I am looking for a raster in WGS84 where all the countries in the world are available. This raster, in principle, should change the resolution of the pixel at the equator or the poles. The resolution should change as the earth is not planar.
What I am trying to do is multiply a raster that I have with 1) all the protected areas in the world, 2) where other protected areas should be. By multiplying these rasters I intend to obtain the area per country.