This is project part of the bachelor thesis of Martin Thoma. All source files are on GitHub.

If you want to identify a single symbol, I've added some hints here.

You can file issues / bugs in the Issue Tracker or alternatively send me an email. You can contact me via

Technical and Scientific Information

If you want to know more about how works from a technical / scientific perspective, please go to



This website was / is mainly developed by me (Martin Thoma), but many people contributed to it. Here are some of them:

Thank you for helping me to build this service!


Most of the data is availabe here.

Used Open Content