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10/04/2009 3:33:37 PM
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cklfc
Posts 22
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After a fair bit of searching and trial and error, have found a great website for plotting courses which also gives an easy to read elevation profile and summary sheet to print out. Thought I would share it as I'm quite impressed with it...
http://www.bikeroutetoaster.com/
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15/04/2009 10:49:14 AM
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ANDREW ROWLING
Posts 3
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Thanx for that, gmap-pedometer worked good until trying to plot the Old Freeway, same problems happen when plotting Mortirolo-it collapses in a heap when looking up altitude data.
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16/04/2009 7:53:22 AM
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Philip Knight
Posts 22
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I find bikely the easiest to draw the route and look at the elevation data. If you want, export the GPX file which can be opened in Google Earth. With the tilt and camera ranges adjusted you can fly the route.
With the GPX file saved, I then open the file in bikeroutetoaster, have it add the elevation data there and send the TCX file to my Garmin 705 for navigation/elevation profile on the ride.
The advantage with Bikely over Bikeroutetoaster is the access to other rides that have been entered by other users. And Bikely's ability to auto follow the road saves time in plotting the route. But Bikeroutetoaster has the advantage in that it makes the TCX file which is read by the Garmin as a 'Course'
I then email the TCX file link to friends who also have the Garmin 705
Then for longer rides I add the drink stops...
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16/04/2009 8:08:48 AM
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Adam Thompson
Posts 16
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I like the elevation profiles you get from www.mapmyride.com - you get colours that show the gradients during the climb.
For example, here's Windy Point, click the box on the right that says Show Elevation: http://www.mapmyride.com/route/au/belair/701123983325643521
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7/05/2009 5:52:18 AM
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jamie wie
Posts 8
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Looks great, cheers mate.
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7/05/2009 8:20:04 AM
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Philip Knight
Posts 22
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The elevation profile and gradients shown on any online mapping are going to be as good as the base data. It is my understanding that the base data used for online mapping is generated from a data grid no closer than 90 metres apart. On flat terrain this is good enough. However when a road tilts upwards and the road is cut into the side of a steep hill, the generated elevation may be out.
For example if you pick the Windy Point/Belair ride, the online mapping has a downhill section part way up the climb. The same ride logged with a GPS data logger (Garmin 705 using barometric pressure for altitude) shows that the road is still going up although at a lesser rate. see chart The logged gradient is more reliable on a constant slope and is a guide, nothing more. This is because it only calculates the gradient between each of the logged points. During a ride you get the see the constantly changing gradient, only to be disappointed when a new PB for gradient (or any other recorded data) did not coincide with the logged point.
The steeper the hill, and more the gradient changes relative to adjacent ground, the less reliable the generated elevation and, in particular, the gradient. Keeping this in mind, the online mapping can be informative for the bigger picture. I hope this helps.
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