tiffanyduhl

count number of raster cells of different values inside  polygon fishnet

Discussion created by tiffanyduhl on Mar 30, 2011
Latest reply on Dec 7, 2011 by varun123
Hi,

I'm wanting to perform an operation that is similar to running zonal statistics, but I'm working with a raster that contains categorical values, so mean, range, and even variety are not useful to me.  I want to count the number of raster cells of each value within a set of equal-area polygons (my domain grid)... I've seen an older thread that recommends converting said raster into polygons, intersecting with the polygon grid (my "zone" dataset), then running Calculate Areas... but frankly, I'm working with 30-m resolution data and my machine keeps crashing out because this results in hundreds of millions of polygons (even if I don't conform to the original raster cell boundaries).

Does anyone out there know if there's an easier way to do this?

Thanks!
-Tiffany

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