HN thread with more discussion (linked to the github repo this project): https://news.ycombinator.com/item?id=14314045

Nice idea, although I would argue this is a comparably small subset of "anything".

A search function would be nice, e.g. if I search for rock climbing it would display something like

health->physical->fitness->rock climbing

The search engine for this mind map is in works and will essentially do what you have described. User types a query and it will jump to the correct place in the mind map.

If you want to help create it, please do. There is a slack group for the project.

slack group: https://knowledge-map.slack.com/

search engine: https://github.com/nikitavoloboev/knowledge-map-search-engin...

This looks interesting. I'll have to take some time and explore it later.

how to use it?

You can just click the link (http://bit.ly/learning-mind)

Choose a topic you would like to learn and click on it. Emojis have meaning and here is what they mean (https://github.com/nikitavoloboev/knowledge-map#documentatio...). I hope you find something interesting.