1. the science and practice of surveying, mapping, and describing bodies of water, including their physical features, depths, currents, and coastlines.
Usage: technical; often used in nautical and geographic contexts
2. a map or chart showing the physical features of a body of water and surrounding land.
Usage: technical

Examples

• The hydrography of the harbor was carefully studied before construction of the new port began.
• Modern hydrography relies on advanced sonar and satellite technology to map ocean floors.
• The ship's captain consulted the hydrography to navigate safely through the shallow waters.
• Hydrography is essential for understanding coastal erosion and sediment movement.
• The government agency updated its hydrography records after the earthquake altered the seafloor.
• Students in the maritime program learned hydrography as part of their navigation training.