[R-sig-Geo] How select the “contour” cells of a raster file

[Camille Leclerc]

Dear all,

I will expose my issue with an example: I have a temperature raster at world
scale and I want select or identify the “contour” cells of this raster. More
clearly, I define “contour” cells as cells which are adjacent to ocean. The
issue is that my raster file contains only terrestrial data and no ocean
data. I looked the functions of the raster package like clump() but it
doesn’t resolve my issue.
I have no idea how resolve this? Must I create an ocean raster or a simple
function exists?

Best, 
Camille
--
Camille Leclerc
Post-Master student
Lab ESE, UMR CNRS 8079
Univ Paris-Sud
Bat 362




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