gmt-dcw software package provides Digital Chart of the World (DCW) for GMT, 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-dcw
gmt-dcw is installed in your system.
Make ensure the gmt-dcw package were installed using the commands given below,
$ sudo dpkg-query -l | grep gmt-dcw *
You will get with gmt-dcw package name, version, architecture and description in a table
| Distro | Debian 9 stretch |
| Section | Science |
| Package | gmt-dcw |
| Version | 1.1.2-2 |
| Description | Digital Chart of the World (DCW) for GMT |
| Sub Section | Science |