纵坡度路线在一定的长度向上升了多少,称为“上坡”,或称“正坡”;降低了多少称为“下坡”,或称“负坡”。通常我们在图上用“+”的符号表示正坡,“-”的符号表示负坡。坡度正负的决定是以路线的前进方向为准。坡度的大小用百分率(%)表出,例如:路线在一百公尺的长度上升了6公尺,就写作+6%;下降了3公尺就写作-3%。 Longitudinal course in a certain length up to how much, known as “uphill”, or “positive slope”; reduced how much is called “downhill”, or “negative slope.” Normally we use the symbol “+” on the map to indicate positive slopes, and the symbol “-” to indicate negative slopes. The decision of the grade of slope is based on the direction of the course. The size of the slope is shown as a percentage (%), for example: a + 6% increase in the course of a 100-meter length by 6 meters; a -3% decrease in writing-3%.