Random GPS Coordinates: How They Work and How to Use Them
Random coordinates are useful for testing maps, seeding location-based apps and playing exploration games. But generating them correctly is trickier than it looks. Here is what you need to know.
Latitude and longitude in 60 seconds
Latitude measures north–south position from −90° (South Pole) to +90° (North Pole). Longitude measures east–west from −180° to +180°, with 0° at Greenwich. Coordinates in decimal degrees look like 48.8584, 2.2945 — the Eiffel Tower.
The pole-clustering trap
Picking latitude uniformly between −90 and 90 puts far too many points near the poles, because lines of latitude get shorter as you move north or south. RandNow uses an area-uniform method (based on the arcsine of a random value), so every square kilometre of Earth has an equal chance. Remember that about 71% of the planet is ocean — most truly random points land in water.
Practical uses
- Map and GIS testing: seed markers, clusters and distance queries.
- Geofencing QA: test points just inside and outside boundaries.
- Exploration games: use “near major cities” and visit the spot in Street View.
- Teaching: practise reading coordinates on a globe.
Pro tips
- Six decimal places ≈ 11 cm precision — more than enough for most apps.
- Use “Continental USA” or “Europe” to keep points on land in those regions.
- Click any result to open it directly in Google Maps.