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Can you use the path feature to better highlight a shoreline around sections of this basin, or are there too few reference points.

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I haven't been able to find enough reference points to make a reliable shoreline. Maybe by creating a polygon and extending it upward based upon the placemarked shorelines, you could create a likely shoreline. A project worth contemplating

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The ripples are fascinating. I added a couple of USGS overlays to show where they seem to begin. Hydrologically the start and endpoints are of interest to explain.

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I used NASA WorldWind and it's ability to exaggerate topography to a greater degree than GE and took some screen captures.


Looking upstream (North) you can see that the ripples start as the water exits the valley to the north and enters the Camas Prairie Basin.


Looking South, you can see that the water had to create another lake here as its progress into the valley beyond was restricted by another pass. Perhaps the initial filling of the temporary lake caused the ripples. As the lake filled and the water got deeper the ripple-forming process halted.