采用前方交会法加密图根点:在地形奇峰深谷,山脊山顶平缓、灌木丛生、通视困难地域,图根点采用小三角钻布点方法是有一定困难的,其边长也难达到规范80～300米的要求.经常在同一山脊或山顶上选点,顾此失彼,即前边通视,后边不通视,左边通视,右边不通视.即便通视,则 The use of the front of the intersection method to encrypt the map root point: in the terrain Qifeng deep valleys, ridge ridge gentle, shrubs, visual difficulties, Tugan point using a small triangle drilling point method is a certain difficulty, its length is also difficult to achieve 80 ~ 300 meters. Often in the same ridge or the peak of the election point, so lose one, that is, the front of the TV, the rear is not visible, the left side of the TV, the right is not visible.