John Fremont's ability to draw accurate maps was a talent. The map of the Great Basin was what "changed the entire picture of the West". His maps after 3 expeditions were used by thousands of people moving West.
John C. Frémont's detailed maps and reports in the mid-1800s significantly altered people's perceptions of the West by portraying it as a land of opportunity and rich resources. His work encouraged settlement and supported the U.S. government's claims under the doctrine of Manifest Destiny. Frémont's explorations not only informed individuals about the West but also shaped national expansion policies.
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