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601 Magnetic north line

ISOM 2017-2
601 Magnetic north line (ISOM 2017-2)

Geometry: line.


Magnetic north lines are lines placed on the map pointing to magnetic north, parallel to the sides of the paper. Their spacing on the map shall be 20 mm on the map which represents 300 m on the ground at the scale of 1:15 000.
If the map is enlarged to 1:10 000, the spacing of the lines will be 30 mm on the map.
North lines shall be broken to improve the legibility of the map, for instance where they would obscure small features. In areas with very few water features, blue lines may be used.


Colour: black or blue


The definition of this map symbol was updated on 23.01.2022: Line width of blue line: 0.18 –> 0.12 mm.