Thursday, Jan 09, 2003 at 08:52
Ozi,
I agree that the GDA94 datum is not on the 315 unit. However, as the co-ordinates achieved using this datum are only a few metres different from the WGS84 datum (and given the accuracy of ALL GPS units - anything upto 15 metres 'off'), the lack of this datum is not an issue. Same goes for AMG66/84 vs AUS66/84 (AUS66 and 84 are on the unit).
I don't know what the problem is with the Meridian aerials, but the quadrifialiar aerial on the 315 must be more like the SporTrak as I have never lost reception in trees, rocky outcrops, etc. (have lost it in tunnels, but then ALL units lose track when they can't 'see' the sky regardless of manufacturer), and that's with the unit mounted next to the A pillar in the corner of the dashboard - with no external or re-radiating aerial.
I also agree with your comments re the pricing of some units (though I couldn't find a Garmin with all the features of the 315 for anywhere near the same price, and yes I don't like the Etrex range either as they were options I investigated) and all accessories, however shopping around does lead to a number of bargains being found - I have purchased a combined 12 volt power/data cable as
well as a stand-alone data cable and a windscreen mounting bracket, and have only paid around half the RRP.
Obviously as far as manufacturers maps go, I'm not worried as the 315 isn't a mapping unit. I bought it for that particular reason. No screen on any unit is, in my opinion, big enough to warrant mapping - if I want to follow my progress on a map I'll link to a laptop with a decent screen - hence the data cables. To get such detail as metro street names, etc., on the units screens you have to go down to a very high level of detail and basically can't follow anything of your travel except the current 200 metres or so. Obviously this is a personal choice and many feel otherwise - whether they don't have a laptop or it's cheaper to buy the unit with mapping rather than also buy the laptop I don't know (guess it'd be hard to prop a laptop on the handlebars with the GPS!).
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