Geographers collect large amounts of information about places, populations and the environment. To make this data easy to read and compare, we organise it into tables and display it using graphs. Choosing the right method helps us see patterns, trends and differences at a glance.
Tables
A table arranges data neatly in rows and columns. Every good table needs a clear title, labelled headings for each column, and the correct units (such as mm, °C or thousands of people). Tables are useful for showing exact figures, but a long table can be hard to interpret quickly.
Remember
- Title states what the data shows.
- Column headings include units.
- Arrange data in a logical order (for example, by month or year).
Types of Graph
Different graphs suit different kinds of data:
- Bar graph - compares separate categories using bars of equal width; the taller the bar, the larger the value.
- Line graph - shows how a value changes over time, such as temperature through the year.
- Pictograph - uses symbols, where each symbol stands for a fixed quantity.
Key idea
A table stores exact values; a graph turns those values into a visual pattern that is easier to compare and interpret.
Example
Monthly rainfall for a town can be listed in a table, then drawn as a bar graph. The tallest bar instantly shows the wettest month without reading every figure.
Whatever graph you draw, always include a title, labelled axes with units, and an even scale so the reader is not misled.