Lost. I just can't find it

[greyslates]

Hi All, sorry for what is prob a dumb question, but I am stuck.
Have been playing No Mans Land for a while now and would like to add a couple of items to the Map.
I unzip NoMansLand.zip from the Documents/My Games/FarmingSimulator2019/Mods folder, then use GE to view the map i3d file, but it's the original map that AlienJim created . .
In order to place a couple of buildings precisely I need to be on the NoMansLand map that I have changed (felled trees, created fields etc) during my months of play ??
I've looked everywhere lol. And watched so many Vids . . . yet am still no wiser.
Where do I find it please ?
Keep up the great work.
TIA.
Cheers.