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Geographical Skills

Comparing maps, sketch maps and photographs

  • 2 things to know
  • All three papers

Overview

Comparing maps of different dates and scales, what a sketch map is and what it must carry, and how ground level, oblique aerial and vertical aerial photographs and satellite images differ.

What you need to know

Answer each one before you reveal it.

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Key term

What can be learned from two maps of one town made many years apart?

Key term

What is a sketch map?

Questions from this subtopic

Each one with the model answer underneath.

  1. 1

    What should be checked before two maps are compared?

    Model answer

    That they cover the same area, and what the scale and the date of each one is.

  2. 2

    What can be learned from two maps of one town made many years apart?

    Model answer

    How far the built-up area has grown, which land uses have changed, and where new roads have been added.

  3. 3

    Why can two maps of the same place look completely different?

    Model answer

    They may be drawn at different scales or show different themes, so one includes detail that the other leaves out.

  4. 4

    What is a sketch map?

    Model answer

    A simple hand-made map showing only the main features needed to make a point, without all the detail of the original.

  5. 5

    What must every sketch map carry to be understood on its own?

    Model answer

    A title, a north arrow, a rough indication of scale and named labels on the features shown.

  6. 6

    Why is a sketch map often clearer than the map or photograph it came from?

    Model answer

    It leaves out everything that does not matter, so the pattern being described stands out.

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