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210 Stony ground
Stony or rocky ground which affects going should be shown on the map. The dots should be randomly distributed with density according to the amount of rock. A minimum of three dots should be used.
Dot diameter 0.16 - 0.2mm, random dot spacing, density to represent amount of rock.
Stony or rocky ground which affects going should be shown on the map. The dots should be randomly distributed with density according to the amount of rock. For large areas a screen may be used. Combining with open land and marsh is now permitted.
A single dot of 0.2mm is defined as point symbol 210.0, can be drawn with any drawing tool.
The ISOM lays down the permissible combination of screens. These now allow a combination with marsh and open land. See the combinations topic for details.
Stony ground is allowed with marsh, open land indistinct marsh, open land with scattered trees, rough open land, rough open land with scattered trees, forest: slow running, undergrowth: slow running, forest: difficult to run, undergrowth: difficult to run, and vegetation: very difficult to run,
but not with broken ground, or uncrossable marsh.
Define replacement dot symbols of 0.16mm, 0.18mm & 0.2mm to allow a variable pattern.
It is difficult to see the variation in these size dots, so a good short cut is to define one symbol of the three sizes together.
Drag the new combination symbol as you draw to create a random effect.
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