How to use the Geo QR Code Generator
A pin without an address
Some places do not have a useful street address: a trailhead, a market stall, a festival gate, a viewpoint, a rural workshop. A geo: code stores the coordinates themselves, so the scan opens the phone's map app with a pin dropped at exactly that spot. The scanner gets walking directions to the pin instead of to the nearest building with a similar name, which is the failure mode of every address-based code in the countryside.
Get the coordinates right
Stand at the exact spot with your phone, drop a pin in your map app, and copy the coordinates it shows. Latitude runs from -90 to 90 and longitude from -180 to 180, and this tool checks both ranges before generating the code. Check the pin on the map after entering it: a swapped or mistyped digit can move the pin to another town, and a printed code keeps that mistake forever. Add a short label, such as the entrance name, so the pin is recognisable when it opens.
Testing before you print
Print a sample at the real size, stick it where it will actually live, and scan it with two different phones, one iPhone and one Android, in the real lighting. Confirm the map pin lands where you stood, and that directions to it make sense. Keep the quiet zone around the code and print dark modules on a light background with strong contrast. For outdoor signs, use weatherproof stock and test under the actual sun and shade.