topic Is there a tool already created that will calculate the total area for each pixel value in a raster that falls within each zone in an overlayed poygon? in Spatial Statistics Questions

Is there a tool already created that will calculate the total area for each pixel value in a raster that falls within each zone in an overlayed poygon?

Syvertson — Wed, 09 Mar 2016 15:54:43 GMT

I am about to create a model to do this, but before I go and do that I want to be sure whether this exists already.

I need to find out the area of each pixel value from a raster within a zone from a polygon overlayed. The closest I have found to this so far is the "zonal statistics" tool in the ESRI Spatial Analyst Toolbox. Ultimately, I would like to join the table to the original polygon zone layer to add these values as attributes of the zone.

Thanks in advance,

Matt Syvertson

msyvertson@co.richland.nd.us

Re: Is there a tool already created that will calculate the total area for each pixel value in a raster that falls within each zone in an overlayed poygon?

DanPatterson_Retired — Wed, 09 Mar 2016 16:10:43 GMT

Zonal Statistics as Table—Help | ArcGIS for Desktop

cell area is cell width*cell height. Area is cell area * cell count

Re: Is there a tool already created that will calculate the total area for each pixel value in a raster that falls within each zone in an overlayed poygon?

Syvertson — Wed, 09 Mar 2016 16:19:34 GMT

I might not have been clear about what I am trying to do, so I will use an example. Lets say I have a polygon layer which has all counties in the state, and I have a raster layer in which each pixel has a value range of 1-5. I would like to overlay the two and receive a table with the columns county,1,2,3,4, and 5. So for each line, I would like the county name, the area of value one in that county, the area of value 2 in the county, etc...

Re: Is there a tool already created that will calculate the total area for each pixel value in a raster that falls within each zone in an overlayed poygon?

DarrenWiens2 — Wed, 09 Mar 2016 17:28:28 GMT

I think you're looking for Tabulate Area, using a county feature layer as the zone input.

Re: Is there a tool already created that will calculate the total area for each pixel value in a raster that falls within each zone in an overlayed poygon?

Syvertson — Wed, 09 Mar 2016 18:42:34 GMT

Thanks Darren. That worked perfectly.