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ISOM 2000 - 3

MAP SPECIFICATION FOR FOOT ORIENTEERING

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

3.1 Scale

Title was 'Scale and vertical interval' The scale for an orienteering map is 1:15000. Terrain that cannot be fieldworked at a scale of 1:7500 and legibly presented at a scale of 1:15 000, is not suitable for international foot-orienteering.

Maps at 1:10 000 may be produced for relay and short distance competitions. The scale 1:10 000 is recommended for older age groups (45 and above) where reading fine lines and small symbols may cause problems or for younger age groups (age classes 16 and below) where the capacity of reading complex maps is not fully developed.

Maps at 1:10 000 must be drawn with lines, line screens and symbol dimensions 50% greater than those used for 1:15 000 maps.

Where practical the same dot screens as used at 1:15 000 will give the most legible map and are therefore to be preferred.

In education there is usually a progression of scales from 1:2 500 to 1:5 000 to 1:10 000. Maps at very large scales such as 1:2 500 will clearly contain additional detail such as playground equipment. Line dimensions for these maps should also be enlarged by 50%.

Other scales may be produced for other forms of orienteering.

For practical reasons a map should not be larger than is necessary for the orienteering competition. Maps larger than A3 should be avoided.

Notes

Text that is new or revised from ISOM1990 is shown in maroon type.

Where text has been removed or significantly altered from ISOM1990 this symbol appears in the text, clicking on the symbol will jump to the section below on this page with the details of this amended text.

Changes from ISOM1990

Title was 'Scale and vertical interval'

Text in ISOM1990 was: - "The scale for an orienteering map is 1:15000 with 5m contour interval. In flat terrain a contour interval of 2.5m may be used.

Further information on this subject was in ISOM1990 3.4 "Larger scale maps"

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International Specification for Orienteering Maps produced by the International Orienteering Federation
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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