From Random Hacks of Kindness, a rainfall visualization in D3.js.

PITCH_Africa builds rainwater harvesting devices for rural Africa, ranging in size from a personal water collection kit to a soccer field that can store 1,000,000 liters of water.

The PITCH_Africa Rainfall Map identifies how suitable locations around the world are for rainwater harvesting using a heatmap generated with D3.js. Click on a country for a breakdown of rainfall and reservoir water levels by month. There are three choices for reservoir size – also try changing the number of people drawing water from the reservoir.

I built this map with Brendan Wright (Princeton ’15) at Random Hacks of Kindness, a Princeton hackathon in Fall of 2011. I made the map portion of the project in D3.js and also managed the overall design. It’s still under active development, and we’re working on algorithms to make the map look better and convey information more precisely.