Found the following significant warnings:
  Warning: working directory was changed to ‘/home/hornik/tmp/R.check/r-devel-clang/Work/build/Packages/oceanmap/test_files’, resetting
  Warning: working directory was changed to ‘/home/hornik/tmp/R.check/r-devel-clang/Work/build/Packages/oceanmap/test_files’, resetting
  Warning: working directory was changed to ‘/home/hornik/tmp/R.check/r-devel-clang/Work/build/Packages/oceanmap/test_files’, resetting
  Warning: working directory was changed to ‘/home/hornik/tmp/R.check/r-devel-clang/Work/build/Packages/oceanmap/test_files’, resetting
  Warning: working directory was changed to ‘/home/hornik/tmp/R.check/r-devel-clang/Work/build/Packages/oceanmap/test_files’, resetting
  Warning: working directory was changed to ‘/home/hornik/tmp/R.check/r-devel-clang/Work/build/Packages/oceanmap/test_files’, resetting
  Warning: working directory was changed to ‘/home/hornik/tmp/R.check/r-devel-clang/Work/build/Packages/oceanmap/test_files’, resetting
  Warning: working directory was changed to ‘/home/hornik/tmp/R.check/r-devel-clang/Work/build/Packages/oceanmap/test_files’, resetting
  Warning: working directory was changed to ‘/home/hornik/tmp/R.check/r-devel-clang/Work/build/Packages/oceanmap/test_files’, resetting
  Warning: working directory was changed to ‘/home/hornik/tmp/R.check/r-devel-clang/Work/build/Packages/oceanmap/test_files’, resetting
  Warning: working directory was changed to ‘/home/hornik/tmp/R.check/r-devel-clang/Work/build/Packages/oceanmap/test_files’, resetting
  Warning: working directory was changed to ‘/home/hornik/tmp/R.check/r-devel-clang/Work/build/Packages/oceanmap/test_files’, resetting
  Warning: working directory was changed to ‘/home/hornik/tmp/R.check/r-devel-clang/Work/build/Packages/oceanmap/test_files’, resetting
  Warning: working directory was changed to ‘/home/hornik/tmp/R.check/r-devel-clang/Work/build/Packages/oceanmap/test_files’, resetting
  Warning: working directory was changed to ‘/home/hornik/tmp/R.check/r-devel-clang/Work/build/Packages/oceanmap/test_files’, resetting
  Warning: working directory was changed to ‘/home/hornik/tmp/R.check/r-devel-clang/Work/build/Packages/oceanmap/test_files’, resetting
  Warning: working directory was changed to ‘/home/hornik/tmp/R.check/r-devel-clang/Work/build/Packages/oceanmap/test_files’, resetting
Examples with CPU or elapsed time > 5s
          user system elapsed
plotmap  27.88  0.808  28.783
worldmap 17.58  0.520  18.137