Arctic Coastal Plain Boundaries and Transects

Figure 1.  Arctic Coastal Plain, Alaska, survey boundary, human settlements (red points), and relevant federal land management units including (a) the National Petroleum Reserve—Alaska (NPR-A), the Teshekpuk Lake Special Area (TLSA), and Arctic National Wildlife Refuge (ANWR) and (b) transect locations for the early and later-flown surveys. Survey transects were flown in a four-year rotation.