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1 Primary & Middle School Mathematics1–9 年级在线 2 High School Mathematics10–12 年级在线 3 University Mathematics — Year 1本科一年级在线 4 University Mathematics — Year 2本科二年级在线 5 University Mathematics — Year 3本科三年级在线

1 Primary & Middle School Physics1–9 年级在线 2 High School Physics10–12 年级在线 3 University Physics — Year 1本科一年级在线 4 University Physics — Year 2本科二年级在线 5 University Physics — Year 3本科三年级在线

1 School Chemistry — Grades 1 to 121–12 年级在线 2 University Chemistry — Year 1本科一年级在线 3 University Chemistry — Year 2本科二年级在线 4 University Chemistry — Year 3本科三年级在线

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1 Primary & Middle School Earth and Space Sciences1–9 年级在线 2 High School Earth and Space Sciences10–12 年级在线 3 University Earth and Space Sciences — Year 1本科一年级在线 4 University Earth and Space Sciences — Year 2本科二年级在线 5 University Earth and Space Sciences — Year 3本科三年级在线

1 Markets I: The Ecosystem and Exchange-Traded Markets市场在线 2 Markets II: Rates, FX and Credit市场在线 3 Markets III: Commodities, Energy and Crypto市场在线 4 Quantitative Methods方法在线 5 Derivatives and Volatility衍生品在线 6 Rates, Credit, XVA and Risk利率、信用与风险在线 7 Research Craft: Predictors, Backtests, Measurement, Portfolios研究在线 8 Strategies I: Equities and Futures策略在线 9 Strategies II: Volatility, Relative Value, Macro and the Bank Desks策略在线 10 Microstructure and Execution交易执行在线 11 Market Making and High-Frequency Trading做市在线 12 Machine Learning for Markets机器学习在线 13 Low-Latency Software技术在线 14 Networks, Hardware and Trading Infrastructure技术在线 15 Research, Data and Risk Platforms技术在线 16 The Desk and the Firm公司运营在线 17 The Industry: Firms, Roles and Careers职业发展在线 18 Interviews I: Maths, Probability and Speed职业发展在线 19 Interviews II: Markets, Trading Games and the Final Round职业发展在线 20 Interviews III: Code职业发展在线

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Earth and Space Sciences · 术语表

什么是 Contour line and contour interval？

又称： contour line · contour interval

Definition 32.7 Primary & Middle School Earth and Space Sciences · 第 32 章 — Maps of the Whole Earth

A contour line is a line on a map joining points of the ground at the same altitude. The contour interval is the difference in altitude between two neighbouring contour lines; it is the same all over the map.

$A hill sliced every 100\, m (a sketch). Seen from above, each slice gives a closed contour line around the summit. Where the slope is steep (east), the lines are close together; where it is gentle (west), they are far apart.$

A hill sliced every

100\,\mathrm{m}

(a sketch). Seen from above, each slice gives a closed contour line around the summit. Where the slope is steep (east), the lines are close together; where it is gentle (west), they are far apart.

$Top: a topographic map of part of the Varden Hills at 1 : 50\,000 (1 cm on the map for 500\, m on the ground). Contour interval 50\, m; the index contours, thicker, are at 250 and 500\, m. The river flows east along a flat valley floor. Bottom: the topographic profile along C–D, from south to north; the dots are the points where C–D crosses a contour line (the vertical scale is stretched three times).$

Top: a topographic map of part of the Varden Hills at

1 : 50\,000

(1 cm on the map for

500\,\mathrm{m}

on the ground). Contour interval

50\,\mathrm{m}

; the index contours, thicker, are at 250 and

500\,\mathrm{m}

. The river flows east along a flat valley floor. Bottom: the topographic profile along C–D, from south to north; the dots are the points where C–D crosses a contour line (the vertical scale is stretched three times).

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