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GPS Units(4 posts)

GPS Unitsblownpupil
Sep 5, 2003 6:56 AM
Does anyone use a handheld GPS when they're road riding? As I learn more about them, I see they are great for keeping track of speed, distance, as well as original intended purpose of locating oneself. Graphic representation of your route is possible, etc. Timex/Garvin also makes one which incorporates HRM/irnman watch.

Useful?
I use an older one for mapmaking ...Humma Hah
Sep 5, 2003 9:13 AM
I have an old Magellan that lacks some useful features like an external antenna and a computer interface. I do use it for mapping new trails, but it is tedious. It also eats batteries by the handful, a set of AA's about every 4 hours. A better-featured one that draws less power might be handy for mapping cycling routes, especially if tied to map software like Topo USA.

GPS has its place, but it also has its limitations. I work with GPS technology in my day job ... horizontal position is good to about 8 meters, but altitude is unreliable by as much as a few hundred meters. They are pretty good at speed in a straight line, but most consumer units are not great at speed while turning. Total distance traveled is unreliable at slow speeds, as when walking, due to the position jitter they experience even when sitting still. For speed and distance, I don't think they're as good as a $14 cyclocomputer. For total climbing, they're not quite as good as my admittedly imperfect altimeter cyclocomputer.
Is it a Model 310?pitt83
Sep 5, 2003 10:18 AM
Please email me how you collect points to map with it. I had a club bought Garmin, but it got pretty banged up on a MTB ride and we have no budget to fix or replace it. I have a personal Magellan310 but can't figure out how to collect data with it.

pitt83 at yahoo dot com

Thanks HH!
SureJervis
Sep 5, 2003 9:17 AM
I like using one. Went on a century with a buddy and neither of us had a computer on our bikes, so we took his GPS unit and strapped it to his stem with an old hockey shin guard strap I had lying around. Really accurate (gets off a bit in hills and woods) and gives you, as you said, an apt representation of your route. Rain can be a problem though, make sure you get a water resistant unit/plastic bag. Strap it down and ride.

Jervis