"mdavila78" <davila.milton@gmail.com> hath wroth:
>I was wondering if somebody knows how to monitor or track a person
>location.
With or without their knowledge?
With their knowledge is easy. They wear a 2-way radio or cell phone
with an attached GPS. There are several protocols in use such as
APRS. Such systems are in common use by public safety and utilities:
http://eng.usna.navy.mil/~bruninga/aprs.html http://n1vg.net/opentracker/ http://www.byonics.com/tinytrak/ http://www.csilocator.com http://www.theplanelocator.com
Lots more...
Without their knowledge is tricky. There are methods that require
wearing something. I don't want to go into details unless you really
need this.
Without their cooperation is also possible. See:
http://www.thedoglocator.net http://www.thecatlocator.com/locator/
Just lock one on the persons neck and follow them anywhere.
>I have a farm with many employees, the problem is that sometimes there
>are some employees who just "disappear" from the farm.
Any crop circles or evidence of alien abductions? Such activities are
known to cause people to temporarily disappear.
>I would like to find some kind of device that would allow me to monitor
>their position in the farm.
Perhaps surveillance cameras? See how prisons operate for details.
--
Jeff Liebermann
jeffl@comix.santa-cruz.ca.us
150 Felker St #D
http://www.LearnByDestroying.com
Santa Cruz CA 95060
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Skype: JeffLiebermann AE6KS 831-336-2558