抄録
Photographs were taken with two amateur cameras, epuipped with a synchroneus motive mechanism, for the purpose of measuring of the speed and direction of the water current.
Inner orientation elements of the cameras have not been determined, but photographs taken from the side of a river, are oriented by the use of a few control points on the other side.
It aims to gain the adequate data with a low cost, getting rid of many difficult conditions in practice.
