map server

I have used google maps using B4a and b4i for years, and have not had major issues. But every time i try and use it with B4j, I do not get very far. I assume i need a specific key for B4j. Having said that, I am not sure which Google Map services i need to request. There are services for android...

because i not want pay money for google maps i found a self hosting map server system to display a area via a simple url etc. for linux there are only 2 steps and the setup is running (theory :mad:) (at Debian 10 i had trouble to install docker first.) for non-commercial or education the map...