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Data Series 412

U.S. GEOLOGICAL SURVEY
Data Series 412

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Table 4.Selected data elements stored in the ArcHydro global geodatabase for Idaho.

[Abbreviations: DEM, Digital Elevation Model; HUC, Hydrologic Unit Code]

Data element name Description
hucpoly DEM-derived “synthetic” HUC polygon feature class. These polygons constitute an index to the data tiles. (Note: Recent changes to the 8-digit HUC boundaries are not reflected. This dataset is not a substitute for WBD.)
Streams3D Three-dimensional streams network that ties together the hucpoly polygons.
HUCLongestFlowPath Longest flow path within a hucpoly polygon.
Point3D Points on the Streams3D network that become junctions in the HUC_Net geometric network.
HUC_Net Geometric network composed of Point3D and Streams3D, which ties together the hucpoly polygons.
HUCHasJunction Relationship class that establishes a link between hucpoly and Point3d via the JunctionID field.
HUCPeakFlowRegions Table listing the drainage areas in each region by hucpoly polygon.

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