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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.
    
    Dan
    
    -----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
    To: NAVIGATION-L@LISTSERV.WEBKAHUNA.COM
    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.
    
    George.
    
    ================================================================
    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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