What is parallel to lines of longitude from the Earth's rotational axis?

Maximize your readiness for the CDC 3E551 Engineering Journeyman Exam. Use flashcards and multiple choice questions, complete with hints and explanations. Start your journey to success today!

Multiple Choice

What is parallel to lines of longitude from the Earth's rotational axis?

Lines of longitude run north–south from pole to pole and are aligned with the Earth's rotational axis. A direction that stays parallel to that axis is a north–south direction, which on a map is represented by grid north. Grid north is defined to point along the map’s grid in the same general direction as true north, and it remains parallel to the lines of longitude. Zenith is straight up from your location, not a horizontal direction. Magnetic north points toward the magnetic pole and varies with location and time. A bearing is any directional measurement, not specifically tied to the axis. So the direction parallel to the axis and to lines of longitude is grid north.

Lines of longitude run north–south from pole to pole and are aligned with the Earth's rotational axis. A direction that stays parallel to that axis is a north–south direction, which on a map is represented by grid north. Grid north is defined to point along the map’s grid in the same general direction as true north, and it remains parallel to the lines of longitude. Zenith is straight up from your location, not a horizontal direction. Magnetic north points toward the magnetic pole and varies with location and time. A bearing is any directional measurement, not specifically tied to the axis. So the direction parallel to the axis and to lines of longitude is grid north.

More practice questions