I don't own a Smartphone. Would a Garmin Edge 810 be wasted on me?

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derrick

The Glue that binds us together.
800 here and well happy with it, does everything i need.:thumbsup:
 
OP
OP
slowmotion

slowmotion

Quite dreadful
Location
lost somewhere
@slowmotion
have you bidded on this? i reckon it could be a very good deal

otherwise i would say go and get one from handtec, again very good deals on normally rather expensive devices and you even have ian on here saying it's good :smile:
Cheers Ed
No, I don't want to bid if it's coming from the States. It might fall into the clutches of HMRC in which case I could get a hefty bill for Vat, duty etc. It's happened to me before. I think I'll seek out a new Touring Plus.

Edit: Maybe from Bike Discount
http://www.bike-discount.de/en/buy/..._country=190&gclid=CN7I_ov468ICFc3LtAodRmsAxw
 
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ColinJ

Puzzle game procrastinator!
I think one of the differences is that the Plus has a barometric altitude sensor which is more accurate than a simple GPS version.
The GPS-based elevation readings on my old Etrex are usually within 20 m of what they should be and often with 10 m. That is as compared to OS map data for local summits. (I read that GPS elevation calculation is supposed be poor, but it seems pretty good to me.)
 

ColinJ

Puzzle game procrastinator!
I have found an old ride tracklog of mine. I'll see if I can do some graphical wizardry and superimpose the GPS elevation data against the actual OS data for the same ride to show you how close they are.

One thing the GPS data does show is a huge elevation glitch at the start of the ride. I probably didn't give the GPS time to lock onto the satellites properly before setting off. Modern GPS devices lock on much better than old ones like mine.

Graphics to follow ....
 

ColinJ

Puzzle game procrastinator!
I am quite impressed!

GPS vs OS elevation.gif


You can see the big glitch I mentioned. Interestingly, the smaller lump below it is also a glitch in the OS data on my map software - I live at about 110 m but a lump at about 145 m is shown. That is probably because I am right next to a steep hill, so a few metres error in position would make the software think I was halfway up the slope!

The big climb is the Crag Vale one that I mention a lot. In fact, this is the profile of my favourite local loop.

The discrepancies on the climb are partly due to the fact that the road climbs up a steep-sided valley, so again, a few metres lateral error can fool the mapping software into thinking that I am halfway down to the river below, or the hillside above.

You can see that the plots for the summits are remarkably close.

The fast descents did catch the GPS elevation calculation out, or it could be because the last descent is under heavy tree cover which disrupts the signal to my GPS a bit. (Modern devices are far better at hanging onto satellite lock.).
 
OP
OP
slowmotion

slowmotion

Quite dreadful
Location
lost somewhere
Thanks for that @ColinJ. I bow down with respect to your hill-climbing skills and your technological savvy, both of which are severely lacking hereabouts.
I love paper maps and map reading. My only reason for considering a GPS was to enable me to take wiggly routes in new territory. If I have to dig out the map at every junction in a strange lane, it really slows me down. Besides, if it's raining, the map falls to bits. I have used paper maps on long distance routes and had a lot of fun. For wiggly ones, a GPS would save a bit of trouble, I hope.
 
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