A Rules for Foot Orienteering Events - Orienteering USA

C.13.2 If possible, the organizer shall put on a model event to demonstrate the terrain
type, map quality, different types of tracks, control set-up, refreshment points and
marked routes.
C.13.3 When maps are available it should be possible to order, in advance, maps of
terrain similar to that of the event. If and only if the competition map has
previously been used at a public meet it shall be made available for inspection and
when possible advance purchase. (Section forbids the distribution of a new
unused map prior to the event.)
C.13.4 The organizer may charge a reasonable fee for maps and training.
C.14 Terrain
C.14.1 Ski-O competitions shall primarily be held in terrain unknown to the competitors.
In the terrain there shall be several route choice options following tracks when
possible.
C.15 Maps
C.15.1 Symbols shall conform to the International Specification for Orienteering Maps
(ISOM). Deviant or additional symbols necessary because of local conditions are
permissible, but they shall be published beforehand in the Event Information.
C.15.2 Maps shall be in color.
C.15.3 Map scale can be in the range of 1:4,000 to 1:15,000. It is recommended that the
scale of sprint race be from 1:4,000 to 1:5,000.
C.15.4 Contour intervals can be from 3 meters to 10 meters.
C.15.5 Course markings on the map shall follow the ISOM.
C.15.6 For Ski Orienteering the marker control number is printed on the map, next to
each circle designating a control or in a table on the map. No description sheet is
required since the control descriptions are very simple (e.g. trail junction, bend of
trail) and can be determined just from looking at the map.
C.15.7 Mandatory one-way travel on some or all ski tracks should be indicated on the
map with directional arrows on or beside the track(s) affected.
C.15.8 Competitors who cannot properly see the color used to mark their maps may have
their courses redrawn in a color they can properly see by making their request to a
registration official.
C.15.9 Additional overprinting for denoting passability
C.15.9.1 All skiing tracks shall be indicated on the map. Other features which represent
skiable routes (such as roads and paths) are assumed to be passable if not
indicated otherwise on the map or in Event Information.