Creates a raster of ecoregion codes per pixel.
Unlike ecoregionProducer, this fills the raster with pixel information contained in
pixelCohortData.
makeEcoregionMap(ecoregionFiles, pixelCohortData)A list with two objects: the ecoregionMap and a table summarizing
its information per pixelID.
The full cohortData data.table
A raster with ecoregion codes.