Hello,
I am using the Hydrology tools in ArcGIS Pro to delineate urban watersheds in Kolkata. I have noticed that when I use the Flow Direction tool, some of the values of the Hooghly River (alternatively spelled Hoogli or Hugli) are coded to point north (value of 64). The river winds it way southward until it reaches the Bay of Bengal, however, so the map is not accurate. I have attached an image to show these results.
I am using 30-m resolution because I am unable to purchase higher resolution data at this time. This may be the reason for the inaccurate results.
Is there a way to re-code this information so that the flow direction raster is accurate for the Hooghly River?
Thank you!
-Jamie