My own quad tree, they're not that hard to write :) We're not considering opening the data. But we are working with cities to help improve their bike infrastru

My own quad tree, they're not that hard to write :) We're not considering opening the data. But we are working with cities to help improve their bike infrastructure http://bikeportland.org/2014/05/01/odot-embarks-on-big-data-project-with-purchase-of-strava-dataset-105375 http://bikeportland.org/2014/05/01/odot-embarks-on-big-data-...