I am trying to create a TPI from a DEM tiff file in SAGA but keep getting the following result:
I'm just not sure what I'm doing wrong.
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I think the problem may be in your value range. Try restreining it to a more reasonnable range to "see" something.Check in the description TAB to get the min/max of the pixel values and/or check the histogramm. You'll see if your problem is in the visualisation of your data or if it's elsewhere. I'll edit my answer when i have more info. You should get things like the following in the description TAB :
Value Minimum 1 Value Maximum 949 Value Range 948 No Data Value -32767 Arithmetic Mean 456.3380409647518 Standard Deviation 181.1010906092993