Difference between Zonal Statistics and Image Analyst Statistical Means Function?

AlyssaRenteria — Fri, 29 Mar 2024 19:56:22 GMT

I was wondering if anyone knew the difference between the zonal statistics and statistical means function. I have two raster layers that I want to find the average of the corresponding cells and create a new raster layer. What would you choose? Or what questions should I ask myself before choosing either tool?

Re: Difference between Zonal Statistics and Image Analyst Statistical Means Function?

clt_cabq — Fri, 29 Mar 2024 21:05:30 GMT

Zonal statistics calculate the mean of values in one raster according to 'zones' or cells of a given value in another raster. Imagine if you had a value raster where the cells were the count of something, and you had another raster that had been classified in to 3 discrete types of areas. Zonal statistics would calculate the mean in the value raster for each of the 3 types of areas in the zone raster.

For the statistical means - that simply calculates the average of over 2 or more rasters that are overlaid. For what you want to do, I think this is the approach you want to take, and you may want to think about the Focal Statistics which uses a roving window (typically 3x3 cells) around the target cell to calculate the statistic you want. The focal statistics tool can provide a bit of smoothing to a surface, but that may or may not be useful for you.

topic Difference between Zonal Statistics and Image Analyst Statistical Means Function? in ArcGIS Spatial Analyst Questions

Difference between Zonal Statistics and Image Analyst Statistical Means Function?

Re: Difference between Zonal Statistics and Image Analyst Statistical Means Function?