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A contour of gravitational variation.
Also known as: Gravity contour map, Anomaly isoline
The geophysical map convention contouring variation in the Earth's gravitational field.
Contours variation in the Earth's gravitational field on a geophysical map.
Contexts: Technical drawing, Maps
Borrows the topographic contour's form for a quantity that has no shape, so a reader's instinct that closed contours mean a hill is wrong here.
Contexts: Technical drawing, Maps
A closed or open contour line on a map, labelled with a value and drawn like a topographic contour.