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Factorio

Server Information

World Generation Settings

Overview

Specifying world generation settings is a fairly simple task when creating a new world.

The steps to do so are as follows:

  1. Delete any existing world data
  2. Modify map-gen-settings.json
  3. Use the Factorio executable to generate a world with that json
  4. Run Factorio as normal

Follow the Guide below for detailed instructions on doing the above.

Some things to note:

  • AFAIK there is no way currently to adjust world generation of an already-exisitng world. It may be possible, but there is no documentation on doing it.
  • I personally was unhappy with how the build-in world generation worked even after modifying the json file and opted to use the Resource Spawner Overhaul mod instead. A guide of this will be included below as well.

Adjusting World Generation Settings (No Mods)

Navigate to the root folder of your Factorio installation.

First we need to delete any existing worlds from the serverfiles directory. (This is a great time to make backups if you have any progress you would like to save).

cd serverfiles/
rm -rf save1.zip # this will PERMANENTLY delete your world
rm -rf saves/* # this folder will only exist if you have ran the server

Now go to the data directory, copy the example files, then tweak them to your liking.

cd data/
cp map-gen-settings.example.json map-gen-settings.json
cp cp map-settings.example.json map-settings.json

Open the files with your favorite text editor. For map-gen-settings.json, the ore generation values can be:

"none" - equivalent to 0
"very-low", "very-small", "very-poor" - equivalent to 1/2
"low", "small", "poor" - equivalent to 1/sqrt(2)
"normal", "medium", "regular" - equivalent to 1
"high", "big", "good" - equivalent to sqrt(2)
"very-high", "very-big", "very-good" - equivalent to 2

Then it's time to use these files to generate your world. Enter back into the serverfiles directory and call the factorio binary:

cd ..
./bin/x64/factorio --create ./save1.zip --map-gen-settings data/map-gen-settings.json --map-settings data/map-settings.json

Adjusting World Generation Settings (Mods)

I prefer the added customization of the Resource Overhaul Mod to the built in generation.

The easiest way that I've found to generate a world with the RSO mod (and add mods in general) is as follows:

  1. Startup Factorio on a client and install the RSO mod
  2. Start generation of a new world and configure mod generation settings
  3. Grab the mod files and mod-settings.dat
  4. Transfer them to the server
  5. Delete or rename any previous worlds

To configure the generation, go to Play > New World > Mod Settings > Map, then adjust options accordingly. Doing so will generate a file called mod-settings.dat which stores these settings.

You can locate the mod files on your system in the path your Factorio installation saves to:

Windows (Zip file): <install directory>\mods
Windows (Installer): C:\Users\<username>\AppData\factorio\mods
Windows (Steam): C:\Users\<username>\AppData\Roaming\factorio\mods
OSX: ~/Library/"Application Support"/factorio/mods
Linux: ~/.factorio/mods

Transfer all of the mods and mod-settings.dat file to your server with a tool like Filezilla or the rsync command on Mac/Linux, or even a USB drive.

Note: DO NOT TRANSFER FILES OVER FTP

If you have SSH open on the server, you will want to use SFTP. If you're using Filezilla, setting the port to 22 will tell it to use SFTP. If you're using rsync, the command would look something like this:

rsync -a <source files> <user>@<ip>:<remote destination>

You will want to drop those files in the serverfiles/mods directory. You will also need to delete the existing save so that it generates a new one with the new generation rules. (This is a great time to make backups if you have any progress you would like to save).

Navigate to the root folder of your Factorio installation, then delete the save:

cd serverfiles/
rm -rf save1.zip # this will PERMANENTLY delete your world
rm -rf saves/* # this folder will only exist if you have ran the server

Once you've done that, you're good to start the server.

References

https://lua-api.factorio.com/latest/Concepts.html#MapGenSize

https://wiki.factorio.com/World_generator

https://wiki.factorio.com/Multiplayer#

https://wiki.factorio.com/Console#Command_line_parameters