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A fine line marking a cut watercourse.
Also known as: Field drain symbol, Dyke map marking, Cut watercourse symbol
On a topographic map a drainage ditch is shown as a fine line, generally straighter than a natural stream, marking a cut channel taking water off the land.
Marks a cut channel draining water from agricultural land.
Contexts: Maps
Is told from a natural stream by its straightness rather than by a different symbol, so the reading depends on the line's geometry rather than its style.
Contexts: Maps
A fine unbroken line running across the map, notably straighter and more regular than a natural watercourse.
A fuller structured visual breakdown is not yet documented for this symbol.