Sony have developed a method of taking Gigapixel satellite
pictures which are more accurate.
According to New Scientist, satellite
photography is bedevilled with a low field of view which means that High
resolution images need to be taken and tiled. Vehicles can end up
appearing more than once if they move from one image to the next between
exposures, for example.
Sony's new technology uses a wide-angle camera
that can image a 10-kilometre-square area from an altitude of 7.5 kilometres
with a resolution better than 50 centimetres per pixel. The camera
has a gigapixel resolution, and able to record images at a rate of 4 frames
per second.
Individual vehicles could be monitored without any danger of
losing them as they move from one ground level CCTV system to
another.
More here.