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High stone wall 521

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This page contains content from ISOM2000   This page contains content from Ashby Mapping  Ski-O symbol  Mountain Bike-O symbol  revision 05/00


521 High stone wall

A stone wall higher than ca 1.5m, not crossable to the average orienteer.

Colour: black.

Line width 0.18mm

Dot diameter 0.4mm, spacings 2.5mm & 0.6mm

ISOM 1990 Definition

As ISOM 2000 but line width was 0.175mm
ISOM number changed from 522 to 521.

OCAD Methods

Defined as line symbol 521.0. Can be drawn with any tool but bézier mode is preferable.

If the bézier tool is used, care must be taken as dot spacings are dependent on location of nodes and handles. The smaller dot gap is particularly vulnerable to the effects of tight curves on the spacing. See bézier topic for more information.

Drawing Considerations

All crossing points (gates, stiles and gaps) must be shown; if they are not to be used on the day of the competition, then this is indicated on the overprint, map corrections or on the ground, as appropriate.

Pictorial Descriptions

- BOF Rules, Appendix One

a stone boundary.

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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