What is the name of the fundamental principle that states locations closer together are more likely to have similar values than locations farther apart?

• A. Weber's Law
• B. Central Place Theory
• C. Modifiable Areal Unit Problem
• D. Tobler's First Law of Geography

Answer: (D)

Proximity shapes similarity: nearby locations tend to share more of the same influences and conditions, so their values are more alike than those that are farther apart. This distance-driven similarity is Tobler's First Law of Geography, named after Waldo Tobler. It embodies spatial autocorrelation—the idea that similar data are clustered in space—and underpins many GIS analyses that examine how relationships weaken with distance.

This concept helps explain why patterns like gradual changes in climate data, land use, or crime rates often show stronger similarity in neighboring areas. The other options describe different ideas: Weber's Law is about perceptual thresholds in psychology; Central Place Theory explains how settlements and services distribute themselves in a region; the Modifiable Areal Unit Problem concerns how the choice of spatial units affects analysis results. They do not capture the fundamental distance-based similarity principle captured by Tobler's First Law.