Reading a Map: Scale, Legend, Latitude and Longitude
Most of geography rests on map reading, and it is often skipped because it looks easy. Four parts deserve attention from the start. The title tells you what the map is about. The legend explains every symbol and colour, such as green for lowland and brown for mountains. The compass rose shows direction. The scale gives the ratio between distance on paper and distance on the ground: at 1:100,000, one centimetre on the map stands for 100,000 centimetres, or one kilometre, in real life.
Scale practice works best with a ruler and an atlas. Students measure the gap between two towns, multiply by the scale number and convert the result to kilometres. Most mistakes happen in that unit conversion, so it helps to write each step on its own line: centimetres times scale, then divide by 100,000. The reverse problem is worth trying too, where the map distance and the real distance are known and the scale is missing.
Latitude and longitude get swapped all the time. Lines of latitude run horizontally and measure how far north or south of the equator a place lies. Lines of longitude run from pole to pole and measure how far east or west of the zero line at Greenwich. Indonesia's astronomical position, which spans about 6°N to 11°S in latitude and 95°E to 141°E in longitude, makes a handy example because students can find it straight away in an atlas. One more thing to know: map projections distort size. Greenland looks almost as large as Africa on many world maps, though in reality it is far smaller.
A student can read maps once they can work out distance from the scale and give a place's position in latitude and longitude without guessing.