This report proposes two new different methods for the calibration of an underwater camera system (a protective covering and a camera designed for use in air) and also shows practical examples-an underwater camera system is calibrated according to these two methods. The underwater camera system tested belongs to a type that an usual camera is set in a protective covering with a dome window so as to eliminate the refraction of rays, and it has been developed in U.S.A. Through the calibration of the underwater camera system according to the proposed methods, we investigated not only whether the interior orientation elements could be determined, but also whether it could be used for the analytical underwater photogrammetry. It follows as the result that the precise underwater photogrammetry can be performed with this underwater camera system, when sufficient control points are arranged in the object space.
We are now planning to design a precision underwater camera system (a protective covering with a precise dome window and a precision camera whose interior orientation elements are given as constants) in order to carry out the evaluation of the photographed underwater terrain features in usual plotting instruments with a high accuracy.

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Digital analysis method of multispectral air photos or sensor information will be recognized as the basic data handling way on quantitative processing work.
In this report, the author described the result of a test on automatic forest interpretation by multispectral air photos. The classified items were 11. The total estimation was down about 71% correctness. 94% of the hard wood forest was identified correctly. But the identification correctness of “Hinoki (Chamaecyparis obtusa) ” forest was only 51% due to their mixture with “Sugi (Cryptomaria japonica) ”. The size determination of the observation slit was the fundamental factor to be discussed in further studies.

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This paper describes the vigor investigation of street trees using the multispectral photographs which has been taken at a low altitude by the aircraft.
The method of this vigor investigation used jointly the interpretation on the ground and the multispectral viewer's screen and inquired some factors which would influence the vigor of street trees. The authors analyzed and explained the dependence of effect on cause. As a result of this, the vigor could be explained about 70 percents by the waste gas on the structure of city.
Moreover, the authors estimated the future vigor with the date of analysis result and some informations and considered a counterplan.

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This is a report of a photogeological survey, supplemented by the analysis of a summit level map, of the Nishitama area, easternmost part of the Kanto Mountains.
For the interpretation of lithology and structures of the area, the author has prepared a drainage map on a scale of 1: 20, 000 by means of radial intersection method. Maps showing drainage density and its frequency have been compiled from this map, for the purpose of quantitative drainage network analysis. In addition to these, a summit level map, which may represent macro-relief produced by tectonic movements as well as rock-controlled land-forms, has been compiled using topographic maps on a scale of 1: 50, 000.
The photogeological survey of the area, the geology of which consists of Paleozoic and Mesozoic rocks, has been carried out with an aid of these maps and field investigations. The main results obtained by this survey are summarized as follows:
1) From the drainage pattern, the difference in the shape of ridges and vegetation types, the area composed of sandstone, and the area where chert or limestone is intercalated can be distinguished.
2) The NW-SE trending geological structure, predominant in this area, is identified from both the drainage map and the drainage frequency map. It seems probable that the areas of high drainge density and frequency would correspond to the areas where many fractures originated from faults are found.
3) The direction of photographic lineaments and stream courses reflect well the geological structural trend of this area. While photogeologic lineaments coincide with faults, the direction of photogeologic fractures and stream courses, excluding those parallel to the photogeologic lineaments, is presumed to correspond to the strike of strata or joints.
4) The summit level map is useful for the analysis of geological structures.

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