The project’s goal is the procedural generation of really huge spherical planets with following features:

• full-fledged river systems, highland lakes, and custom outlines of the continents;
• biomes with a placement dependent on longitude;
• the gradual transition of biomes is achieved by the mutual penetration of their parts (yin-yang boundary);
• various vector data defining the relief features (continents and lakes boundaries, riverbeds, biomes boundaries, height contours, tiles and sectors, etc);
• full size planets with correct spherical geometry of the relief features;
• the procedural generated planets are data instantly suited for existing Geographic Information System (GIS) software;

Examples of planets

Serpento. Enjoy the planetary biomes. Serpento planet page with data The big planet model with ocean sectors

On planet Mandelbrot the ancient alien civilization left a message in the form of the continents. Mandelbrot planet page with data The big planet model

For more info see my blog.

List of all sample planets can be found here.