Hi,


I've generated random segment patterns with spatstat::rpoisline so as to
plot differences of profile lines between two different digital elevation
models.

Now, I want to use raster::extract function to get the raster values on
both rasters for each segment but for this, I have to coerce a psp to a
SpatialLines object but I don't know how to do the coercion. (SpatialLines
to psp is OK).
as(psp, "SpatialLines") doesn't seem to work.


Any help would be appreciated,

Mathieu

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