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    Re: Atlases
    From: Dan Allen
    Date: 2004 Jul 19, 17:12 -0700

    In the US the "Rand McNally 2004 Road Atlas: United States, Canada,
    Mexico" has small latitude/longitude marks; the other road atlases
    (AAA, Delorme, etc.) do not.
    One of the best buys in an atlas is to buy the standard Rand McNally
    Road atlas at a Wal-Mart store - for $4.95.  It is the same as the $10-12
    Rand McNalley Road atlas found everywhere else, but Wal-Mart adds a
    small index to their stores and charges half the price.
    Note: online at walmart.com it is $10, but in the stores it is $5.
    -----Original Message-----
    From: Navigation Mailing List
    [mailto:NAVIGATION-L@LISTSERV.WEBKAHUNA.COM]On Behalf Of George Huxtable
    Sent: Monday, July 19, 2004 4:59 PM
    Subject: Re: Nevil Maskelyne.
    Peter Fogg said-
     One problem with closely
    >settled places like this is that they may have lots of local roads (indeed
    >entire villages with their churches
    >hiding outside the place) that are just not shown on the national map that
    >has been carefully acquired. Its
    >a problem I've also found just on the other side of the Channel. With the
    >GPS the local roads and laneways
    >can be tackled with some confidence if the bearing and distance to target
    >are known, although some tracks
    >may turn out to be dead-ends.
    >Go very carefully down those narrow lanes. The locals have a terrible
    >habit of driving far too fast along
    >them. And on the wrong side of the road.
    He must have met me...
    My guess is that Peter must be discussing travel in France. To drive in
    France, what's needed is the 1:200,000 Michelin Motoring Atlas, not a
    "national map". There aren't many villages or churches missing from that!
    Similarly, to drive in Britain what's needed is a 1:250,000 road atlas
    (about 4 miles to the inch).
    The trouble with many road atlases is in their gridding. In many cases, the
    grid markings relate only to each map-page and are unrelated to the
    gridding of adjacent map-pages and bear no relation to a national
    coordinate system or to latitude or longitude or WGS84. So there's no way
    to relate them to coordinates taken from a GPS receiver.
    With some receivers, you can select display in National Grid coordinates,
    which if it includes Britain would mean OSGB36 (Ordnance Survey of Great
    Britain 1936). You can buy a Road Atlas produced by the Ordnance Survey
    (it's a bit more expensive than the others, as you might expect) which is
    to National Grid, as are some of the Atlases marked "AA" (automobile
    association) but not others. I know of none marked with lat and long.
    Local map sheets; "Serie Bleu" in France, 1:50,000 series in Britain, do
    carry lat and long tick-marks around the edge, but widely spaced, so
    they're not very useful.
    contact George Huxtable by email at george@huxtable.u-net.com, by phone at
    01865 820222 (from outside UK, +44 1865 820222), or by mail at 1 Sandy
    Lane, Southmoor, Abingdon, Oxon OX13 5HX, UK.

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