|The image at right is a 3D view of an
ortho-rectified image draped on an IFSAR digital elevation model (DEM).
The blue vector represents shoreline compiled by the contractor from the
radar imagery. The red vector represents NGS shoreline compiled from photogrammetry.
This image illustrates some of the issues associated with compiling shoreline
from radar imagery. The island located in the center of the image was compiled
as land, however upon inspection of the photography it can be identified
as floating ice.
Click image for a full