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.
Landforms (ISOM / ISSprOM section 3.1)
| Ref. | Symbol | Name | Description | ISOM/ ISSprOM |
|---|---|---|---|---|
| 1.1 |  | TERRACE | A level area on a slope. | 101 102 103 |
| 1.2 |  | SPUR | A contour projection or “nose” rising from the surrounding ground. | 101 102 103 |
| 1.3 |  | RE-ENTRANT | A contour indentation; a valley; the opposite of a spur. | 101 102 103 |
| 1.4 |  | EARTH BANK | An abrupt change in ground level which can clearly be distinguished from its surroundings. | 104 |
| 1.5 |  | QUARRY | Gravel, sand or stone working in flat or inclined ground. | 104 |
| 1.6 |  | EARTH WALL | A narrow wall of earth projecting above the surrounding terrain; may be partially stone faced, usually man-made. | 105 106 |
| 1.7 |  | EROSION GULLY | An erosion gully or trench, normally dry. | 107 |
| 1.8 |  | SMALL EROSION GULLY | A small erosion gully or trench, normally dry. | 108 |
| 1.9 |  | HILL | A high point. Shown on the map with contour lines. | 101 102 103 |
| 1.10 |  | KNOLL | A small obvious mound or knoll. | 109 110 |
| 1.11 |  | SADDLE | The low point between two higher points. | 101 102 103 |
| 1.12 |  | DEPRESSION | A depression or hollow from which the ground rises on all sides. Shown on the map with contour lines. | 101 102 103 |
| 1.13 |  | SMALL DEPRESSION | A small, shallow, natural depression or hollow from which the ground rises on all sides. | 111 |
| 1.14 |  | PIT | A pit or hole with distinct steep-sides. Usually man made. Used with symbol 8.6 to indicate a rocky pit. | 112 203 |
| 1.15 |  | BROKEN GROUND | Clearly disturbed ground with features too small or too numerous to be mapped individually; including animal earths. | 113 114 |
| 1.16 |  | ANT HILL | The mound made by ants or termites. | 115 |