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Subject
- Great Trigonometrical Survey of India4
- Himalaya Mountains—Maps[remove]4
- Tibet Autonomous Region (China)—Maps[remove]4
- Himalaya Mountains—Discovery and exploration—Maps3
- Surveying3
- India, Northeastern—Maps2
- Nepal—Maps2
- Physical geography—Himalaya Mountains—Maps2
- Tibet—Discovery and exploration—Maps2
- Triangulation2
- Brahmaputra River—Discovery and exploration—Maps1
- Explorers—India1
- Himalaya Mountains—Discovery and exploration1
- Kathmandu (Nepal)—Maps1
- Lop Nur (China)—Maps1
- Qinghai Sheng (China)—Maps1
- Sichuan Sheng (China)—Maps1
- Sikkim (India)—Maps1