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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.

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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.

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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.

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How To extract streams and define basins From ASTER.

https://www.youtube.com/watch?v=5T64dpFrZ2Y

We're looking for long answers that provide some explanation and context. Don't just give a one-line answer; explain why your answer is right, ideally with citations. Answers that don't include explanations may be removed.

  • 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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