I currently have a vector shapefile of Vulcan CO2 emission data that is comprised of many 10km by 10km squares each with a value for emissions for that area. I would like to split each of the 10km by 10km squares into smaller 2.5km by 2.5km squares, but have each square retain the value of the larger square that it was associated with. What would be the best way to do this? Thanks in advance. Kevin.