Hi,
I have a DTM (8x8 resolution) and I would obtain a smoother surface. Which type of tool could I use in ArcGIS 10.1?
I watched some tutorial about the focal statistics tool, yet I didn't understand if it's suitable for me.
Thanks
A focal mean takes the average values around a cell... effectively it smooths out cell-by-cell differences. The degree of smoothing can be controlled by the window size. Normally a 3x3 rectangle is used, but 5x5 or 7x7 are used.
Sometimes, the smoothing by focal statistics is not enough and you have to redo the interpolation from scratch using something like a Spline Interpolator. I wouldn't use smoothed data for much other than viewing (visualization) purposes should you go that route.
Thank you Dan
Roberto, the input type doesn't matter.. a mean is a mean.
With a larger rectangle (kernel) it tends to get smoother. Check the help topics.... or better still... run a couple of samples with 3x3, 5x5, 7x7 windows and see what I mean
Thank you, Dan... sorry for the question, maybe silly, yet is it work also with the slope in percentage or it has to be in degrees? Moreover, if I chose instead of 3x3 a rectangle 5x5 or 7x7, what would it change? I mean, just the size or I could see a more significant smoothing result. I am asking to you because I didn't find on internet a specific info about this.
Thank you
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