February 7, 2011
When Should I Visit? finds the least busy time to visit the museums, galleries and theatres of London. It states the quietest day and provides a glanceable graph to judge the relative popularity of different days. The site is intended to show the data in the simplest possible way with no unnecessary detail.
A small cron job checks the /herenow endpoint in the foursquare api a few times an hour. The number of people present is logged for each venue that is tracked. Once a week these checkins are aggregated and passed to the frontend web application hosted on Heroku. The graphs are generated in SVG using Raphael in the browser.
(Full Story: When Should I Visit? – foursquare app)
