Adding Glonass to the mix

GLONASS won’t improve GPS locations in open areas, but should help in forests and canyons when some GPS satellites are blocked and GPS accuracy might be much worse than usual. Still worthwhile to use GLONASS, won’t hurt.

What should help for your project:

– WAAS corrects for GPS signal atmospheric distortions in “real time” and generally doubles accuracy. Only in North America with a clear view to the south.

– Galileo generally provides better positions than GPS, and improves coverage and accuracy in forests and canyons better than GLONASS.

More here –

GPS: The Good, the Bad, and the Ugly
https://backpackinglight.com/gps-good-bad-ugly/

— Rex

Thanks Rex

One more practice might help: letting your GPS device sit still at the desired location for a few minutes. On my iPhone at known locations, especially in canyons and woods, I frequently see the GPS “bullseye” collapse from a circle hundreds of yards (meters) across, and the dot location get more accurate, after a minute or two. Probably similar for other devices, no direct experience. But in theory, all GPS positions should get better over time, with rapidly diminishing returns, due to getting signals from more satellites plus averaging.

And speaking of iPhones – in the latest iOS updates, each location-using app can have “Precise Location” turned off under Settings > Privacy > Location Services. Make sure it’s ON for whichever apps you desire. When I turn it off for Google Maps, I get a random location in the correct half of my relatively small county.

— Rex