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World Generators
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Generates .GIF and .JPG images of planets.
site exerpt
Terranova: Planet of the Day Over the next million years our descendents will spread among the stars in an exponential explosion of life, remaking the galaxy as surely as life has remolded Earth in its own image. Let's be conservative, and assume that only one...Creates fractal world maps in .GIF format.
http://www.lysator.liu.se/~johol/fwmg/fwmg.html
An outstanding fractal-generating world mapping tool. Current development copy is freeware, and available for download. Instructions for interfacing with Campaign Cartographer 2 are included on the site.
http://www.ridgenet.net/~jslayton/software.html
Commercial program to draw various maps for fantasy roleplaying games. Includes an add-on that allows simulation of climate and erosion effects.
http://www.nbos.com/products/mapper/mapper.htm
A Windows program to generate a planet's geographic features from fractal algorithms.
http://raieh.homelinux.net/cgi-bin/raieh.pl?FractalWorld
Online calculations facilitate the creation of astronomically credible planets. Examples from our solar system and science fiction provide a starting point; tinker with the numbers or build a new world from scratch.
http://www.planetdesigner.org.uk/