topic Re: How to calculate sum pixel value from raster file? in ArcGIS Spatial Analyst Questions

How to calculate sum pixel value from raster file?

RupsaBhowmick — Mon, 26 Jun 2017 21:02:09 GMT

I have one raster file of aerosol data and one shape file with state boundaries. I need to calculate the sum of aerosol pixel values for each state. Please let me know how to calculate sum pixel value for each state? Also do I need to clip or join the raster and shapefile before calculating the pixel value? Regards,Rupsa

Re: How to calculate sum pixel value from raster file?

XanderBakker — Mon, 26 Jun 2017 21:06:11 GMT

This can be achieved using the Zonal Statistics as Table—Help | ArcGIS Desktop . The tool will be able to perform statistics over a raster for each polygon and store the result in a table. Use the SUM option (or ALL is you want to have more detail).

Re: How to calculate sum pixel value from raster file?

RupsaBhowmick — Mon, 26 Jun 2017 21:50:57 GMT

Thank you so much for the explanation. When I calculate the zonal statistics as table on my raster file, it gives me the sum of each pixel value. But I also need the sum of the pixel value of each states of a country. How to get that sum of pixel value of each state?

Re: How to calculate sum pixel value from raster file?

XanderBakker — Mon, 26 Jun 2017 21:54:02 GMT

The states featuresclass should be used as "zone" raster or featureclass in the Zonal Statistics as Table—Help | ArcGIS Desktop tool. This will calculate the sum of the raster values for each zone (in this case for each state).