I create tools and data visualizations using transportation data.
Most of the projects shown here use data and APIs from Capital Bikeshare and WMATA.
My main language is JavaScript and CSS, with some experience with the D3 library. I use PHP to write my own proxy scripts to access APIs. I create QuickTime animations using Java (via Processing).
I work with many APIs: Google Maps, Google Places, WMATA, Yelp, the USDA farmers markets API, Meetup, Twitter, Flickr, and Interchange by Kaiser Permanente, as well as XML feeds from Capital Bikeshare and Citi Bike.
I work at CATT Lab in UMD College Park, and also run the Transportation Techies Meetup group.
My blog is at mvjantzen.com/blog.