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I am trying to run a raster calcuatlor but it failed. I believe there is a word that ArcGIS 10 does not understand resolution. Maybe there is a word that needs to be interchangable for this ?

I took the equation from this sheet USLE from North Carolina State University

and check on 2.3 for ArcGIS 8.1, ArcMap

Here is what I put the code here :

Power (("flowaccNW") * resolution/22.1, 0.6) * Power(Sin("slope_degnw") * 0.01745) / 0.09, 1.3

I am using ArcGIS 10 SP4 using the Map Algebra's raster calcuator.

Thanks

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If you look at the equation and it says "resolution" I took that from the sheet and ran with it and it failed. The ArcGIS said resolution does not defined. It made me think that ArcGIS does not understand, so I instead put down 10 as it is the DEM with 10 m. Get it ? – PROBERT Dec 5 '12 at 20:21

1 Answer

up vote 3 down vote accepted

type your resolution of raster not "resolution" . also don't type +*/= by keyboard . use raster calculator buttons . resolution of your raster :

  1. right click your raster. click properties
  2. go to source tab .
  3. cellsize(x,y) is your resolution enter image description here
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It will not work, wetland. – PROBERT Dec 5 '12 at 20:25
your second power must have two parameters – wetland Dec 5 '12 at 20:35
see second power parentheses – wetland Dec 5 '12 at 20:37
like this 10,10 ? – PROBERT Dec 5 '12 at 20:37
I try this and it's work : Power("stream" * 10 / 22.1,0.6) * Power(Sin("slope") * 0.01745 / 0.09,1.3) – wetland Dec 5 '12 at 20:38
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