• 1 · Religion and Magic
• 2 · Nature
• 3 · Human Being, Man in General
• 4 · Society, Civilization, Culture
• 5 · Abstract Ideas and Concepts
• 6 · History
• 7 · Bible
• 8 · Literature
• 9 · Classical Mythology and Ancient History

• Top
• 2 · Nature
• 25 · earth, world as celestial body
• 25A · maps, atlases
• 25A9 · map making
• 25A91 · geodesy, surveying

25A911 · instruments used in geodesy, surveying instruments

• 25A9111 · Jacob's staff (surveying instrument)