Another cruder method is to take the intersection between the line of latitude midway between the most northerly and southerly points on the Scottish mainland, and the line of longitude midway between the most easterly and westerly points. In the days when Corrachadh Mòr in Ardnamurchan was undisputedly the most westerly point, this also produced 56 degrees 39 minutes N, 4 degrees 0 minutes W, very near the summit of Schiehallion.