Interpret ground, oblique and aerial photographs and read patterns and trends from graphs and tables

What this dot point is asking

SEAB wants you to read information from photographs and from graphs and tables, and to use it accurately in answers. The central insight is that data-response questions test two separate skills: describing what the figure shows (reading it correctly, with values) and explaining why (the geography behind it). Strong answers do both, in that order, and quote real numbers from the data.

The answer

Types of photograph and how to read them

Three kinds of photograph appear in geography:

• Ground (or terrestrial) photographs are taken from eye level, looking across a scene. They show the front of features (a beach, a street, a slope) but hide what is behind.
• Oblique aerial photographs are taken from a plane at an angle, showing both the tops and the sides of features and giving a sense of depth.
• Vertical aerial photographs and satellite images are taken from directly above, like a map, showing the layout and area of features but not their height.

To describe a photograph: name what you can see (land use, landforms, vegetation, buildings), say where it is in the frame (foreground, background, left, right), and pick out the pattern (for example, dense buildings near the river, farmland beyond).

Reading graphs and tables

Different graphs suit different data:

• Line graphs show how a value changes over time (a trend); read the rise, fall, peaks and troughs, and quote values at key points.
• Bar graphs compare separate categories or amounts; read which is largest or smallest and by how much.
• Pie charts show the share each part takes of a whole; read the largest and smallest slices as proportions or percentages.
• Scatter graphs show the relationship between two variables; read whether they rise together (positive), move oppositely (negative) or show no clear link.

For a table, scan for the highest and lowest values, the totals, and any pattern down a column or across a row.

The describe-then-explain approach

The reliable method for any data-response question:

1. Describe the pattern or trend, using values from the data: "rainfall rises from $120\ \text{mm}$ in January to $320\ \text{mm}$ in April".
2. Explain the pattern with the geography you have learned: "because the place lies near the equator and receives intense convectional rainfall".
3. If asked, calculate simple figures such as the range (highest minus lowest), the difference, or the percentage.

Examples in context

Example 1. Tourism brochures and satellite images of Bali. A promotional ground photograph of a Bali beach shows palm-fringed sand and resorts in the foreground but hides the crowding and traffic behind, while a vertical satellite image of the same coast reveals the dense ribbon of hotels packed along the shoreline. Reading both together shows how photograph type shapes the impression given, a key skill when a data-response question asks you to assess the impacts of tourism from images.

Example 2. Climate graphs for a geographical investigation. When students study the climate of a place, they plot a climate graph combining a line for temperature and bars for rainfall. Reading it, they describe the temperature trend and the rainfall peaks with values, then explain them using the climate type. The same describe-then-explain routine applies whether the data is rainfall, tourist numbers or crop yields, which is why mastering it pays off across every theme.

Try this

Q1. State the most suitable type of graph to show how a country's population changed each year over fifty years, and give a reason. [2 marks]

• Cue. A line graph, because it shows a continuous change over time (a trend), making the rise or fall across the years clear at a glance.

Q2. Explain one limitation of a ground-level photograph. [2 marks]

• Cue. A ground photograph is taken from eye level, so it cannot show what lies behind the features in front; objects in the background may be hidden, giving an incomplete view of the area.

Q3. A table shows rainfall of $50$, $90$, $30$ and $110\ \text{mm}$ for four months. Calculate the range. [2 marks]

• Cue. The range is the highest value minus the lowest: $110 - 30 = 80\ \text{mm}$.