Scale
The scale of a map allows a reader to calculate the size, height and dimensions of the features shown on the map, as well as distances between different points. The scale on a map is the ratio between real life sizes and how many times it has been shrunk to fit it on the map.
On a 1:50,000 scale map, 1 cm on the map represents 50,000 cm on the ground (= 500 m or 0.5 km).
Ordnance Survey maps, the most common type of map in the UK, come in several scales.
- Travel maps have a scale of 1:125,000. This means 1 cm on the map represents 125,000 in the real world or 1 cm = 1.25 km. These are used by drivers travelling long distances.
- Landranger maps are 1:50,000 (1 cm = 500 m). These are useful for drivers going shorter distances.
- Explorer maps are 1:25,000 (1 cm = 250 m). These are useful for walking and other outdoor pursuits.
- Landplan maps are 1:10,000 (1 cm = 100 m). These show individual streets clearly and might be used by town planners.