This tutorial have been created from The European Map, but the install of the maps is the same process.
First dowload the files required for the map:
Go to the game files:
Go to map, paste the png images in backgrounds, paste the map files in the folder and edit the Age_of_Civilizations.json
Made a new line like this with the name of the map files:
Not modified: Modified file
And finally try the map.
In game captures:
The installed mod
Loaded the map
Connections of provinces
Sea provinces, my map have some bug 😛
Thanks for read