A Method of Calculating the Initial Probability of Geomorphic Unit Lines Using Digital Elevation Model
A technology of digital elevation model and unit line, which is applied in calculation, 3D modeling, image data processing, etc., can solve problems such as limiting the application of instantaneous unit line of landform, inability to obtain accuracy, unfavorable development of instantaneous unit line of landform, etc., and achieve data source Stable and reliable, objective and reasonable results, high calculation efficiency
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[0065] The present invention will be further described below in conjunction with the accompanying drawings and specific embodiments.
[0066] Such as Figure 1 to Figure 9 As shown, a kind of method that the present invention provides based on digital elevation model calculates the initial probability of topographic unit line, comprises the following steps:
[0067] S1. Using the topographic information system software ArcGIS to build a geoprocessing workflow such as figure 2 , to extract the digital elevation model (DEM) raster data of the target watershed such as image 3 , which includes:
[0068] 1) Filling, to obtain the grid Fill after filling;
[0069] 2) Calculate the flow direction to obtain the flow direction grid Dir;
[0070] 3) Calculate the confluence flow to obtain the cumulative flow grid Acc;
[0071] 4) Determine the StationPiont, the outlet station of the watershed;
[0072] 5) Extract the target watershed AimWatershed;
[0073] S2. Using the DEM dat...
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