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NOAA-OWP / inundation-mapping

Flood inundation mapping and evaluation software configured to work with U.S. National Water Model.
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[13pt] Leveed area is so large/long that it is masking too many branches #1124

Open CarsonPruitt-NOAA opened 2 months ago

CarsonPruitt-NOAA commented 2 months ago

The leveed area at CAXM7 is masking all FIM products. The leveed area is so long that it is applied to a stream that is not supposed to be masked.

Please see this vlab ticket for details https://vlab.noaa.gov/redmine/issues/124281

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mluck commented 2 months ago

In the image below, the levee in red (other levees in black) is seen as protecting against multiple levelpaths, the mainstem (purple line) and a tributary (green line), so the levee-protected area (dotted area) behind the red levee is masked from those branches.

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Closer inspection reveals that the green levelpath doesn't actually cross the red levee but flows around it. This allows for some additional logic to unmask levelpaths from being associated with a levee if they don't cross the levee but they do intersect the leveed area. The image below shows the effect of this change:

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There is now inundation along the green levelpath that previously had no inundation (see initial issue):

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