Points of equal time-distance from a specific location on a map are called what?

Points of equal time-distance from a specific location on a map are referred to as isochrones. Isochrones are often used in transportation and geography to show areas that can be reached within a certain time frame, making them highly valuable for planning routes or analyzing accessibility.

In contrast, isobars represent areas of equal atmospheric pressure, while isolines refer to any lines that connect points of equal value for a given variable, such as temperature or elevation. Contour lines specifically indicate elevation on topographic maps, making them distinctly different from isochrones. Thus, isochrones play a unique role in spatial analysis related to time and distance.