Flow Direction Raster format

[FarisSquared]

The documentation in the input files mentions that we can generate flow direction from ArcMap and QGIS.

I am using QGIS and GRASS's r.fill.dir, the issue I am facing is that the coding of (agnps) mode is different to the one required in GIStoSWMM.

• 1 in agnps is north
• 1 required in GIStoSWMM is northeast

so, Could you please share with us how you generated the raster?

as a temporary solution, I am writing a quick script to fix my coding. but curious about how to do it because it will simplify the workflow.

Thanks, Faris