See Also...539 206
ISOM Index Man-made features index
Cairn, memorial stone or boundary stone (or a trigonometric point in some countries) more than 0.5 m high.
Line width 0.16mm
Dot diameter 0.8mm & 0.14mm
ISOM 1990 Definition
Cairn, memorial stone or boundary stone (or a trig. point in some countries) more than 0.5 m high.
Line width 0.175mm
Dot diameter 1.0mm & 0.175mm
ISOM number changed from 539 to 537.
Defined as line symbol 537.0. A point symbol can be drawn with any tool.
Pictorial Descriptions- BOF Rules, Appendix One
Marker stone: a boundary stone, memorial or trig. point.
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Revised 28 December 1999, 23 March 2000