215 Trench

Geometry: line.

Definition

Rocky or artificial trench.

Shorter trenches may be exaggerated to the minimum graphical dimension.

Impassable trenches shall be represented using symbol Impassable cliff (201).

Collapsed and easily crossable trenches should be mapped as Erosion gullies (107, 108).

Parameters

Minimum depth should be 1 m.

Minimum length: 1 mm (footprint 15 m).

Colour: black.