Found the following significant warnings:
  Warning: working directory was changed to ‘/home/hornik/tmp/R.check/r-devel-gcc/Work/build/Packages/oceanmap/test_files’, resetting
  Warning: working directory was changed to ‘/home/hornik/tmp/R.check/r-devel-gcc/Work/build/Packages/oceanmap/test_files’, resetting
  Warning: working directory was changed to ‘/home/hornik/tmp/R.check/r-devel-gcc/Work/build/Packages/oceanmap/test_files’, resetting
  Warning: working directory was changed to ‘/home/hornik/tmp/R.check/r-devel-gcc/Work/build/Packages/oceanmap/test_files’, resetting
  Warning: working directory was changed to ‘/home/hornik/tmp/R.check/r-devel-gcc/Work/build/Packages/oceanmap/test_files’, resetting
  Warning: working directory was changed to ‘/home/hornik/tmp/R.check/r-devel-gcc/Work/build/Packages/oceanmap/test_files’, resetting
  Warning: working directory was changed to ‘/home/hornik/tmp/R.check/r-devel-gcc/Work/build/Packages/oceanmap/test_files’, resetting
  Warning: working directory was changed to ‘/home/hornik/tmp/R.check/r-devel-gcc/Work/build/Packages/oceanmap/test_files’, resetting
  Warning: working directory was changed to ‘/home/hornik/tmp/R.check/r-devel-gcc/Work/build/Packages/oceanmap/test_files’, resetting
  Warning: working directory was changed to ‘/home/hornik/tmp/R.check/r-devel-gcc/Work/build/Packages/oceanmap/test_files’, resetting
  Warning: working directory was changed to ‘/home/hornik/tmp/R.check/r-devel-gcc/Work/build/Packages/oceanmap/test_files’, resetting
  Warning: working directory was changed to ‘/home/hornik/tmp/R.check/r-devel-gcc/Work/build/Packages/oceanmap/test_files’, resetting
  Warning: working directory was changed to ‘/home/hornik/tmp/R.check/r-devel-gcc/Work/build/Packages/oceanmap/test_files’, resetting
  Warning: working directory was changed to ‘/home/hornik/tmp/R.check/r-devel-gcc/Work/build/Packages/oceanmap/test_files’, resetting
  Warning: working directory was changed to ‘/home/hornik/tmp/R.check/r-devel-gcc/Work/build/Packages/oceanmap/test_files’, resetting
  Warning: working directory was changed to ‘/home/hornik/tmp/R.check/r-devel-gcc/Work/build/Packages/oceanmap/test_files’, resetting
  Warning: working directory was changed to ‘/home/hornik/tmp/R.check/r-devel-gcc/Work/build/Packages/oceanmap/test_files’, resetting
Examples with CPU or elapsed time > 5s
           user system elapsed
plotmap  25.838  0.878  39.668
worldmap 16.410  0.523  25.209