For items go to 437 15, base cords would be around 200, 1800 this is so the world can be playable for everyone! If you like the map you can either like this if you hate it then you can keep it to yourself same if you like it. How to download the world you open the folder, then you go to the one starting with F1 and go to your bedrock edition files and go to world saves and place the file there!