一、等值线图上高、低值区域的判读方法1.垂线法(以等高线为例)在等值线图上弯曲最大处两侧作等值线的垂线,方向是从高值指向低值,若箭头向中心辐合,则为低值区(等高线图上为山谷);若箭头向外围辐散,则为高值区(等高线图上为山脊)。 First, the interpretation of the high and low value regions on the isoline diagram 1. The vertical line method (using contour lines as an example) The vertical line of the isoline is drawn on both sides of the maximum point of the contour plot. The direction is from The high value points to a low value, and if the arrow converges toward the center, it is a low value area (a valley on the contour map); if the arrow diverges to the periphery, it is a high value area (a ridge on the contour map).