- approximate contour lines
- 等高线: contour; isoheight; isoline; ...
- 概位: position approximate
- 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
关注微信公众号：chachacidian，回复:等高线概位，即可在微信中查询翻译
