On Tue, 15 Nov 2011, Mathieu Rajerison wrote:
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.
The coercion functions in maptools, contributed by Adrian Baddeley, go
from SpatialLines to psp, not the reverse. You need to create the set of
coercion methods to go the other way - contributions welcome!
Roger
Any help would be appreciated,
Mathieu
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Roger Bivand
Department of Economics, NHH Norwegian School of Economics,
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