According to Sigmund Freud Topographical and structural theory of mind

according to Sigmund Freud Topographical and structural theory of mind, what does these terms “Topographical” and “structural” actually represents?

Topographical - levels of mind(he used the analogy of an iceberg) - Conscious, Preconscious and Unconscious

Structural - He believed psyche had three structures - Id, Ego and Super Ego

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