LevelOfDetailValue A watercourse important mainly at a local level, recommended for representation only at scales of 1:20,000 and larger. local local A watercourse important at a local and district level, recommended for representation only at scales of 1:50,000 and larger. district district A watercourse important at a local, district and regional level, recommended for representation at scales of 1:250,000 and larger. regional regional A watercourse important at a national level recommended for representation at all scales national national