I bought my previous smartphone 6 years ago, just before the first dual frequency smartphone was available.
My new smartphone showed an accuracy of 1.1 meter.
For this I used this geodetic point =
Do not shake it, I don’t know if I can map it in ID.
One of the GNSS apps downloaded data? just before the photoshoot.
I was there already for two minutes.
The weather was cloudy.
I also recently replaced an 8 year old single-band phone (Galaxy S7) with a year old dual-band phone (Pixel 7). Its current-gen GNSS chipset should be comparable to Samsung’s, although it’s Broadcom rather than Qualcomm (not that I think anyone could tell any difference in consumer-grade electronics). I’m in NE Europe, so satellite coverage is also similar. I’ve only been on a couple trips so far, but the overall resulting GPX track seems to be noticeably better for me than before. I imagine it’s a combination of newer GNSS chipset, software processing and of course dual-band. This is somewhat anecdotal evidence because I haven’t done any side-by-side comparison tests, but I did go through the recoded tracks and compared their accuracy/precision and noise to my older tracks. One thing that immediately stands out is that it’s much better in obstructed and partly-obstructed environments, like passing between tall buildings, forested areas, under bridges, etc. My old GPS would jump all over the place and sometimes just fly off to Narnia. The new GPS remains almost as accurate as unobstructed view. This does match the “advertised” benefit of dual-band being able to filter out GPS reflections/errors. And I think there’s some corrective/predictive software processing involved (may be even using compass) as it sometimes slightly overshoots, but it is also able to follow small changes really well. I saw almost no difference in accuracy/precision in perfect conditions with unobstructed views (at least nothing I can tell without side-by-side comparison). However, it is immediately noticeable how any obstruction would cause old GPS to deviate while the new one remains accurate. Basically, under ideal conditions when GPS isn’t having any issues, it’s roughly the same as it was before. But it’s having a lot fewer issues now, which was the main problem for Mapillary recordings since most of the “important” locations are not obstruction-free.
As an example, here’s a location along a tall building with old and new GPS:
You can actually see me following the footways on the new GPS, while the old one only had to handle one service road turn and it still failed miserably.
I remember I could do that with my previous phone. Now it does not seem to work.
Those seven digit coordinates can be used in court, but are not handy for daily use.
