Tree measurements on large-scale aerial photographs

Authors: T.E. Avery, J. Canning
Publication: New Zealand Journal of Forestry, Volume N.Z.J.For. 1973, Issue N.Z.J.For. 18(2) 1973, pp 252-264, Aug 1973
Publisher: New Zealand Institute of Forestry

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Abstract: For ground determinations of timber stand volumes, a common procedure is to first obtain estimates of stem diameters at breast height, tree heights, and number of stems per hectare. Since stem diameters can often be predicted from measurements of tree crown diameters, it follows that the three required variables may also be determined from aerial photographs. With this possibility in mind, a study was initiated at Kaingaroa Forest, New Zealand, during 1970 with the following objectives:

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