1. Re: Really Arbitrary Points
    ... Yes, I have seen the Tropic of Cancer marked on a highway north of San Jose del Cabo (southern Baja California, Mexico). I imagine that it s marked in
    Jun 22, 2001 @ 20:22 - Ross Finlayson (Ross Finlayson <finlayson@...>)
  2. RE: [BoundaryPoint] Re: Really Arbitrary Points
    in vermont (usa) the 45th parallel is marked on the interstate highway. just south of the border station. bob beckett hollis, new hampshire ...
    Jun 22, 2001 @ 20:37 - Beckett, Bob ("Beckett, Bob" <Bob.Beckett@...>)
  3. Re: Really Arbitrary Points
    It is also marked in Maine. I think I have seen it on Route 1. There is a monument and a plaque that says something about being halfway to the north pole .
    Jun 22, 2001 @ 21:51 - bjbutler@bjbsoftware.com (bjbutler@...)
  4. RE: [BoundaryPoint] Re: Really Arbitrary Points
    I ve also seen it marked on U.S. 1 in the vicinity of Perry, Maine. Bill Hanrahan
    Jun 23, 2001 @ 00:03 - Bill Hanrahan (Bill Hanrahan <hanrahan@...>)
  5. Re: [BoundaryPoint] Re: Really Arbitrary Points
    And if it wasn t halfway to the North Pole, it wouldn t be the 45th parallel (Northern Hemisphere of course) in the first place. Bill
    Jun 23, 2001 @ 00:18 - Bill Hanrahan (Bill Hanrahan <hanrahan@...>)
  6. Re: [BoundaryPoint] Re: Really Arbitrary Points
    The Tropic of Cancer is also marked on a main highway south of Brownsville /Matamoros (TX/MX) on the way toward Tampico, at least it was in 1977. The Tropic of
    Jul 07, 2001 @ 17:33 - David Mark (David Mark <dmark@...>)
  7. Re: [BoundaryPoint] Re: Really Arbitrary Points
    Technically, of course, the 45th parallel is not precisely half way between the equator and the pole. It would be if the earth were a sphere. But since the
    Jul 07, 2001 @ 17:43 - David Mark (David Mark <dmark@...>)
  8. Re: Really Arbitrary Points
    David, how do you define vertical ? Surely not gravitationally because variations in rock density, elevation, and even geometrical latitude would produce
    Jul 07, 2001 @ 20:59 - bjbutler@bjbsoftware.com (bjbutler@...)
  9. Re: [BoundaryPoint] Re: Really Arbitrary Points
    You may be right, vertical may be defined by an ellipsoid approximating the geoid. I am sticking to my point that the degree of latitude varies systematically,
    Jul 07, 2001 @ 21:24 - David Mark (David Mark <dmark@...>)
  10. Re: Really Arbitrary Points
    Agreed. BJB ... approximating ... varies ... defined ... geometrical ... within ... earth s ... way ... were a ... but ... solid ... plane ... angle ...
    Jul 08, 2001 @ 01:03 - bjbutler@bjbsoftware.com (bjbutler@...)