Elevation query on a Garmin 520

[MissyR]

Has anyone had any problems or issues with their 520's recording strange elevation gains? I have done the same rides on the same bike for the last few weeks (winter miles on the mtb). Each time my elevation gains are completely different and some times a few hundred feet out. I do the ride with a group of friends and theirs are generally around the same but mines is out by a fair bit.

It's bugging my happiness. Any advice would be muchly appreciated.

 

[fossyant]

Wouldn't worry about it. Are you checking the garmin or the downloaded data on garmin connect or Strava ?

Changes in air pressure during the ride can affect data.

I have the software correct elevation gain.

 

[MissyR]

Wouldn't worry about it. Are you checking the garmin or the downloaded data on garmin connect or Strava ?

Changes in air pressure during the ride can affect data.

I have the software correct elevation gain.

All of the above. but surely if there are 2 on the same ride using the same configurations then they surely there shouldn't be 100's of feet of a difference. consider we ride side by side.

I have used the tool but but when i do it looks as though i'm doing a quarter of the climbing compared to everyone else.

 

[fossyant]

Unless it's under warranty then you is a bit knackered.

Are you using on road or off.

 

[MissyR]

Unless it's under warranty then you is a bit knackered.

Are you using on road or off.

even on club runs it off compared to others.

 

[fossyant]

It may be faulty. How out is it !?

 

[Crackle]

Have you set you base elevation above sea level and try leaving it out on the bike for 5 minutes before you set off.

 

[vickster]

Tried a factory reset? Download data first

 

[Crackle]

Tried a factory reset? Download data first

If you report it to Garmin this is the first thing they will tell you to do. Latest software, hard reset.

 

[MissyR]

It may be faulty. How out is it !?

It's about 100+ ft out with others using the same device on the same route.

Have you set you base elevation above sea level and try leaving it out on the bike for 5 minutes before you set off.

I usually switch it on in the car when i'm getting ready. But i've never set any elevations (don't know exact level)

Tried a factory reset? Download data first

Yup tried that and same result.

 

[mattobrien]

I found that setting elevation for a know location i.e. home made my Garmin more accurate. I have got an app called 'My Altitude' for my iPhone and sued that - I believe you can also us a computer to work out elevation at any given point too.

 

[Milkfloat]

If you really want to go to town you can get the airborne LIDAR data from https://data.gov.uk/dataset/lidar-composites-extents-coverage

I am using this for a little project right now.