| http://www.w3.org/ns/prov#value | - In preferred embodiments, the observation mechanism 24 is a camera such as the Redlake MegaPlus??? or any other digital camera model; and the offset mechanism 28 is a probe such as the light pen sold by Metronor AS of Norway, described in Swedish Patent No. 456 454 and Norwegian Patent No. 169 799.
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