In the same region,with reduction of DEM resolution or contraction of topographic map scale,the details of terrain described by DEM and topographic map are abandoned and only framework features are maintained.In this paper,the multi-scale wavelet analysis and Square Root Model is combined to simulate the general process.Firstly,the higher resolution DEM is decomposed into the low frequency and high frequency parts by Multi-scale wavelet.Secondly,according to the theory of Square Root Model,the threshold of ...
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