Zonal Statistics values are different then Statistics in info for my raster

Question

Hi,

I have a raster that when I open it says it goes from 441 to 474, their values. I want to know the sum of the values in that raster, and when I use both zonal statistics or raster layer statistics to see the sum, the min and maximum it gives me is 166 till 621, so I am not sure what happens there and if I can even trust that sum they give me. Anyone can help? Thanks!

DavidPike · Answer

The layer statistics are calculated from a sample with a skip factor.  It's possibly these values have been skipped.  I would use the calculate statistics tool with a value of 1.  That will update the dataset properties and then you can properly compare.

David_Brooks · Answer

@DéboraFanzeres and have you built raster statistics on the raster dataset itself? it might be that the 441-474 values are an estimate

DanPatterson · Answer

how is your zone or zones defined? and doe the raster extent and zonal extents match?

How zonal statistics tools work—ArcGIS Pro | Documentation