cyclograph-gtk3 software package provides route altimetry plotting application - GTK3 interface, 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 cyclograph-gtk3
cyclograph-gtk3 is installed in your system.
Make ensure the cyclograph-gtk3 package were installed using the commands given below,
$ sudo dpkg-query -l | grep cyclograph-gtk3 *
You will get with cyclograph-gtk3 package name, version, architecture and description in a table
| Distro | Debian 9 stretch |
| Section | Miscellaneous |
| Package | cyclograph-gtk3 |
| Version | 1.7.1-1 |
| Description | route altimetry plotting application - GTK3 interface |
| Sub Section | Miscellaneous |