[R-sig-Geo] Converting a line feature to evenly spaced points

[Ezra Boyd]

Hi Everyone,

I have a line feature that represents a road/trail along with a set of
GPS points taken along the trail.  What I need to do is calculate the
distance along the pathway from the trailhead to each GPS point.  The
best way that I can think of to accomplish this is to convert the line
feature to evenly spaced points (preferably 1 meter or 1 foot apart.)
However, all of the line-to-point conversion tools that I have found
simply create the points based on the nodes of the line feature.  But, this
won't help me because I know that the nodes are not evenly spaced.
Does anyone know of a line-to-point conversion tool that creates
evenly spaced points?  Otherwise, does anyone have other ideas of how
I can accomplish what I need to accomplish?

Thanks,
Ezra