I was engaged by The Nature Conservancy, Gulf of Mexico office to create the Charting Restoration site. This project grew out of a print report on Gulf restoration since the Deep Horizon oil spill, and I transformed the maps and charts in that report into an interactive website. The project uses d3.js, leaflet.js, and jQuery to create engaging maps that employ hexagonal binning and can be filtered multiple ways. Modal popups that contain donut and bar charts appear when each state is clicked.
The project has been retired from TNC's site, but you can see the functionality here.