Abstract
This paper first analyses the special problems posed by architectural and archeological photogrammetric surveys, i.e., problems of accuracy and their consequences on the choice of base-line and camera, together with difficulties due to: (a) the surroundings of the subject; (b) the extension of the monument or archeological site; and (c) the wide-range of camera distances. There is no universal solution to these problems, but recent developments of terrestrial photogrammetric equipment to a large extent meet these constraints: (a) by a widening of the range of available focal lengths; (b) by the possibility to modify the principal distances of cameras in order to be able to photograph clearly at different distances; (c) by the introduction of devices enabling one to use large standard slope angles of the principal axes; (d) by a suitable adaptation of plotting instruments to the wide-range of principal distances involved and giving them a fairly satisfactory z range. The problems concerning emulsion bases are also discussed.
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