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Mapcraft - Fantasy map designer

WorldGen - SciFi universe generator

Mapcraft Web - Web based fantasy map designer

All code for the project is released under the GPL, and is copyright Samuel Penn.

The text on this wiki is dual licensed CC-BY-SA and GPL.

You can contact the author at


Planet Type

The planet type is it's classification as per the Planetary Classification List.

Planet types are also sorted according to whether they are:

  • Planetoid belt - collection of planetoids
  • Asteroid - individual asteroids smaller than a dwarf planet
  • Dwarf Planet - small worlds that don't deserve the title planet
  • Terrestrial Planet - includes both rock and ice worlds
  • Jovian - Gas giants of varying sizes

Determining Planet Type from UWP

How we determine the planet type from the UWP when generating known worlds.

There are four main points:

  • Radius
  • Atmosphere
  • Temperature
  • Hydrographics

Everything else can be pretty much ignored.


Tiny (<3000km)

Small (<5000km)

Medium (<8000km)

Large (8000km+)

if (water world): Panthalassic if (hot): JaniLithic else: Gaian

worldgen/planets/type.txt · Last modified: 2015/02/04 22:39 (external edit)