V1.31, no mods, gigantic map and choosing a custom race with the default technologies, and hence stellar cartography, only gives an empty mini-map.

I tried re-loading the game and unchoosing and rechoosing stellar cartography and same result.

Also choosing Technologists as the political party did not seem to give any research advantage until I reloaded - ion engine reserach time went from 7 weeks to 6 weeks.

GM12