Understanding OS Map Skills

Front

OS map symbol: Blue line

Back

river or stream

Front

OS map symbol: Green tree

Back

forest

Front

OS map symbol: Black square

Back

Building

Front

OS map symbol: Red line

Back

road (main road)

Front

OS map symbol: Blue triangle

Back

triangulation pillar (trig point)

Front

4-figure grid reference

Back

a grid square (e.g. 1234)

Front

6-figure grid reference

Back

an exact location (e.g. 123456)

Front

First two digits in grid reference

Back

eastings (horizontal lines)

Front

Last two digits in grid reference

Back

northings (vertical lines)

Front

Measuring distance: as the crow flies

Back

straight line between two points