S3Randomizer is a map generator for The Settlers III. It is a command line tool that generate *.map files from given input parameters. The tool is available for Windows and Linux operating systems.
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Example:
s3randomizer.exe --output="Random.map" --seed=12345 --size=640 --startGoods=HG

Documentation:
Usage:
  s3randomizer [--output=<output>] [--seed=<seed>] [--size=<size>] [--playerCount=<playerCount>] [--startGoods=<HG|MG|LG>]
  s3randomizer (-h | --help)
  s3randomizer --version
Options:
  -h --help                     Show this screen.
  --version                     Show version.
  --output=<output>             Path to the output *.map file that will be generated. [default: random.map]
  --seed=<seed>                 Seed (numeric) to use for random functions. Use another seed to get another map. [default: 123456789]
  --size=<size>                 Size of the generated map. [default: 320]
  --playerCount=<playerCount>   Amount of player start spots on the map. [default: 8]
  --startGoods=<HG|MG|LG>       Define the stacks and settlers the players start with. [default: HG]