What softwares can I use to make maps of:
ethnic distribution, very detailed map like this one: https://en.wikipedia.org/wiki/File:Austria_Hungary_ethnic.svg
Linguistic distribution (I cannot paste link here because not enough reputation).
Territorial division (I cannot paste link here because not enough reputation).
I'm planning to make ethnic and linguistic distribution maps of South China region. I wonder if anyone of you, who is expert on map making, knows what kind of software (free softwares only) should I use to create such high quality and detailed maps for South China region. I would make them and then upload on Wikipedia.