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Posting-Version: version B 2.10.2 9/18/84; site dciem.UUCP
Path: utzoo!dciem!tim
From: tim@dciem.UUCP (Tim Pointing)
Newsgroups: news.admin
Subject: Re: sites with bad #L fields in map entry
Message-ID: <2261@dciem.UUCP>
Date: Tue, 12-May-87 12:51:53 EDT
Article-I.D.: dciem.2261
Posted: Tue May 12 12:51:53 1987
Date-Received: Thu, 14-May-87 01:15:03 EDT
References: <1075@mit-amt.MEDIA.MIT.EDU>
Reply-To: tim@dciem.UUCP (Tim Pointing)
Distribution: net
Organization: D.C.I.E.M., Toronto, Canada
Lines: 53

In article <1075@mit-amt.MEDIA.MIT.EDU> henry@garp.UUCP (Henry Mensch) writes:
>Well, if you spent two or three lines describing the correct format it
>just might get done.  Not even a "RTFM" is appropriate if this is that
>simple and that important.  I'd describe the format myself (instead of
>bitching about it) but I don't know what it is.
>
I quote from the README that came with the latest version of the UUCP
maps (com.mail.maps):

# #L      latitude and longitude
# 
# This should be in the following format:
# 
# #L	DD MM [SS] "N"|"S" / DDD MM [SS] "E"|"W" ["city"]
# 
# Two fields, with optional third.
# 
# First number is Latitude in degrees (NN), minutes (MM), and seconds (SS),
# and a N or S to indicate North or South of the Equator.
# 
# A Slash Separator.
# 
# Second number is Longitude in degrees (DDD), minutes (MM), and seconds (SS),
# and a E or W to indicate East or West of the Prime Meridian in Greenwich,
# England.
# 
# Seconds are optional, but it is worth noting that the more accurate you
# are, the more accurate maps we can make of the network (including
# blow-ups of various high density areas, like New Jersey, or the San
# Francisco Bay Area).
# 
# If you give the coordinates for your city (i.e. without fudging for
# where you are relative to that), add the word `city' at the end of the
# end of the specification, to indicate that. If you know where you are
# relative to a given coordinate for which you have longitude and
# latitude data, then the following fudge factors can be useful:
# 
# 1 degree	=	69.2 miles	=	111 kilometers
# 1 minute	=	1.15 miles	=	1.86 kilometers
# 1 second	=	102 feet	=	30.9 meters
#
# For LONGITUDE, multiply the above numbers by the cosine of your
# latitude.  For instance, at latitude 35 degrees, a degree of
# longitude is 69.2*0.819 = 56.7 miles; at latitude 40 degrees,
# it is 69.2*0.766 = 53.0 miles.  If you don't see why the measure
# of longitude depends on your latitude, just think of a globe, with
# all those N-S meridians of longitude converging on the poles.
# You don't do this cosine multiplication for LATITUDE.
-- 
	Tim Pointing, DCIEM
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