See my NIP-G0 proposal on github, meant to address this for events and news and geo-centric event kinds.
GitHub
NIP-G0 for Geospatial Tagging Standardization by swbratcher · Pull Request #1642 · nostr-protocol/nips
Introduction of NIP to standardize event geospatial tagging for location of event origin and location area of event relevance, with both being hier...