Orienteering maps should been drawn according to the International Specification for Orienteering Maps (ISOM). This ensures that different types of terrain around the world are mapped with the same symbols that every orienteer understands.
These specifications are updated from time to time. For example, the specifications for Forest Maps (ISOM 2017) and Sprint Maps (ISSprOM 2019) have recently been revised. Orienteering maps, which were still drawn with symbols of an old specification, can be easily updated to the current specifications in OCAD.
Sometimes it’s tricky to find out which symbol set is the current one or with which symbol set a map was drawn. The wiki page Symbol Set Overview was created for this purpose.
A demonstration how to update a Sprint Map from ISSOM 2007 to ISSprOM 2019 can be seen here.
Until recently, there were many symbol sets for drawing school orienteering maps. Therefore, the IOF Map Commission has been commissioned to produce a simple set of symbols for school maps for scale 1:1000 to 1:2500. The basis for the symbol set for school orienteering maps is the ISSprOM 2019. All symbols of ISSprOM 2019 have been enlarged to 125% and 6 additional symbols have been added (see pictures below).