![heatmap - 2009-12-21.png](https://i0.wp.com/daveschumaker.net/wp-content/uploads/2009/12/heatmap-2009-12-21.png?resize=500%2C464)
Where Do You Go is an interesting mashup that shows the areas you most frequent in a city, using a heat map layed on top of Google Maps. The data is derived from your Foursquare checkins.
The above image represents the areas of San Francisco I most frequent, based on nearly 400 checkins with Foursquare over the last year. Red / white are areas visited the most, while blue / green (and grey) are areas I visit the least or not at all.
This is a pretty fantastic use of one’s geo-location data and it’s something I’ve always been curious about. Just where exactly do I go all the time, and what areas do I frequent. This sort of thing might help plan further adventures to parts of the city that I neglect. I just might have to reinstall Foursquare on my iPhone after all!
![location_apps_tweet.png](https://i0.wp.com/daveschumaker.net/wp-content/uploads/2009/12/location_apps_tweet.png?resize=432%2C264)
Of course, when I do finally reinstall Foursquare, what happens?
![foursquare_error.jpg](https://i0.wp.com/daveschumaker.net/wp-content/uploads/2009/12/foursquare_error.jpg?resize=320%2C480)
Go figure.