Height difference between two points in relation to their horizontal distance, given in per cent (%) or degrees (°). The angle of inclination results from the ratio of the difference in height to the horizontal distance. Mathematically, the function "arcus tangens" is used for this. An upward slope is called an incline, a downward slope is called a decline. Both terms describe the same geometric relationship; they differ only in the direction of view and language used. Significant slopes are:

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Egon Mark
Diplom-Sommelier, Weinakademiker und Weinberater, Volders (Österreich)