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ŠUMARSKI LIST 6-9/1991 str. 93     <-- 93 -->        PDF

LITERATURA


E mro vic, B. (1958): O Christenovom visinomjeru. Šumarski list; str. 194—211.
Holl, F. (1922): Jednostavni visinomjer. Šumarski list; str. 432—435.
Isajev , I. P. (1937): Modifikacija Christenovog visinomjera. Šumarski list; str.


513—517.
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K 1 epac , D. (1966): Blume-Leiss-visinomjer. Šumarsko-tehnički priručnik; str.


169—171. Zagreb.
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list; str. 97—104.
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Lukić , N. (1985): O visinomjeru SUUNTO. Šumarski list; str. 80—83.
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Instruments for Measuring the Tree Heights on Inclined Terrain


Summary


In the work are displayed new methods for correction of tree heights measured
on inclined terrain by hypsometers contrued upon trigonometric principle. The
methods are worked out for the cases of using the vertical and horizontal board
along with a distance-measurer on the instrument.


First solution is realized in the curve-formed nomogram, from which we can
determine the factor for correction based on measured height and inclination.
When we subtract this factor from measured height, we get the real tree height.
The nomogram is applicable instead the correction tables, that are enclosed (fixed)
to all hypsometers that we use in practice.


In the next solution is possible to build the correction-curves into the space
with the scales on the instrument, and to work out the corresponding needle. This
solution enables direct reading the correction-factor for all of heights on single
inclination. It can be realized by adaptation of some types of existing hypso
meters, or working out the new models.