Garmin brain fart

[Steve vRS]

I just uploaded my commute in this morning and the Garmin has recorded it in a very strange way!

It has recorded what would seem to be a realistic distance but the route is 'as the crow flies'. Any one else had this?

It's a Garmin 510 by the way.

Steve

Edit to remove route as it shows where I work!

Edited by Steve vRS on Tuesday 27th May 09:05

[marmitemania]

Not had this on My Garmin 510, but I had a Bryton and it did this once, the route on Strava showed that I had managed to cross a lake on my bike!!

[yellowjack]

Weird stuff happens to my Edge 500 when it's paused.

I stopped at the tailor's shop on barracks to drop off some work I needed doing, so paused my Garmin. I propped it up for about half an hour, then restarted it and completed my ride.

On uploading the data, I found that the bike had apparently been ridden in random zig-zags across the neighbouring sports pitches while I was indoors, despite it having been locked up!

[ALawson]

So you are telling me to buy a 810 then!

[Steve vRS]

ALawson said:

So you are telling me to buy a 810 then!

Yes.

And a new Dogma to mount in on. Just to be sure.

Steve

[esuuv]

This is Pistonheads isn't it - surely everyone has thrown their 810 away (so 2013) and replaced it with the 1000..........

[marmitemania]

810 is not as accurate as 510 which has the GPS linked to the Glonas satellite, all you gain with the 810 is full sat nav. Marianne Vos uses a 510, I know because I follow her on Strava.

[jesusbuiltmycar]

Sometimes I find my Garmin is not as accurate as Cyclemeter on the IPhone (which is pretty piss-poor as it is a dedicated GPS device).

[ALawson]

I had considered the 1000 although it's a lot bigger than either the 510 or 810.

Not planning on getting any sensors with it as the wahoo hr and speed/cadence sensor are blue+ so should work with it.

New bike, like the idea I should probably get a power meter as well!!!

[HereBeMonsters]

So all those topics where people told me to ditch my iPhone and buy a Garmin were just rubbish then?


FYI - it makes the "as the crow flies" route as it hasn't picked up the GPS for a while between those two points.

[Steve vRS]

It was 11miles as the crow flies!

How did it record a speed and distance though as on my CX bike I haven't got a cadence sensor?

Worked fine on the way home by the way.

Steve

Edited by Steve vRS on Tuesday 27th May 19:03

[yellowjack]

Steve vRS said:

It was 11miles as the crow flies!

How did it record a speed and distance though as on my CX bike I haven't got a cadence sensor?

I don't mean this to sound rude, and if it was a rhetorical question, I apologise in advance, but here goes...

My guess is that the Garmin picked the last known point before it lost GPS connection, and the point where it picked it back up again. Then it drew a straight line between the two points. Each exchange of data with the GPS satellite is 'time stamped', so it did the maths to work out how long it took to travel between those known points. Then the unit/post ride software divided the distance travelled by the time it took to travel, and came up with a speed.

[Steve vRS]

yellowjack said:

I don't mean this to sound rude, and if it was a rhetorical question, I apologise in advance, but here goes...

My guess is that the Garmin picked the last known point before it lost GPS connection, and the point where it picked it back up again. Then it drew a straight line between the two points. Each exchange of data with the GPS satellite is 'time stamped', so it did the maths to work out how long it took to travel between those known points. Then the unit/post ride software divided the distance travelled by the time it took to travel, and came up with a speed.

I don't think so as the route I rode was a loop of 16-17miles and the direct route I can ride to work is about 11miles.

Steve