There are often parts of forested landcover datasets where the age of the forest is unknown. When this occurs, these areas must be assigned an age. This function assigns ages to these areas based on the average forest age distributions of Natural Subregions in Alberta. These distributions have been shifted such that the minimum age is 80 years, assuming that the areas of unknown age have not been harvested or burned, and therefore are likely to be at least 80 years old.
Details
Note that the dataframe should have all the necessary columns, in order. If the columns are not found, an error will be returned. If they are out of order,the function will try to put them back in the correct order. The correct order for each veg type follows this pattern: PineR, Pine1, ..., Pine8.