Control description categories: Column C | Column D (Landforms; Rock and boulders; Water and marsh; Vegetation; Man-made features; Special items) | Column E | Column F | Column G | Column H | Special instructions
Column D indicates the feature on which the control flag is placed. These are cross-referenced
to the ISOM 2017-2 (International Specification for Orienteering Maps) and ISSprOM 2019-2
(International Specification for Sprint Orienteering Maps) symbol or symbols used to represent
them (which are generally harmonised). Note that where a number is given it includes all symbols
beginning with that number (e.g. 509 indicates 509.1 & 509.2).
If a second control feature is required (i.e. for crossing; junction; between) then this must go in
column E. It is not permitted to place two symbols in Column D.
Vegetation (ISOM / ISSprOM section 3.4)
| Ref. | Symbol | Name | Description | ISOM/ ISSprOM |
|---|---|---|---|---|
| 4.1 |  | OPEN LAND | An area with no trees. Grassland, a meadow or a field. Also heath or moorland. Used with symbol 8.8 to indicate open sandy ground. | 213 401 403 412 413 414 |
| 4.2 |  | SEMI-OPEN LAND | An area of open land with scattered trees or bushes. | 402 404 |
| 4.3 |  | FOREST CORNER | The corner or tip of a forested area projecting into open land. | 405 406 408 410 |
| 4.4 |  | CLEARING | A small area of land free from trees within the forest. | 401 403 |
| 4.5 |  | THICKET | A small area of forest where the tree cover or undergrowth is so dense that it is difficult to pass. May also be used for an individual bush. | 406 408 410 411 418 |
| 4.6 |  | LINEAR THICKET | A man-made line of trees or bushes that is difficult to cross. May also be used for a hedge. | 410 411 |
| 4.7 |  | VEGETATION BOUNDARY | A distinct boundary between different types of trees or vegetation. | 415 416 |
| 4.8 |  | COPSE | A small area of trees in open ground or a more runnable area of trees surrounded by thicker forest. | 405 406 408 410 |
| 4.9 |  | PROMINENT TREE | An unusual or prominent tree in either open land or forest; frequently information is also given as to its type. | 417 418 |
| 4.10 |  | PROMINENT VEGETATION FEATURE. E.G. ROOT STOCK, TREE STUMP | The upturned root of a fallen tree, with or without the trunk. The stump of a tree. | 419 |