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  27.025  0.722  41.435
worldmap 16.316  0.722  24.208