[{"n": "Bathymetry", "u": "/e/physical-and-ocean-floor-features/bathymetry/", "s": "Study of underwater depth of ocean, river, and lake floors."}, {"n": "Kerguelen Plateau", "u": "/e/physical-and-ocean-floor-features/kerguelen-plateau/", "s": "A large igneous province in the southern Indian Ocean, produced by the Kerguelen hotspot."}, {"n": "Zealandia", "u": "/e/physical-and-ocean-floor-features/zealandia/", "s": "A submerged continent in Oceania, mostly beneath the Pacific Ocean."}, {"n": "Antarctic", "u": "/e/physical-and-ocean-floor-features/antarctic/", "s": "Polar region surrounding the South Pole, governed by treaty."}, {"n": "Polar regions", "u": "/e/physical-and-ocean-floor-features/polar-regions/", "s": "Earth's frigid zones surrounding the North and South Poles."}, {"n": "Subantarctic", "u": "/e/physical-and-ocean-floor-features/subantarctic/", "s": "Subantarctic region: islands and waters north of Antarctica, south of the Subtropical Front."}, {"n": "Topography", "u": "/e/physical-and-ocean-floor-features/topography/", "s": "Study of land surface forms and features."}, {"n": "Terrain", "u": "/e/physical-and-ocean-floor-features/terrain/", "s": "The shape and dimension of Earth's land surface."}, {"n": "Contour line", "u": "/e/physical-and-ocean-floor-features/contour-line/", "s": "Lines joining points of equal value on maps and graphs."}, {"n": "Elevation", "u": "/e/physical-and-ocean-floor-features/elevation/", "s": "Height above a reference geoid, distinct from altitude and depth."}, {"n": "Altitude", "u": "/e/physical-and-ocean-floor-features/altitude/", "s": "Vertical distance measurement with varied definitions across contexts."}, {"n": "Hypsometry", "u": "/e/physical-and-ocean-floor-features/hypsometry/", "s": "Measurement of Earth's surface elevation and depth relative to sea level."}, {"n": "Digital elevation model", "u": "/e/physical-and-ocean-floor-features/digital-elevation-model/", "s": "3D computer graphics representation of elevation data for terrain."}, {"n": "Grade (slope)", "u": "/e/physical-and-ocean-floor-features/grade-slope/", "s": "Grade measures steepness as angle, percentage, or ratio."}, {"n": "Geoid", "u": "/e/physical-and-ocean-floor-features/geoid/", "s": "The geoid is the equipotential surface of Earth's gravity."}, {"n": "Physical geodesy", "u": "/e/physical-and-ocean-floor-features/physical-geodesy/", "s": "Study of Earth's gravity and its potential field for geodesy."}, {"n": "Great circle", "u": "/e/physical-and-ocean-floor-features/great-circle/", "s": "Largest circle on a sphere, shortest path between two points."}, {"n": "Meridian (geography)", "u": "/e/physical-and-ocean-floor-features/meridian-geography/", "s": "A meridian is a line of longitude connecting the poles."}, {"n": "Equator", "u": "/e/physical-and-ocean-floor-features/equator/", "s": "Imaginary line dividing Earth into Northern and Southern Hemispheres."}, {"n": "Circle of latitude", "u": "/e/physical-and-ocean-floor-features/circle-of-latitude/", "s": "Imaginary east–west lines parallel to the Equator."}, {"n": "Tropic of Cancer", "u": "/e/physical-and-ocean-floor-features/tropic-of-cancer/", "s": "Northernmost latitude where the Sun appears directly overhead."}, {"n": "North Pole", "u": "/e/physical-and-ocean-floor-features/north-pole/", "s": "Northernmost point on Earth, located in the Arctic Ocean."}, {"n": "South Pole", "u": "/e/physical-and-ocean-floor-features/south-pole/", "s": "Southernmost waters of the World Ocean, encircling Antarctica south of 60° S."}]