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| [[Image:River Reach Att.jpg|thumb|275 px|''River Reach Attributes'' dialog]]
| | #redirect [[SMS:1D Hyd Centerline Coverage]] |
| A centerline arc provides the backbone of the hydraulic model definition. It's direction should be from upstream to downstream. This automatically defines which is the left bank and which is the right bank.
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| Cross sections arcs identify the cross section stations in the hydraulic model, and can also be used to automatically cut a cross section from an underlying digital terrain model.
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| A centerline and cross sections have attributes as defined in the ''River Reach Attributes'' dialog.
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| This dialog contains the following:
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| * Arc Type – sets if the attributes are for a centerline or cross section arc.
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| * River Name
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| * Reach Id
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| * Reach Name
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| * Computational Length
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| ** Reset
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| * Feature Length
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| * Start Station
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| * End Station
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| ==Related Topics==
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| *[[SMS:1D Hyd Cross-Section Coverage|1D Hyd Cross-Section Coverage]]
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| *[[SMS:1D River Conceptual Model|1D River Conceptual Model]]
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| *[[WMS:1D-HYD Centerline Coverage Type|WMS 1D-HYD Centerline Coverage Type]]
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| {{Navbox SMS}}
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| [[Category:SMS Dialogs]]
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| {{stub}}
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