[HOT] Recommendations for cheap "passive GPS trackers" / vehicle mountable GPS loggers?
borisC at osm-at.org
Fri Mar 2 13:07:16 GMT 2012
Today (Friday, March 2, 2012) at 05:39 your email client emitted:
> Just like to check with you if there are additional experiences
> with loggers worth to take into consideration for inclusion in a hot
> hardware kit to be deployed in projects.
> Curious about how the first two devices compare to the kind of res
> you get from garmin etrex legend hcx we have been mostly using in our work.
The WBT202 Logger uses the best available GPS chip AFAIK, the UBlox-5.
The Garmin uses an MTK chipset (unfortunately they do not specify
exactly which one). MTK chipset also have a very good reputation.
I have not made any direct comparison, but i daresay that it will beat
the garmins in bad conditions. It is not the overall performance that
makes a good receiver, it is the amount of accuracy drop that occures
in suboptimal conditions (badly positioned satellites or limited sky
view). Have you ever noticed a sudden systematic offset of measured
position while passing a high building? Its these things that happen
less often with a good receiver.
And there is one more thing to consider: You won't believe how much
difference the carrying position makes. A matchbox size device can be
carried on the shoulder, or even on your head, whereas a garmin device
will usually be carried on the belt.
Nevertheless, there may be differences, but only at the top of the
pyramid. The garmin extrex is far more versatile compared to a simple
logger that can only take tracks and unlabeled waypoints. On the other
hand, a logger is extremely simple to use: you press one button and
forget about it.
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