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Standard Slope Function

Learn about the Standard Slope Function Aspect and its application in hydrology. Explore keywords such as Direction of Steepest Descent, Eight Direction Pour Point Model, and ESRI Direction Encoding. Be familiar with the D∞ Algorithm for calculating slope.

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Standard Slope Function

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  1. a b c d e f g h i Standard Slope Function

  2. Aspect – the steepest downslope direction

  3. a b c d e f g h i

  4. 80 80 74 74 63 63 69 69 67 67 56 56 60 60 52 52 48 48 Hydrologic Slope - Direction of Steepest Descent 30 30 Slope: ArcHydro Page 70

  5. 32 64 128 16 1 8 4 2 Eight Direction Pour Point Model ESRI Direction encoding ArcHydro Page 69

  6. The D Algorithm  If 1 is not fit within the triangle the angle is chosen along the steepest edge or diagonal resulting in a slope and direction equivalent to D8

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