不规则地形表面积的测算方法应用

探讨一种应用于园林工程的不规则地形表面积的测算方法.其法用四个不同方向的等间距的平行线被等高线分割的不规则地形平面图,将不同方向平行线被山脚线切割出来的线段长度及其被等高线切分的割线数的观测结果按勾股定理换算出弦长,然后采用斜面微分长方形求积分的方法借助casiofx-3600p电算器编程运算得到不规则地形四个方向的面积测算值.结果表明,当园林工程中山的相对高程远小于山的跨度时,此测算方法有利于更客观地纠正因为垂直尺度对人的视觉造成的感受过于强烈而高估山体表面积的倾向.

Application of Measure and Calculation Methods for the Surface Area of Abnormity Topography

The article instructed a simply and utility method of measuring and calculating abnormity topography' s surface area for the application of landscape architecture. By using four group parallel lines with the same distance cut the abnormity topography's plan with contour lines from different direction, the result of hypotenuse's length by parallel line segment's length and cut line's number whichcut by contour lines was calculated according to the Pythagoream theorem. Then the integral of inclined differential rectangle can get four abnormity topography' s surface area by the means of scientific calculator casiofx - 3600p. These surface area's value from four direction was a very near thing, its variance coefficient was only 3.54% . At last use these four area statistical value do parameter s interval estimation can obtain the range of abnormity topography s surface area s true value.