The composite view shows how surface oil has spread over one month. Darker areas indicate where oil was concentrated over time, and lighter areas indicate the maximum spread of the oil slick from its origin from nearly a mile below where the Deepwater Horizon rig once was.

With a click on the red markers on the map, pop-up windows reveal the latest photos and video of areas affected by the spill. More points and media are added to the map daily -- be sure to return often to see the latest reports from CNN, iReporters and Getty Images.