Poor GNSS accuracy? [Bug 8]

[Nail]

Even when the 67 was laying an ugly track (lack of detail) I saw the points that were laid were accurate. Just not enough of them, so I got straight lines where I should see corners. I wish they had a menu option that allowed the same algorithm to be used the Epix is using. However, the Epix uses a different chipset(?) and the watch is very sensitive to movement, so that might not be possible. The 67's release is not yet a month old, so I'm hoping for future improvements.

If your watch beats GPSMAP, it's not good. I don't know if you've seen my 66sr vs 67 comparison tests. The 67 has never been more agile even at short intervals. I gave mine away, I'd rather wait for them to perfect it.

Green GPSMAP 67
red 66sr

Spoiler

67vs66sr13.jpg

Spoiler

67vs66sr14.jpg

[Gadwin]

I can confirm this agility issue. The GPSMAP 67 is NOT consistent when you make especially short smooth turns (record with 1 mark per sec). Sometimes it gets it sometimes not.

This observation could be explained by the former RINEX files which were posted. Assuming they are somehow correct, that the satellite signal is not constant.

[JungleJim]

This observation could be explained by the former RINEX files which were posted. Assuming they are somehow correct, that the satellite signal is not constant.

That assumption is wrong The RINEX files in their current form (version 4.80 software) contain wrong and incomplete data. So any conclusion based on that data is most probably incorrect until we can verify with correct RINEX data!

[Nail]

I can confirm this agility issue. The GPSMAP 67 is NOT consistent when you make especially short smooth turns (record with 1 mark per sec). Sometimes it gets it sometimes not.

I think Garmin can add functionality that will reconcile everyone.
All you need is the on/off slider "Accuracy" higher/normal
If you want better trace accuracy you will lose battery life.
You want to have energy for a long time, you use good accuracy.
Maybe @Admin would suggest this solution to Garmin engineers.

[Gadwin]

So my question is still open to those people who had a displayed gnss accuracy of 1.5m-1.7m( 5ft), is it still the case or was it also part of the bug and is not the case anymore with firmware 4.80.

I am curious independently if the displayed accuracy is real or not.

[MarkHL]

GPS locates me in my house with 6 feet of accuracy showing... seems fairly good

Spoiler

Recently Updated2.jpg

[GPSrChive]

We recently performed a short 1 mile long walking test, GPSMAP 67 vs GPSMAP 66sr, both units displayed GNSS Accuracy Estimate of 6ft the entire time.

The GPSMAP 66sr was very much right on the money while the GPSMAP 67 clearly still needs some refinement, which is not unexpected.

GPSMAP 67 vs GPSMAP 66sr

GPSMAP 67 vs GPSMAP 66sr v1.png

[JungleJim]

The GPSMAP 66sr was very much right on the money while the GPSMAP 67 clearly still needs some refinement, which is not unexpected.

But is it expected? The AG3335 chipset has been in use in Garmin’s smart watches (and other Garmin devices?) for over a year now…

But indeed let’s hope that Garmin will further refine accuracy and precision of the GPSMAP 67!

[Gadwin]

I wonder if the 66sr was the same at beginning of its release?

[Nail]

I wonder if the 66sr was the same at beginning of its release?

I don't recall him having any accuracy issues. It was promoted as extremely accurate. In Poland, many previous GPSMAP users appreciated the AA battery power supply. I guess that's how it was in the world too. Nobody saw this useful feature of the 66sr as accuracy, only the lack of "AA". Garmin found the golden mean - 67.
I think that it is impossible to increase the accuracy without using energy.
I can accept it if the GPSMAP67 lasts instead of 133 hours 96. After all, I must have some justification to return.

We recently performed a short 1 mile long walking test, GPSMAP 67 vs GPSMAP 66sr, both units displayed GNSS Accuracy Estimate of 6ft the entire time.

The GPSMAP 66sr was very much right on the money while the GPSMAP 67 clearly still needs some refinement, which is not unexpected.

GPSMAP 67 vs GPSMAP 66sr

GPSMAP 67 vs GPSMAP 66sr v1.png

Déjà vu