Official websites use .gov
A
.gov website belongs to an official
government organization in the United States.
Secure .gov websites use HTTPS
A lock (
) or https:// means you've safely
connected to the .gov website. Share sensitive
information only on official, secure websites.
(Left) S2 and H3 geohashes covering the contiguous United States colored by estimated population. (Right) “Safe Harbor” geohashes aggregated to prevent any single geohash from containing less than 20,000 estimated individuals. Aggregated geohashes are outlined in red.
