[R-sig-Geo] Distance of points along an irregular linear feature - not quite "alongTrackDistance" in geosphere

[Rawlins, Barry G.]

Hello

I would like to compute distances between a series of points along an irregular linear feature (in this case a river channel). We have 36 sampling locations along the channel and I want to compute the downstream distances of each from the start of the channel. It appears that the function alongTrackDistance in the "geosphere" package does this for a regular path but not an irregular one. Do you know if there is a package/function that would do so for an irregular path? I have done some searching but cannot find anything.

I assume the computations necessary to do this would discretise a linear feature into a series of points and measure the cumulative distance along it.

Best wishes, Barry


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