Understanding Longitude and the Prime Meridian - Earth Coordinate System Explained #251592 (License: Personal Use)

The image depicts a cross-sectional view of Earth, highlighting key reference lines: the prime meridian (0° longitude), the equator (0° latitude), and the longitude of point A, shown as an angular measurement from the prime meridian. Shading indicates the Western Hemisphere, while labeled poles and directional arrows clarify spatial relationships in the global coordinate system.

Used in educational web pages, geography textbooks, or GIS tutorials to explain how latitude and longitude locate points on Earth; matches user intent for learning basic cartography or preparing for standardized tests.