@® Codes are designed for human-centric location referencing. The "Show More" feature enables a user to quickly see, thus easily choose or dismiss, the eight closest map locations with the same @ Code as their present one.
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By definition, these closest identical @ Codes fall 1 km away to the N, E, S, or W, or 1.42 km away to NE, SE, SW, or NW; generally most of them will be irrelevant to the user. Said another way, every @ Code is unique within an area of 4 sq km (1.5 sq mi) -- roughly 500 football fields.