全部书籍

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

1 Primary & Middle School Biology1–9 年级在线 2 High School Biology10–12 年级在线 3 University Biology — Year 1本科一年级在线 4 University Biology — Year 2本科二年级在线 5 University Biology — Year 3本科三年级在线

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

全部游戏 Math Fuse Word Reactor Atlas Dash

应用关于

Coach

English Français Español Nederlands Português हिन्दी العربية Bahasa Indonesia 简体中文 বাংলা

登录开始阅读

书籍暂未推出简体中文版——当前显示英文版。

Earth and Space Sciences · 术语表

什么是 Meridian, longitude and prime meridian？

又称： meridian · prime meridian · longitude

Definition 14.3 Primary & Middle School Earth and Space Sciences · 第 14 章 — Latitude, Longitude and Time Zones

A meridian is a half-circle drawn on the globe from the North Pole to the South Pole. The prime meridian is the meridian chosen as the starting line: the one that passes through the old Royal Observatory at Greenwich, in London. The longitude of a place is the angle between the prime meridian and the meridian of that place, seen from the axis of the Earth. It goes from $0^\circ$ at the prime meridian to $180^\circ$ , and we say whether the place is east (E) or west (W) of the prime meridian.

A globe with its parallels (blue) and meridians (grey), every 30. The equator is drawn in thick green, the prime meridian in red; they cross in the ocean south of Ghana, at latitude 0, longitude 0. Every meridian runs from pole to pole; every parallel is a circle around the axis. (Land: Natural Earth.) — A globe with its parallels (blue) and meridians (grey), every $30^\circ$ . The equator is drawn in thick green, the prime meridian in red; they cross in the ocean south of Ghana, at latitude $0^\circ$ , longitude $0^\circ$ . Every meridian runs from pole to pole; every parallel is a circle around the axis. (Land: Natural Earth.)

示例

Example 14.5 (Reading the coordinates of Sydney)

On the map, Sydney lies below the equator: it is in the southern hemisphere, a little above the parallel $30^\circ$ S, closer to $30^\circ$ than to $60^\circ$ ; its latitude is about $34^\circ$ S. It lies to the right of the prime meridian, a little beyond the meridian $150^\circ$ E; its longitude is about $151^\circ$ E. We write: Sydney, $34^\circ$ S, $151^\circ$ E.

在原文中阅读 →