Today’s map comes from the Texas Tribune out of Austin, Texas. The map displays the location of disposal wells, i.e. the sites where the waste water from fracking and related drilling operations are dumped. Firstly, the map hints that the fracking industry is not spread equally across the state.
But secondly, the map does this through the use of hexagons that represent well density. So at a broad, state-wide view, the user sees almost a traditional choropleth. The difference is that these are not natural or political boundaries but rather data constructs designed to aggregate highly granular data points.
![Well locations state-wide are aggregated into coloured hexagons Well locations state-wide are aggregated into coloured hexagons](https://coffeespoons.me/wp-content/uploads/2013/04/aggregate-660.png)
Even nicer, however, is that if you want to see where disposal wells are in your county or town, the map lets you do that too. Because as you zoom in ever closer, the individual wells appear within the hexagons that they colour. It’s a very solid piece of work.
![Individual wells colour the hexagons, but are only visible up close Individual wells colour the hexagons, but are only visible up close](https://coffeespoons.me/wp-content/uploads/2013/04/wells-660.png)
Credit for the piece goes to Ryan Murphy.