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Rock and boulders

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This page contains content from ISOM2000   This page contains content from Ashby Mapping    revision 01/00

Rock is a special category of land form. The inclusion of rock gives useful information about danger and runnability as well as providing features for map reading and control points. Rock is shown in black to distinguish it from land forms features. (Removed, was in 1990 ISOM - The outline of the symbol should accurately represent the shape of the rock face projected on a horizontal plane.) Care must be taken to make sure that rock features such as cliffs agree with the shape and fall of the ground shown by contours or form lines.

Impassable cliff
Rock pillars/cliffs
Passable rock face
Rocky pit
Cave
Boulder
Large boulder
Boulder field
Boulder cluster
Stony ground
Open sandy ground
Bare rock



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International Specification for Orienteering Maps produced by the International Orienteering Federation
OCAD produced by Hans Steinegger Software. 1988-1999 Hans Steinegger. OCAD is a registered trademark of Hans Steinegger
This document has been written and coded by Peter Hornsby of Ashby Mapping
Apologies for any mistakes and errors; please inform details of any problems, thanks.
Produced for the Ashby Mapping internet site on 20 November 1997 and 1 December 1999  1997-2000 Ashby Mapping
Revised 28 December 1999, 23 March 2000