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Pourquoi les points de déversement se déplacent-ils ?

DaveSimpson

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J'utilise l'outil de bassin versant en ligne pour identifier les bassins versants. Cela fonctionne très bien, mais mes points de déversement sont décalés par rapport à l'endroit où je les ai sélectionnés. Pourquoi les points de déversement se déplacent-ils, est-ce que j'ai manqué quelque chose ?<\/P><\/BODY><\/HTML>

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Water Resources

Accepted answers

DaveSimpson

OK, I figured it out. I used a snap distance of 30 which is the resolution of the data source I selected.

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DaveSimpson

OK, I figured it out. I used a snap distance of 30 which is the resolution of the data source I selected.

SepheFox

To be more specific, "The service will move points to be optimally located relative to the flows in the elevation model if they are not already there." You want the pour points to be on the nearest point of highest floe, or you will end up with tiny little watersheds.

SepheFox

I'm guessing it's because you have the Return Snapped Pour Points box checked.

DanielStauning

Dave,

I would explore the snap distance parameters in the tool, here is the documentation: It should snap to the cell of highest accumulated flow and move the pour point to that location.

Watershed—ArcGIS REST API: Elevation Analysis services | ArcGIS for Developers

Thanks,

-Dan

DaveSimpson

Sorry, it is the arcgis on hydro.arcgis,com tool. See screenshot below. You can see the offset of the pour points in the lower left.

image002.jpg

image001.png

IanMurray

Could you be a little more specific about what online tool you are using? A link would be helpful....

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