Hallo All, I am trying to use the raster calculator to calculate Slope length SL for my RUSLE model. All the necessary layers as inputs have been prepare including flow accumulation, slope in percentage. But when iinput the formula (see attached) and run the map algebra tool i receive an error message. Any ideas where i may be missing it?
drop the LS == that is checking for equality, your output will be named as given in the output line
use sqrt ... not sure if ^0.5 works in all places... but be safe.
why don't you split stuff and do the calculations in baby steps to ensure that each component works?
you can then delete the intermediate steps or combine them into one smokin' one-liner if the pieces work.
PS move this to Spatial Analyst it has nothing to do with coordinate reference systems
Considering the output of the expression in Raster Calculator is Slope Length (LS), you need to do following two steps
1) Delete LS== from the expression. (You do not mention the LHS in the expression here in Raster Calculator)
2) Replace ^ with ** for square operation.
@Dan, i have done it in bits as you suggested and it worked, but i am confused with "sqrt" suggested. below is the equation i am using and m is 0.5, so in fact i used the boolean sign, hope i was right