Data Series 412
U.S. GEOLOGICAL SURVEY
Data Series 412
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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