The content owned by the municipality of Rostock and offered via this web application are made available under the Creative Commons Zero Universal 1.0 Public Domain Dedication (CC0 1.0). This means that you can do what ever you want with the data without having to ask for further permission.
This web application offered by the municipality of Rostock is based on Flask, a micro web framework written in Python. It is published under the free BSD License. Furthermore, the following libraries are used: