gmt-gshhg-high software package provides High resolution coastlines for the Generic Mapping Tools, you can install in your Debian 9 (Stretch) by running the commands given below on the terminal,
$ sudo apt-get update $ sudo apt-get install gmt-gshhg-high
gmt-gshhg-high is installed in your system.
Make ensure the gmt-gshhg-high package were installed using the commands given below,
$ sudo dpkg-query -l | grep gmt-gshhg-high *
You will get with gmt-gshhg-high package name, version, architecture and description in a table
| Distro | Debian 9 stretch |
| Section | Science |
| Package | gmt-gshhg-high |
| Version | 2.3.6-2 |
| Description | High resolution coastlines for the Generic Mapping Tools |
| Sub Section | Science |