2009/9/14 Chris Hill <o...@raggedred.net>: > One of the airfields I flew from was a base for the OS photo surveying > unit. They had a 'plane which had been modified to have a downward > pointing, very expensive camera built into the fuselage. They could > then fly long straight strips, taking overlapping photos and then taking > overlapping strips. The pilots didn't stay long - it was a very > difficult and tedious job getting the strips to line up. They flew a > few in a day, always in the same direction to assist with the way your > track gets moved by the wind.
I would take the assumption they were using a medium format digital camera such as a Hasselblad. If I was going to take quality pictures of the ground from a plane I would want to use medium format as that would give high resolution images. Jack Stringer _______________________________________________ Talk-GB mailing list Talk-GB@openstreetmap.org http://lists.openstreetmap.org/listinfo/talk-gb
