US Oil and Gas Pipelines

Felt is a nice web mapping app that anyone can use to get a map and add your own data, mark it up and share with others. One of their most interesting example maps is this map of oil and gas pipelines. 

Oil pipelines are in blue and natural gas is orange. I would have reversed that color scheme but I didn't make the map. Interesting to see some pockets of activity. Look at all this gas infrastructure under the Gulf of Mexico,

or this major center of both kinds of activity in Eastern Oklahoma.

The shaded areas are "tight oil and shale gas plays". I'm not familiar with the terminology but it's basically fracking as far as I can tell.

 You can explore the entire map here.