This work is dedicated to the public domain.

Creative Commons Public Domain
http://creativecommons.org/licenses/publicdomain →pageinfo

v070623 13:08
http://www.horaguchi.net/map_generator/map_generator.html →pageinfo

以下のページを参考にさせてもらいました。

Random Dungeon Design: The Secret Workings of Jamis Buck's Dungeon Generator
http://www.aarg.net/~minam/dungeon_design.html →pageinfo