If a large number of old aerial photographs is exist but there is no premarked ground-control- and also no kinematics-GPS on board of photo-centre-position for aerial triangulation, then the post GCP-survey would be very hard. The most problem is to identify the place on photographs to the current situation and to get the place. In the first part, the experience of such project in Kalimantan will be explained. In the second part is the idea how to accelerate and optimised the whole GCP survey
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