It also includes most of current Romania and full Moldova, but excludes Transcarpatia. If you want to use it as some kind of justification of current events, this is a very slippery slope, everyone can find a map showing what they want and the total opposite.
I don't know what the coloring means on the map, it seems like from the texts it want to show the big yellow patch is Ukraine proper, and the colored parts are some dependants.