Patent ID: 7549254

Claim:
A built structure having an upward facing surface; said built structure supporting a first image and a second image; said upward facing surface at least partially overlaid by said first image in the form of first indicia; said first image arranged for visibility from overflying craft; and wherein a size and orientation of the first image defines a cone of legibility; said cone of legibility describing generally an inverted conical section of a sphere having a generator substantially equal to a maximum distance of resolution of the smallest discrete detail of said first image; said second image in the form of a substantially vertically oriented sign having second indicia thereon arranged for viewing from ground level; said upwardly facing surface structurally associated with both said first image and said second image wherein at least one of said first image and said second image comprise an active image in communication with a local controller whereby each respective image can be replaced by loading a fresh image from the local control and wherein said local controller is in communication with a remote computer wherein said remote computer is adapted to communicate one or more of said first image and said second image to said local controller and wherein said first image and said second image are formed on or in a flexible planar material and wherein said flexible planar material comprises electronic digital paper.