Magellan makes some GPS that include a GPS based compass to ignore the magnetic problems with some vertical assets. Will also work standing still, but uses batteries fairly fast with the compass turned on.
-----Original Message----- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of [EMAIL PROTECTED] Sent: Tuesday, January 29, 2008 4:00 PM To: WISPA General List Subject: Re: [WISPA] GPS We've been using the Garmin 70 and 60 series with altimeter (as opposed to elevation from map data). Garmin claims an accuracy of 10 feet "with proper calibration". Even with fluxgate, the electronic compass is unreliable near towers. Has anyone used a gyrocompass? ted On Tue, 29 Jan 2008, Travis Johnson wrote: > Mike, > > The elevation reading on a GPS is only accurate to within about 30 feet. > Using one to measure tower height is not going to product accurate results. > > Travis > Microserv > > Mike Hammett wrote: >> I am looking at getting a GPS device. I'd like it to work with many different programs such as Google Earth, Radio Mobile, Kismet, etc. >> >> What sort of features do I need it to have to work with these programs? >> >> I'd also like to have it be an independent unit with elevation so I can climb a tower and see exactly how tall it is instead of pulling a number out of you know where. >> >> Recommendations? >> >> >> ---------- >> Mike Hammett >> Intelligent Computing Solutions >> http://www.ics-il.com >> >> >> >> ---------------------------------------------------------------------------- ---- >> WISPA Wants You! Join today! >> http://signup.wispa.org/ >> ---------------------------------------------------------------------------- ---- >> >> WISPA Wireless List: [email protected] >> >> Subscribe/Unsubscribe: >> http://lists.wispa.org/mailman/listinfo/wireless >> >> Archives: http://lists.wispa.org/pipermail/wireless/ >> >> >> > > > ---------------------------------------------------------------------------- ---- > WISPA Wants You! Join today! > http://signup.wispa.org/ > ---------------------------------------------------------------------------- ---- > > WISPA Wireless List: [email protected] > > Subscribe/Unsubscribe: > http://lists.wispa.org/mailman/listinfo/wireless > > Archives: http://lists.wispa.org/pipermail/wireless/ > ---------------------------------------------------------------------------- ---- WISPA Wants You! Join today! http://signup.wispa.org/ ---------------------------------------------------------------------------- ---- WISPA Wireless List: [email protected] Subscribe/Unsubscribe: http://lists.wispa.org/mailman/listinfo/wireless Archives: http://lists.wispa.org/pipermail/wireless/ -------------------------------------------------------------------------------- WISPA Wants You! Join today! http://signup.wispa.org/ -------------------------------------------------------------------------------- WISPA Wireless List: [email protected] Subscribe/Unsubscribe: http://lists.wispa.org/mailman/listinfo/wireless Archives: http://lists.wispa.org/pipermail/wireless/
