{"type":"rich","version":"1.0","title":"Globe99 wrote","author_name":"Globe99 (npub147…paq44)","author_url":"https://nostr.now/npub147fp2j606qpfysp38phhzvempt7ewsdqwm6uww9uycp6tdvavu0s5paq44","provider_name":"njump","provider_url":"https://nostr.now","html":"Not sure exactly what implementation he's using here, but there is a standard tag in Nostr to add a \"geohash.\" The geohashing format has something of an arbitrary precision level; so you could be (say) 2000 mile radius, 200, 20, etc."}