Create new raster from raster and polygon layer inputs

Discussion created by rasilva on Jan 11, 2012

I have a raster with a 0.008 cell size and a polygon layer with data at country-level. I need to create a new raster (with the same grid) obtained by multiplying the data in the original raster by one field in the polygon layer and dividing by the area of the grid cells.

I've tried starting by converting the polygon layer to a raster with a smaller cell size and ressample it to the correct size, but the cells don't match those of the original raster. I've also looked into the overlay tools, but couldn't find an appropriate one.

Any ideas about how to proceed will be much appreciated.