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Old 04-18-13, 09:16 PM   #1
agent pombero
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smartphone GPS mapmyride app not accurate

I tried the mapmyride app and wasn't impressed. It showed the general route but throughout the route shows I somehow flew over/through buildings



Sometimes it says I turn into a kayak:



is the Garmin800 any better? does it accurately trace your route?

Also, I spent some time looking at elevation gain....which doesn't seem accurate but have no other device to compare it to.
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Old 04-19-13, 05:54 AM   #2
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Originally Posted by agent pombero View Post
I tried the mapmyride app and wasn't impressed. It showed the general route but throughout the route shows I somehow flew over/through buildings



Sometimes it says I turn into a kayak:



is the Garmin800 any better? does it accurately trace your route?

Also, I spent some time looking at elevation gain....which doesn't seem accurate but have no other device to compare it to.
If you're around tall buildings, GPS will have trouble locking on. That being said, your route does look pretty bad. Are you sure the phone had a GPS lock before starting?

As far as altitude, a hand-powered GPS device is going to do poorly. Garmin Edge 305, >500 have barometers to use pressure to measure altitude (which gets the absolute scale quite wrong but generally does pretty well on relative scale - how much you've climbed). In any case, most sites let you correct the altitude after the fact.
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Old 04-19-13, 07:07 AM   #3
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Tall buildings will interfere with the GPS path. Heavy woods too.

Here's my Garmin 705 recording, zoomed in. Each dot is a recorded point, one second apart, here color coded by speed. I rode north, then later returned and turned onto the side street. It's very accurate. You can see which side of the road I was on.



The 705 in downtown Cincinnati, with tall buildings on both sides. Lots of drift in the positions.

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Old 04-19-13, 08:03 AM   #4
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Make sure your phone is out in the open and not stuck in a bag or other obstructed item. It can make a difference.
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Old 04-29-13, 02:58 PM   #5
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I find it works great. Now we don't have much in the way of trees or tall buildings in my neck of the woods, but I can usually tell which side of the street I'm riding on, not to mention which street, etc.
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Old 05-01-13, 05:04 PM   #6
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Which smart phone?
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Old 05-01-13, 08:19 PM   #7
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They updated the app and it is significantly better
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Old 05-04-13, 03:49 AM   #8
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I tried MapMyRide again for a few weeks - first it transformed my 30 km ride to a 300 km one (the route on the map is right, but distance is very wrong), then it cut out in the middle of a 50 km ride. Funny, because last summer it worked well. Uninstalled it for the winter, and this spring it's a big mess. And no tall buildings or forest around - same route as the last year. My phone is LG Optimus One. How about the latest update (May 1)? Should I give it another chance?

Tried Endomondo during Thursday's bike orienteering event and it works as it should.
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Old 05-04-13, 04:46 AM   #9
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One thing to check is the interval between GPS recordings. Some phones seem to conserve battery by having longer intervals in between recorded points, dedicated GPS devices allow you to choose nearly real-time location info (1 second interval or so).
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