Using ASTER DEM, I have created Flow Accumulation. However, to create stream order, I was asked to input flow accumultation and stream raster. But I cannot find how to get the stream raster. Some forums say that I should threshold flow accumulation. How do I do this? Please guide me in the right direction.

I am using ArcGIS 10.


As you are using ArcGIS 10, search the help for the topic Identifying stream networks. As you'll discover you need to use the CON tool.


The help file entries for Hydrologic Analysis are very good, and lead you step-by-step through the processes needed to create your stream network in ArcGIS.

If you follow these steps in order you should find the answer you're looking for.


How To extract streams and define basins From ASTER.


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  • Please add some context. Link only answers end up expiring and becoming useless over time. – MaryBeth Aug 17 '16 at 13:46

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