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Wrong output from the NDR model

I am working with NDR model, and i'v got the output map of Nitrogen delivery retio as the picture below shows. i am wondering why there have cells with no data.

Best regards,

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  • RichRich Administrator, NatCap Staff
    Hi, when the NDR model has nodata holes it's sometimes related to poor routing on the DEM underneath.  And that's usually caused by hydrological pits in the DEM.  You can confirm this by looking at the flow accumulation raster generated by the model.  If it looks like the flows break up all over the landscape, that's probably the problem and you'll need to fill the DEM using SAGA or ArcHydro.

    If none of that makes sense, I'm happy to take a look myself if you want to dropbox me your data to
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