Failing at using 'Zonal Statistics As Table' to calculate the number of pixels per class, for each individual area (19 total) of a classified raster

Question

I am using ArcGIS Pro 10.2.9.

I have a raster. I used a polygon feature class (19 rows of data) to clip the raster into 19 distinct areas, some of which abut each other. I classified the clipped raster into three classes.

Now I want to calculate the number of pixels per class, for each of the areas/zones.

Integerizing the raster produces an associated attribute table that tells me the total number of pixels for each class, but for the entire raster and not by zone.

I tried using Zonal Statistics As Table, but I get pixel counts per zone, and not by class within each zone.

The table I expect could be 57 rows, three rows per zone for each class with a pixel count column; or 19 rows, with at least three columns referring to pixel counts for each class (px_count_class1, px_count_class2, px_count_class3).

Answer 1

As suggested by Michael Stimson, 'Tabulate Area' was the appropriate tool for my task.

I could not use my original classified raster, but needed to first use 'Int' to integerize it. My feature zone data contained 19 polygon features (most singlepart, some multipart), with my 'SITE' variable as the zone field. I originally used these features to clip my raster before classifying it. The data with my classes was the integerized, classified raster, with 'Value' as my Class field. Because I planned to create a bar plot from the resulting data, I wanted long form data, so checked 'Classes as rows in output table'. My output was a table with a 'ZONE_CODE' for each site (referring to each of the 19 polygon features), the value of each class, pixel count, and area which is pixel count multiplied by spatial resolution (0.6m x 0.6m).

I forgot I had increased the size of some of my polygons, so the '255' is unspecified class, or the portion of the slightly larger polygon not filled by the raster. To avoid this, use the version of polygon feature used to originally clip the raster.