零等高线的英文

• zero contour

• 零:    zero zero sign; nought
• 等高线:    contour; isoheight; isoline; ...
• 等高线:    contour (line); isoheight; isoline; isohypse (line) (地形图上标高相等的点连成的封闭曲线)
• tin等高线:    tin contour
• 半距等高线:    half interval contour; half-interval contour; zero five contour