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Upcoming climbs - same .gpx and completely different data

RobertStrgar
over 2 years ago

I have a question about upcoming climbs. I import the same gpx file to Garmin Connect and Ride with GPS. When I sycned my Edge 530 I got 2 completely different information about upcoming climbs.

Does anybody knows where is the problem?

 

  • 0 over 2 years ago

    I would guess that Connect has a different elevation model than RwGPS and when you import the GPX file into each system they add their own elevation data.  As the elevation data is different you get different climb data created from the routes.

  • 0 over 2 years ago in reply to Wongataa

    So, how to know which one is more reliable? 

  • 0 over 2 years ago in reply to RobertStrgar

    You don't know which is more reliable.  It could well vary in different locations too.  You will just have to pick one and hope it is close enough to reality.

    Probably the best climb data you can easily get will be had by riding the route yourself and recording it.  The create a route from your recorded ride.  Then the elevation data will be what your Edge unit recorded.

    Elevation data from online route planners will never be 100% reliable. Route planner providers can't afford to buy high quality elevation mapping data from national mapping agencies around the world so they make do with the freely available data sourced from NASA Shuttle mapping missions.  Strava say they augment this data with elevation data collected from rides uploaded to them from devices with barometers.  How much of a difference it makes I don't know.