Mapzen's Metro Extracts is a site for requesting metro-sized OSM exports. At the time of this project, this page was making up 50% of Mapzen's web traffic, with hundreds of downloads a month. The previous site had a set list of popular extracts, and to request a custom one you would have to submit a pull request on the JSON that created the list.

The new site aimed to make it easier to locate existing extracts, as well as streamline the request process to creating a new one. This allowed people to define custom areas with an in-browser tool, and reduced request times from 1 week to ~45 minutes.

In this project I was responsible for the UI design and implementation. The map is built using Leaflet, while the list filtering and search autocomplete are written in d3.js.