DEM projection issues

[Retang Mokua]

Hi Everyone,

I am trying to delineate the catchment boundary. I encounter an error " DEM projections unknown". I have attempted reprojecting the DEM in ArcGIS Pro to WGS84, but the error remains. What could be the problem as the QSWAT project is also in WGS84?

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[Jim Almendinger]

WGS84 is not a projection -- it's the reference ellipsoid (or datum) that approximates the shape of the earth. 

A projection maps the points on that ellipsoid onto a flat surface, and you have many options for doing that.  A Universal Transverse Mercator (UTM) projection for your region is often a good choice. 

-- Jim

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Cheers,

-- Jim

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