Track chart to map

[NW Mailing List]

Thanks, Harry.  I searched the database and found a few that might be
pertinent and am working up and order.
Jim Cochran


On Wed, Jul 16, 2014 at 9:58 AM, NW Mailing List <nw-mailing-list at nwhs.org>
wrote:

>
>
>   It occurs to me that I ought to be able to construct a scale map of the
> line from the information contained in a track chart.  The chart gives the
> curvature, direction and distance for each segment relative to the previous
> segment.  So, if I (1) construct a tangent to the previous segment then (2)
> draw a line to the right or left (as indicated on the chart) at an angle
> equal to the curvature of the next segment for the proper length and (4) do
> this for several segments then (5) draw a smooth curve that passes through
> the segment endpoints, will I end up with a good representation of the line?
> Jim:
> After you accomplish this, you may end up with what's already in
> the archives -- right-of-way drawings.  The track charts are a straight
> line representation, but the right-of-way drawings include actual
> curvature.  As I recall, length is expressed to the nearest 10th
> of a foot.  Distance is measured from the "0" mile post and is
> expressed in numeric terms (minus the last two digits).
>
> Don't know if the territory you're looking for is in the archives
> files, though.                      Harry Bundy
>
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