Trouble generating CNGrid with HEC-GeoHMS

01-07-2019 12:29 PM
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New Contributor

I am following Dr. Merwade's tutorial but am running into troubles creating the Curve Number grid using the HEC-GeoHMS extension in ArcGIS.  Specifically, in the last step of creating the CN Grid, ArcGIS/HEC-GeoHMS produces the layer CNgrid, but there is no attribute table.  Any ideas on what might be going wrong?   I am using ArcMap 10.5.1 with HEC-GeoHMS 10.5 and Arc Hydro 10.5.  Thank you!

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New Contributor II

Grids usually don't have attribute tables.  The values are stored in the cells of the raster.

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