Anywhere in the world.

Help

The dark blue polygons on the map indicate areas that are currently being used for car parking.

Click on the ■ or ⬟ icons on the map to select an area.

The Parkulator calculates the area of the selected region being used for parking, and tells you how many houses could have been built in the space instead.

Click on the buttons to jump to different cities.
Golfulating

Click the square at the top-left of the map to get started.
Location lookup by locationiq.
(This works for the whole world).
Documentation and methods and raw data are on The GitHub repo.
Golfing polygons are extracted from OpenStreetMap and are the copyright of the OSM contributors.
The Map API is hosted on a free-tier server on Azure. I wrote the server myself, the code is awful. If this site gets popular it will go down.