A cartographic illustration of the US that features depictions of longitudinal traces affords a visible framework for understanding geographic location and measurement. These traces, also referred to as meridians, run vertically from the North Pole to the South Pole, intersecting the Equator at proper angles. They supply a foundation for calculating distances east and west of the Prime Meridian, which passes by way of Greenwich, England. For example, a particular level inside the U.S. might be exactly situated by its intersection with a corresponding line of latitude.
The inclusion of those meridians on a United States chart is essential for navigation, surveying, and geographic info programs (GIS). They supply a standardized grid system that permits for correct dedication of place and the calculation of distances. Traditionally, these grids had been important for maritime navigation and land surveying. At present, the traces stay basic to purposes starting from aviation to mapping software program and useful resource administration.