index contour 中文意思是什麼
index contour
解釋
標注等高線-
The calculation method of ln ( / tan # ) index widely used is the multiple flow direction algorithm developed by quinn et al. it can been seen that, in the algorithm, the contour length normal to the direction of flow flowing out the current cell is used to determine both a and tan #, and that the calculated total cumulative contributing area of downslide grid cell does not include the area of the current cell
目前普遍使用的計算該地形指數的方法為多流向法。方法中計算和tan用的均是與流出單元網格流向垂直的等高線長。另外計算下坡單元網格累積匯流面積時沒有考慮欲計算ln （ tan ）值的單元網格的面積，這些是不合理的。 -
Topmodel is based on the calculation of ln ( / tan # ) index and its distribution. in terms of a dem, a is the cumulative upslope area draining through per contour length to a pixel, which reflects the tendency of water to accumulate at any point in the catchment, tan # is the local slope angle of the cell, which reflects the tendency for gravitational forces to move that water downslide
Topmodel是以計算ln （ tan ）指數及其分佈為基礎的。對于柵格dem ，為上坡區域通過單位等高線長匯集到單元網格內的面積，反映徑流在流域中任一點的累積趨勢， tan為單元網格的坡度，反映重力使徑流順坡移動的趨勢。
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