Geohashers

Geohashers are enthusiasts of geohashing, a hobby and informal discipline that combines geospatial encoding with exploration. Geohashers generate geohashes and often travel to, log, or photograph locations that correspond to those hashes. They typically share their results on online platforms, contributing to a distributed community focused on location-based puzzles, exploration, and geographic awareness.

Geohash is a method for encoding a latitude and longitude into a short alphanumeric string. It works by repeatedly dividing the world into a grid and interleaving the binary representations of the coordinates, then encoding the bits in base32. The result is a compact text string; longer hashes identify a smaller geographic area, enabling proximity queries and efficient indexing in databases.

Community and practice: The geohashing community maintains sites and forums where participants post a hash, the date, and a report of their visit. Some practitioners participate in informal challenges or “geohashing days” that encourage visiting new hashes, often in a playful or educational spirit. The activity emphasizes legality, safety, and respect for property, and is used as a way to learn about maps and spatial data.

Impact and considerations: Geohashers contribute to public awareness of geospatial concepts and provide practical examples of encoding and indexing. The movement also raises concerns about trespassing, privacy, and safety when sharing precise locations. Because it is informal and decentralized, there is no single governing body, and practices vary among participants.