Reducing the terrain to a scale of 1:15 000 requires generalization, for instance: leaving out small features such as very small knolls and clearings or having to exaggerate the widths of paths or size of pits.

It is easier to map all detail however small, but this is wrong, this will often result in an illegible map.

The base map should be at a scale of 1:7 500 regardless of printed scale.