cyclograph-qt4 software package provides route altimetry plotting application - Qt 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-qt4
cyclograph-qt4 is installed in your system.
Make ensure the cyclograph-qt4 package were installed using the commands given below,
$ sudo dpkg-query -l | grep cyclograph-qt4 *
You will get with cyclograph-qt4 package name, version, architecture and description in a table
| Distro | Debian 9 stretch |
| Section | Miscellaneous |
| Package | cyclograph-qt4 |
| Version | 1.7.1-1 |
| Description | route altimetry plotting application - Qt interface |
| Sub Section | Miscellaneous |