Open Geosocial

Notes on geosocial on atproto during atmosphereconf 2026, also known as #atgeo

atgeo.org

2026-03-27 - atgeo.org - ATGeo provides a Place lexicon for ATProtocol, and a lookup service for geographic venues that implements the lexicon. Published by @schuyler.info

Known Lexicons

community.lexicon.location

.address - street address

.geo - latitude and longitude

.fsq - foursquare place id

.hthree - h3geo hex identifier

org.atgeo.place

Referenced from atgeo.org

Not present on lexicon.garden

community.atprotocol.geomarker.marker

Locations as primary identities

Referenced from Two Ways to Build Location on ATProto: Geo Markers vs. Embedded Check-ins

Not present on lexicon.garden

Known apps

beaconbits.app - gamified check-ins and placemaking, montoulieu.dev

Garganorn - ATProtocol XRPC server, @schuyler.info

Sebastian @seabass.bsky.social , Flashes, https://www.flashes.blue

Dan @danoleary.me , The Midst, https://www.themidstapp.com

Matt @librenews.bsky.social , Geo, https://geo.feeds.social

Tijs @tijs.org , Anchor, https://dropanchor.app

athere @herebox.org , h3geo proximity filtering

Known community chat

#atgeo hashtag

Atproto Touchers Discord

#atgeo-apps

#lcwg-atgeo-gazetteer

w3c geosocial task force

Gazetteer XRPC Query API

Gazetteer - XRPC Query API returning ATGeo Place formatted JSON

Example for Stanley Park, Vancouver

OSM way 37063023

places.atgeo.org

openstreetmap.org

Foursquare 598d11080e5da87109b4d0a3

places.atgeo.org

app.foursquare.com

Overture

explore.overturemaps.org

places.atgeo.org ??

similar - 173e824a-dbe3-4354-8950-a15c4f9b9868

not found - fa586cc1-cc1a-3a1e-b4b3-9162df5a0e5c

Additional refs

From atprotocol.dev :

2025-03-05 - Location Data on AT Protocol, the second Community Fund project

From tijs.org :

2025-06-08 - The Missing Piece: How Location Data is Coming to the AT Protocol

2025-06-09 - Two Ways to Build Location on ATProto: Geo Markers vs. Embedded Check-ins

2025-06-13 - Building a Foursquare Clone on AT Protocol

From atproto.wiki :

2025-06-30 ATgeo Marker - Experimental app for markers to test Gazeteers + Geo lexicons. See ATgeo Experiments.

ATgeo working group and ATgeo Experiments

From essentialrandom.bsky.social :

2025-09-29 - atgeo lexicon usage analysis

From herebox.org :

2026-03-12 - W3C - geosocial task force

Example h3geo hex for downtown Vancouver addressable as #8728de8d8ffffff at resolution 7

Example python code to post to PDS as custom collection using community.lexicon.location.hthree , github.com/here/athere