[Openstreetmap] Areal photos for free?
andy at hexten.net
Fri Feb 18 16:38:09 GMT 2005
On 18 Feb 2005, at 16:19, Petter Reinholdtsen wrote:
> The camera and the gps should be close to each other to make sure the
> position error of camera matches that of the position error of the
> gps. (Is this really necessary, if the relative position of the GPS
> and the camera is know?)
The parallax error due to not knowing exactly which direction the
camera is potentially huge compared with any error due to the relative
position of the GPS and the camera. It's also a /really big job/ to
photograph the whole country from a light aircraft - or even any
significant area. In addition aren't there huge no-fly zones for light
aircraft? Significantly they'd be over cities.
Andy Armstrong, hexten.net
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