character: Hipparchus
topic: Contributions to geography and cartography
grade: 10
subject: Geography
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character: Eratosthenes
topic: Measuring the Earth's circumference
grade: 10
subject: Geography
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character: Ptolemy
topic: The Geography and map projections
grade: 10
subject: Geography
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character: Claudius Ptolemy
topic: Development of early map-making techniques
grade: 10
subject: Geography
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