Arc Hydro Terrain Processing

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Arc Hydro Terrain Processing
Exercise 3
Input Data
HydroID Assignment
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HydroID Assignment
Used in this exercise
Unused in this exercise
Catchment HydroID 535 to 654 (120
Catchments) DrainageLine HydroID 655 to 774
(120 Drainage Lines) AdjointCatchment HydroID
775 to 828 (54 Adjoint Catchments) DrainagePoint
HydroID 949 to 1068 (120 Drainage
Points) HydroID is always unique if you create
a feature class and then delete it or overwrite
it, HydroIDs are all assigned new
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HydroID - DrainID
HydroID of Catchment DrainID of DrainageLine
and DrainagePoint
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NextDownID
NextDownID 549
NextDownID 557
NextDownID 549
NextDownID 557
NextDownID of a Catchment is HydroID of next
downstream Catchment
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Tracing by NextDownID
Tracing Downstream
Each catchment has only one downstream catchment
(like a DEM cell)
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Upstream Tracing using Next DownID