Logging pattern. Satellite image showing the checkerboard pattern left by logging operations along the Idaho-Montana border, between Clearwater and Bitterroot National Forests, USA. Each 1x1 mile square seen here is harvested at a different time, producing a pattern of varied timber density and re-growth stages. Imaged by the ASTER (Advanced Spaceborne Thermal Emission and Reflection Radiometer) instrument onboard NASA's Terra satellite, on 30th July 2012.