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Luopan is a Chinese magnetic compass, also known as a Feng Shui compass. It is used by a Feng Shui consultant to determine the precise direction of a structure or other item. Since the invention of the compass for use in Feng Shui,〔Wallace H. Campbell. ''Earth Magnetism: A Guided Tour Through Magnetic Fields.'' Academic Press, 2001.〕 traditional feng shui has required its use. ==Form and Function== Like a conventional compass, a luopan is a direction finder. However, a luopan differs from a compass in several important ways. The most obvious difference is the Feng Shui formulas embedded in up to 40 concentric rings on the surface. This is a metal or wooden plate known as the ''heaven dial''. The circular metal or wooden plate typically sits on a wooden base known as the ''earth plate''. The heaven dial rotates freely on the earth plate. A red wire or thread that crosses the earth plate and heaven dial at 90-degree angles is the ''Heaven Center Cross Line'', or ''Red Cross Grid Line''.〔Cheng Jian Jun and Adriana Fernandes-Gonçalves. ''Chinese Feng Shui Compass: Step by Step Guide.'' 1998:25〕 This line is used to find the direction and note position on the rings. A conventional compass has markings for four or eight directions, while a luopan typically contains markings for 24 directions. This translates to 15 degrees per direction. The Sun takes approximately 15.2 days to traverse a solar term, a series of 24 points on the ecliptic. Since there are 360 degrees on the luopan and approximately 365.25 days in a mean solar year, each degree on a luopan approximates a terrestrial day. Unlike a typical compass, a luopan does not point to the north magnetic pole of Earth. The needle of a luopan points to the south magnetic pole (it does not point to the geographic south pole). The Chinese word for ''compass'' translates to “pointing-south needle.” 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「Luopan」の詳細全文を読む スポンサード リンク
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