Benoit questions

Benoit answers

• Creating bathymetric lines from getNOAA.bathy and add them to ggplot: how do I homogenize the bathymetric lines?
• Add bathymetry lines to ggplot using marmap package and getNOAA.bathy
• How to make a CRAN package to download data only once regardless of OS?
• Overlap image plot on a Google Map background in R
• How can I put a scalebar and a north arrow on the map (ggplot)?