Articles

Method for drawing forest maps by means of an office computer

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Abstract

In  this article, we tried to perform the drawing of forest maps, together with  the calculations involved, automatically by means of relatively simple aids.      The computer unit used is an office computer Olivetti P203. As an example  the growing stock (in m3/ha) was mapped out. The proper inventory in the field is done  according to the classical method by means of a previously fixed network of  squares (70,7 m x 70,7 m), which corresponds to two plots a ha.     The quantity which is measured and mapped out (in this case the growing  stock) is in a similar form not very useful in mapping. Therefore a division  in classes (Ku) numbered from 0 to 9, is set up. An appropriate program  calculates for a certain number of points within this elementary square, to which  class they have to be assigned, whereas the typewriter prints the  corresponding code number on the right place.     Fig. 1 and the formulas (1), (2) and (3) represent the principle o[ the  calculations while fig. 2A and B reproduce the results printed by the  typewriter for a elementary square of respective 1” X 1” and 2” X 2”. The  whole of similar network of squares eventually results in a basical document,  on which the existing forest map with an adapted scale is laid (see appendix  3) and the class limits are drawn.     If desirable, the scale may be adapted when the forest map under discussion  is definitely reproduced.

How to Cite:

Goossens, R. & De Schuyter, J., (1970) “Method for drawing forest maps by means of an office computer”, Silva Gandavensis 22. doi: https://doi.org/10.21825/sg.v22i0.999