The data map used to generate it was:
[
['canyon', 'desert', 'salt_flats'],
['salt_flats', 'hoodoos', 'salt_flats'],
['salt_flats', 'dunes', 'dunes'],
]You can copy that data and paste it into the custom map generator.
To generate a different size, enter values between 1 and 9 (width x height):