[Talk-us] BC/Washington border

[Clifford Snow]

On Wed, Jan 9, 2013 at 10:14 AM, Paul Norman <penorman at mac.com> wrote:

> On the west coast the Canada/US border is defined as the line formed from
> a bunch of survey points. These points can be surveyed or seen on imagery.
> I used the IBC positions for the points which are far more accurate than
> anything I could of done. In theory they could be improved, but the
> accuracy limit of the DB might be an issue.
>
> I verified the data with multiple other sources and they all agreed within
> the limits of the sources.
>
> The tricky part was making the lines straight where they joined up with
> cities, etc.
>
> I would not suggest using state data for the Canada/US border.
>

Thanks - I won't. I hadn't even gotten to the comparing the State
boundaries with OSM. I do want to thank you for getting me interested.
TIGER is probably great for for taking census, but certainly has some room
for improvement in other areas. Knowing that boundaries can be suspect
should push us to find other sources such as Andrew's goal of improving
boundaries in VT.

-- 
Clifford

OpenStreetMap: Maps with a human touch
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