So maybe just another day to finish the masks then as per usual we spit out the tiles to load back into Qgis to draw the maps straight onto. And that's for 1978. I feel sure there will be older imagery available, so if 1960s or even 1950s comes out later on, I will do another generation, but I am not going to do multiple generations for such a large area as I have for a small number of station.