#NTF System: 2°20’14.025″ – The National Geographic Institute, in its #NTF system, has adopted a slightly different value: 2°20’14.025.”

This is the angle that was once used on IGN maps. For example, map VIII-14 at a scale of 1:50,000, published in 1969, defines its western and eastern edges at longitudes 6.20 gr (3°14’34”) and 5.80 gr (2°52’58”). –

#NTF System: 2°20’14.025″ – The National Geographic Institute, in its #NTF system, has adopted a slightly different value: 2°20’14.025.”