[Talk-us] US-Canada Border between BC and Washington State

Paul Norman penorman at mac.com
Tue Sep 18 01:49:59 BST 2012

The survey points are based on IBC data (which they view as PD) and are
supposed to be accurate within a few cm and the limits of NAD83 to WGS84
conversion (a few more cm).


I've verified a few by the lower mainland with survey and against a few
sources of accurate imagery and their data seems accurate within the limits
of the imagery.


You can see a clearing along parts of the border in that area so it's
accurate to within 20 meters.


I know that Washington State argued that they were not responsible for the
border costs in Blaine because it was not part of the state since the state
ended at the 49th parallel and the border is north of the 49th there.


What I'll do is go and eliminate duplicate border ways, like I did with the
lower mainland.



From: Clifford Snow [mailto:clifford at snowandsnow.us] 
Sent: Monday, September 17, 2012 4:49 PM
To: talk-us
Subject: [Talk-us] US-Canada Border between BC and Washington State


I've been doing some work in the North Cascades National Park. It appears
that the border between the US and Canada is wrong.  Look at

It appears that the boarder sags to the south. I see tags man_made =
survey_point which would indicate that the border placement is correct. Can
anyone recommend how to validate the border placement?




I have promised to cut down on my swearing and drinking, which I have.
Unfortunately, this has left me dim-witted and nearly speechless. Adapted
from The Lion by Nelson DeMille




If you can't explain it simply, you don't understand it well enough.  Albert


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