Editing Greyhawk (section)

====Development of geography====
Rather than using his own version of the Great Kingdom map, which included local areas based on real-world maps, Gygax decided to create an entirely new and greatly expanded version of [[Oerth]].<ref name="Dragon #143"/> Needing many more original names for all of the geographical and political places on his map for the new and expanded areas, Gygax sometimes resorted to wordplay. He had previously used Perrenland on the Great Kingdom map, named after [[Jeff Perren]], who co-wrote the rules for ''Chainmail'' with Gygax, but for the new Greyhawk map he added many more such names of friends and acquaintances. For instance, Urnst was a homophone of Ernst (his son Ernie) and Sunndi was a near-homophone of Cindy, another of Gygax's children.<ref name="Revised Greyhawk Index"/>

Gygax gave only the most basic descriptions of each state; he expected that DMs would customize the setting in order to make it an integral part of their own individual campaigns.<ref name="Dragon #143" /> His map included arctic wastes, desert, temperate forests, tropical jungles, mountainous cordillera, seas and oceans, rivers, archipelagos and volcanoes.