ridewithgps / bikeroutetoaster total elevation

Lucky Douglas
Posts: 155
I've clicked round a 4 day route in ridewithgps and the total elevation came in at 11,500 ft.
That was more than I was expecting so I did the same route on bikeroutetoaster and it reckoned 6,400 ft.
I know these are estimates, but wouldn't have expected such a variance. Does anyone know how they arrive at these figures? Any ideas why such a difference?
That was more than I was expecting so I did the same route on bikeroutetoaster and it reckoned 6,400 ft.
I know these are estimates, but wouldn't have expected such a variance. Does anyone know how they arrive at these figures? Any ideas why such a difference?
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Comments
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From the RideWithGPS.com FAQ: http://ridewithgps.com/faq#elevation_accuracyMany people contact us to tell us our elevations are not the same as they see on their altimeter/GPS units, Garmin Connect, MMR, etc. Unfortunately, this is always going to be the case because no one actually has 100% accurate elevation information. In reality, there is no sure fire way to exactly calculate the gain/loss of a particular route! However, we can get as close as possible to accurate, which is a difficult task. Currently, we are using some complex signal processing analysis to smooth out elevation data recorded from either your GPS unit, or from the USGS elevation dataset we use when mapping a new route. We believe we have the most accurate elevation data of any online mapping service, however, we are always wanting to improve it. Please contact us if you have experience processing noisy datasets using signal processing techniques or statistical analysis and have any ideas that could help. We would love to hear from you!Summer - Canyon Ultimate CF SLX 9.0 Team
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For getting dirty - Moda Canon0 -
Gizmodo wrote:From the RideWithGPS.com FAQ: http://ridewithgps.com/faq#elevation_accuracyMany people contact us to tell us our elevations are not the same as they see on their altimeter/GPS units, Garmin Connect, MMR, etc. Unfortunately, this is always going to be the case because no one actually has 100% accurate elevation information. In reality, there is no sure fire way to exactly calculate the gain/loss of a particular route! However, we can get as close as possible to accurate, which is a difficult task. Currently, we are using some complex signal processing analysis to smooth out elevation data recorded from either your GPS unit, or from the USGS elevation dataset we use when mapping a new route. We believe we have the most accurate elevation data of any online mapping service, however, we are always wanting to improve it. Please contact us if you have experience processing noisy datasets using signal processing techniques or statistical analysis and have any ideas that could help. We would love to hear from you!
The route is the the NCN45 - anyone know whether 6000ft or 11.500ft is nearer the mark? .0 -
Gizmodo wrote:From the RideWithGPS.com FAQ: http://ridewithgps.com/faq#elevation_accuracyMany people contact us to tell us our elevations are not the same as they see on their altimeter/GPS units, Garmin Connect, MMR, etc. Unfortunately, this is always going to be the case because no one actually has 100% accurate elevation information. In reality, there is no sure fire way to exactly calculate the gain/loss of a particular route! However, we can get as close as possible to accurate, which is a difficult task. Currently, we are using some complex signal processing analysis to smooth out elevation data recorded from either your GPS unit, or from the USGS elevation dataset we use when mapping a new route. We believe we have the most accurate elevation data of any online mapping service, however, we are always wanting to improve it. Please contact us if you have experience processing noisy datasets using signal processing techniques or statistical analysis and have any ideas that could help. We would love to hear from you!0
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Lucky Douglas wrote:The route is the the NCN45 - anyone know whether 6000ft or 11.500ft is nearer the mark? .0
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rothers_bikeo wrote:Lucky Douglas wrote:The route is the the NCN45 - anyone know whether 6000ft or 11.500ft is nearer the mark? .
I've got memorymap myself but hadn't thought to try what you suggested. What it did show up is that the ridewithgps file is nacked.
I think I'm going to have to click the whole thing into memorymap from scratch!0