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    1. Re: GPS units
    2. singhals
    3. Dennis Lee Bieber wrote: > On Fri, 14 Dec 2007 11:29:11 -0500, singhals <singhals@erols.com> > declaimed the following in soc.genealogy.computing: > > > >>Yeah, it'll show me the street address and the map location, >>but NOT the lat/lon. >> > > Sounds more like something from TomTom, meant to give driving > directions for on-road usage... > > Even the smallest Garmin eTrex model should handle what you want > https://buy.garmin.com/shop/compare.do?cID=144&compare=compare&compareProduct=6403 > 500 waypoints; they don't mention how many coordinate systems and datums > are supported. Typically you can toggle the coordinate system after > recording a waypoint in one format to view it in another. You'll also > want to take note of the datum -- native for GPS is WGS-84, but most > USGS topographic maps are still in NAD-27; to use a coordinate from the > GPS you'd want to set the datum to NAD-27 so the numbers match what the > map was referenced against. > > My current unit is > https://buy.garmin.com/shop/compare.do?cID=145&compare=compare&compareProduct=351 > 1000 waypoints/50 routes (digging up my manual as the site doesn't > mention how many points per route -- 50 routes of 250 points each). This > unit is probably more than you are interested in (and 4.5 times the $$$ > of the basic eTrex). It even has a parachute "jumpmaster" program in > which you preload expected winds at altitude intervals > (speed/direction), the expected jump altitude, the expected chute open > altitude (HALO freefall jump or immediate chute open HAHO no freefall), > and the landing site -- the program will then indicate where/when you > reach an appropriate jump location to account for wind drift. And silly > games (a virtual "whack-a-mole" where you have to run over something the > size of a football field to get to the "mole" before it disappears). I > have it loaded with the extra$$ US street and Topo maps for California, > Nevada, Oregon, Washington, and Michigan -- took about 200MB of a 1GB > memory cartridge. > > >>Except, I _understand_ lat/lon (g). >> > > As mentioned, you can change the coordinate units at any time and > see the waypoints in that way. > > >>There's a stream nearby but nothing else guaranteed not to > > > Don't trust a stream... a few springs of good flooding could move > its channel a few dozen feet <G> Why, you li'l ol' optimist, you! (G) I'll take a longer look at Garmin. Thanks. Cheryl

    12/16/2007 04:39:22