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Data representation

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Question 16

An environmental scientist is analyzing two digital satellite images of the exact same 5 km×5 km5\text{ km} \times 5\text{ km}5 km×5 km forest reserve.

Image A is captured with a resolution of 800×800 800 \times 800\,800×800 pixels. Image B is captured with a resolution of 4800×4800 4800 \times 4800\,4800×4800 pixels.

Both images are displayed at full-screen size on the same square diagnostic monitor.

Explain one reason why Image B will display the canopy structure with significantly greater clarity and detail than Image A.

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Markscheme

Data representation Questions

  1. GCSE
  2. /Computer Science
  3. /Data representation

40 exam-style questions on Edexcel GCSE Computer Science Data representation, covering Encoding characters with 7-bit ASCII, Representing bitmap images in binary, Representing analogue sound in binary, and Limitations of binary representation. Each one has a worked solution and a mark scheme showing where the marks go.

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