The US government has lifted a long-standing restriction that meant companies like Google and Microsoft didn’t have access to the most accurate pictures taken by imaging satellites. Until this week, satellite operators like DigitalGlobe were prevented by law from selling images to foreign or commercial organizations in which features smaller than 50 centimeters were visible. The restriction was meant to ensure that foreign powers didn’t get access to satellite images that were too good. But now that’s changed. DigitalGlobe said it has received approval from the U.S. Department of Commerce to sell sharper images to its clients. That immediately unlocks pictures from its GeoEye-1 satellite, with a resolution of 41 centimeters, and Worldview-2 satellite, at 46 centimeters, but much better pictures will soon be available.