engleski

Aerial Photographs of Forest Trees Details

The aerial photographs showing details of forest trees, e.g. young shoots, leaves, flowers, fruit, twigs and parts of the frunk, partly displayed the forest soil and the plants in the undergrowth layer. Made during the resting period of the vegetation, the photographs showed sprouts, buds, twigs, trunks and the soil. Aerial photographs of details are made with the help of the device consisting of two parts, a launching ramp and a capsule. The ramp serves for launching the capsule vertically up into the air, the highest altitude being 50 m above the ground. The capsule consists of an aerodynamic cupola and a camera, which, upon launching automatially takes photographs of the objects upon the ground. The power of the steel spring is used for launching. It is built in the launching ramp. The device is designed for field work, therefore it is easily transportable, made of light materials, and is of small dimensions. The launching ramp is 180 cm high, 37 cm wide and weighs only 7 kg. The capsule with the camera is 5 cm in diameter, 13 cm long, weighs only 15 dkg. A Leica 35 mm film is used, black and white, color or infrared. Detailed aerial photographs is done without flying objects, just by launching the camera from the ground, each photograph separately. The main characteristics of this method are that the photographs are obtained relatively fast, easily and under favorable conditions. The photographs are compatible with those obtained by other methods. The compatibility is particularly important when special forestry maps are made, since the aerial photographs od details offers additional information when using aerial and satellite photographs of high resultion. Detailed aerial photographs of forest trees is designed for scientific research in forestry. It could be applied in other scientific fields. The best aplication is on permanent experimental plots, where it is possible to take photography from the same spot all the year round, which is suitable for observation of the development of leaves, flowers and fiuit, together with the physiological activity of forest trees, the occurrence of forest pests, etc. The activites going on in the upper spheres of the crown should be seen and observed, as it is there where new development processes start, and where forest stands begin to detiorate.

Aerial Photographs; Forestry; experimental Plots; physiotogical Activity

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