What a location code contains
Just coordinates, in a format phones have understood for years:
geo:52.51630,13.37770Latitude, then longitude. When a camera reads it, the phone hands the coordinates to its default map app — Apple Maps on an iPhone, Google Maps on most Androids — and drops a pin.
geo: or a Google Maps link?
Both work. They behave differently in ways that matter depending on the situation.
A geo: code:
- Opens whichever map app the person actually uses.
- Resolves with no internet connection — the coordinates are in the code.
- Very short, so the code stays chunky and scans easily at small sizes.
- Shows a plain pin, with no business name or reviews.
A Google Maps link:
- Shows your business listing with name, hours, photos and reviews.
- Always opens Google Maps, whatever the person prefers.
- Needs a connection to resolve.
- Much longer, so a denser code.
Rule of thumb: geo: for a place on the ground — an entrance, a stand, a meeting point, a trailhead. A Maps link for a business, where the listing is the point.
Getting the coordinates right
- Open Google Maps on a computer.
- Right-click the exact spot — not the building outline, the door people should walk to.
- The numbers at the top of the menu are latitude and longitude. Click to copy.
- Latitude goes in the first field, longitude in the second.
On a phone, long-press the map and the coordinates appear in the search bar. Apple Maps shows them under a dropped pin.
How precise is precise enough?
- 3 decimals — about 110 m. A street.
- 4 decimals — about 11 m. A building.
- 5 decimals — about 1 m. A doorway.
Five is the practical ceiling. More digits only make the code denser.
Where it earns its place
Location codes are most useful where an address alone is not enough:
- Events — the specific gate or entrance, not the venue's postal address.
- Large sites — hospitals, campuses, industrial parks, exhibition halls.
- Rural addresses — where postcodes cover a wide area.
- Deliveries — the loading bay rather than the front door.
- Trails and outdoors — where offline resolution genuinely matters.
Print the address too
A code alone is a single point of failure. Someone with a flat battery, an older phone or a hesitancy about scanning unknown codes needs the address in text alongside. The code should be the fast path, not the only one — and for a venue people are trying to reach on time, that matters more than usual.