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(一)设平原农区某乡南北长略为东西宽的1.5倍,实测林网化面积(S)为31500亩(21平方公里),林带总长(L)为115.5公里,林网主副林带间距大体为2:3。推算其网格面积(Si)可用下式:
(1) The length of the north-south plain in a plain farmland is 1.5 times as wide as the east-west width. The actual measured forest net area (S) is 31500 mu (21 square kilometers) and the total length of forest belt (L) is 115.5 kilometers. Roughly 2: 3. Calculate the grid area (Si) can be used the following formula: