Which term describes lines that connect points of equal value on a map?

The term that accurately describes lines that connect points of equal value on a map is "Isarithmic." This term is used specifically for a type of thematic map that represents data values in two dimensions, where each line denotes a specific value across a geographical area. These lines can be seen in various forms, such as isotherms (temperature), isobars (pressure), or elevation contours, exemplifying how spatial phenomena can be represented visually.

Isarithmic maps are critical in fields like meteorology and geology, as they provide a clear visualization of how that value changes across different geographic locations, highlighting trends and distributions. Understanding isarithmic lines is vital for interpreting complex spatial data and utilizing it effectively in decision-making or further analysis.

The other terms do not accurately capture this concept. Contouring specifically refers to the creation of contour lines, which are often isarithmic but do not encompass all types of equal-value lines. Buffering relates to creating areas of influence around features, while interpolation is a method used to estimate values at unknown points between known data points, rather than the lines that directly connect these points of equal value.