The colours on the map are used to show altitude layers, for example, green between 0 and 200 metres, yellow from 200 to 500 metres, and brown above 500 metres.
The relation of the size of a map to the actual size of its area on the ground expressed as a "representative fraction". For example 1:1,000,000 means one unit of length on the map represents one million such [...]
The technique used by cartographers to turn the spherical surface of the earth to a flat plane in order to represent it on a flat piece of paper. There are hundreds of different projections; none can be an [...]
A system of x-y coordinates applied digitally to a map which enables any point on the map to be located automatically on calling up its coordinates. Alternatively clicking onto any point on the map will yield the coordinates [...]