a complete list of historic districts in DC, visit the Office of Planning’s website.

Note: Due to readability, not all historic districts are labeled.

75 commenters got guessed correctly, the first five being Alex B., Joseph Henchman, Ian M., Richie, and Michael Perkins. Thanks for playing!

Tagged: fun, maps, technology

Scott Kaiser is an environmental planner specializing in urban watershed management and building climate resilient communities around the world. He has a strong interest in the application of geospatial technologies to better inform resource management decisions and is an all-around urban planning nerd.