The spy satellites — by repute of the thriller writers — have such good image-resolution that they can read the letters on a vehicle licence-plate. A generation after LANDSAT imagery vividly showed broad ecological zones, higher resolution pictures are now being released of a quality to allow practical archaeological application. The example printed here illustrates the Stonehenge landscape — a little patch of southern England that is among the most photographed archaeologically anywhere.
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Martin Fowler (1996) studied this question.
Synapse has enriched one closely related paper. Consider it for comparative context: