Which maps app will open?

Whichever the person has set as their default. The code holds a standard geo link rather than a link to any one provider, so nobody is forced into a particular app.

How precise do the numbers need to be?

Six decimal places is about a tenth of a metre, which is far more than anyone needs. Extra digits are trimmed because they only make the pattern denser.

Can I use an address instead?

Not here. This encodes coordinates, which work with no lookup and no network. An address needs a geocoder, and that means sending it somewhere.

Location QR Code Generator

Scanning opens the spot in a maps app.

Latitude

Between -90 and 90. Negative is south of the equator.

Longitude

Between -180 and 180. Negative is west of Greenwich.

Download as

pngsvg

Scanning opens the spot in a maps app.

How to use it

Find your coordinates. Long press a spot in most maps apps and it will show the latitude and longitude to copy.
Paste them in. Latitude first, then longitude. Both are checked against their real ranges before the code is drawn.
Download it. PNG for screens, SVG for print. The geo value underneath shows exactly what will open.

When you would use this

A location QR code holds a pair of coordinates as a geo link, so scanning it drops a pin in whichever maps app the person already uses. It is genuinely useful anywhere an address is ambiguous or does not exist: a field entrance, a trailhead, a delivery gate round the back of a building, a meeting point in a large park. Because it encodes the position itself rather than a link to one mapping provider, it keeps working regardless of which app the person prefers and needs no lookup service in the middle. Both numbers are range checked before anything is drawn, since a transposed latitude and longitude produces a valid looking code pointing at the wrong hemisphere.

Questions

Which maps app will open?: Whichever the person has set as their default. The code holds a standard geo link rather than a link to any one provider, so nobody is forced into a particular app.
How precise do the numbers need to be?: Six decimal places is about a tenth of a metre, which is far more than anyone needs. Extra digits are trimmed because they only make the pattern denser.
Can I use an address instead?: Not here. This encodes coordinates, which work with no lookup and no network. An address needs a geocoder, and that means sending it somewhere.