Talk:Luopan

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This should be spelled LUOPAN. —Preceding unsigned comment added by 75.80.22.54 (talk) 22:41, 10 May 2008 (UTC)

History of the luopan moved from "Feng Shui"
Not professionally written, doesn't have suitably reliable sources. This type of material is unencyclopedic and not acceptable in Wikipedia articles. cb (talk) 04:01, 28 May 2008 (UTC)

The history of the Lo Pan compass takes us back to the Chou dynasty (770-476 BCE), when emperor Shing combined the knowledge of the compass with that of the I-ching.The foundation of the I-ching is in the trigrams. The trigrams are the set of three broken and/or solid lines that you typically find around a Chinese mirror. “These eight trigrams determine the divination of fortune” “These symbols and lines of the Trigrams numerical system were derived by sages as early as 2860 B.C. to give indications of their expressions in Fortune telling”

The history of feng shui began hundreds of years before the invention of the compass during the Chou Dynasty. The geomantic compass is call the lo-pan and holds all the mysteries of the earth.

The geomantic compass is used to determine the front and back orientations of a building and is made up of many concentric rings broken up into specific segments. The ring that is used when working the feng shui of your home or office is the one representing the 24 directions. The 360 degree compass is divided into 24 15 degree segments representing the 24 directions. Due north is then lined up so that it is in the center of the 15 degree tzu segment. "Any misalignment will give you erroneous readings." The line of sight on the compass will then point to one of the 24 segments that determine the facing direction of the building.

Feng shui compasses and geomagnetism
This information was moved from Feng Shui. This type of material is unencyclopedic and not acceptable in Wikipedia articles. cb (talk) 04:26, 28 May 2008 (UTC)

Fails Wikipedia's core content policies:
 * Verifiability
 * Questionable_sources
 * Verifiable Reliable Sources
 * Self-published sources (online and paper)
 * Reliable sources
 * Self-published sources

An overview of claims is offered below.

Claim: The stability of Magnetic North is critical for the accuracy of divining your fortune with a compass. In physics the convention is that the end of a dipole magnet where the magnetic field flows out is the "north" pole of the magnet, and the "south" pole of the magnet is where the field flows in. The geomagnetic field flows out of the geographic South Pole, and runs back into the geographic North Pole -- so geomagnetic north is actually at the geographic South Pole. The convention is to call the pole in Canada the North Magnetic Pole. "The Chinese always place south at the top of the compass but North is still magnetic North." Not certain why this quote is here and not in the paragraph "All Chinese compasses..." The fact that all geomagnetic poles wander has not prevented compasses from being useful. For example, compasses are installed in cars, ships, and oil rigs.

All Chinese compasses point to geographic south (thus the literal translations "pointing-south needle" and "pointing-south spoon"). A Luopan is used to determine the orientation of structures or the angle of something in relation to a structure.

Claim: Magnetic North and True North (the Earth’s axis) are not the same. A Luopan compensates for this. On a Luopan the Human Plate Central Needle was added during the Tang dynasty to measure declination and this has been updated as necessary. During the southern Song dynasty the Heaven Plate Seam Needle was added for magnetic deviation and also updated as necessary. The Earth Plate Correct Needle indicates current geomagnetic conditions.

As Joseph Needham remarked in a lecture, "When speaking of magnetism and of the magnetic compass … in China people were worrying about the nature of the declination (why the needle does not usually point exactly to the north) before Europeans had even heard about the polarity." Declination was discovered, says Needham, because "geomancers had been attending most carefully to the positions of their needles.”

'''Claim: The solar wind vibrates the magnetic pole, moving magnetic north. If you use magnetic north to determine where to put your furniture, the degrees are not critical, the overall direction is. However, if you use magnetic north to find a site location the reading will not be accurate.''' The convention is to call the pole in Canada the North Magnetic Pole.

The solar wind (a stream of hydrogen and helium nuclei) fluctuates during the Sun's rotation, with high-and low-speed streams creating high-pressure and low-pressure fronts that contribute to space weather, which sometimes hits the Earth's magnetic field to produce storms in the Earth's magnetosphere. Space weather fronts are like weather fronts on Earth. Space weather fronts generate interplanetary 'weather' such as aurora and magnetic storms, which can interrupt radio and satellite communications. Space weather has led to better early warning mechanisms, not to abandonment of affected technologies.

The Geological Survey of Canada Geomagnetism Where is the North Magnetic Pole?has now determined that the location of the North magnetic pole is now moving more than 40 km per year. The Geological Survey of Canada Geomagetism Daily Movement of the North Magnetic Polehas also determined that the North magnetic pole is in constant motion on any give day and may be displaced by as much as 80km or more. Geomagnetic storms are responsible for these constantly occurring fluctuations in the location of the North Magnetic Pole.

A magnetic compass is comprised of a magnetized needle balanced on a pivot point. Now matter where you are the magnetic need will point to the current location of the North Magnetic Pole.How Compasses Work  This answers the question asked by so many students, “Why do I get different compass readings from the same location?

'''The preceding two paragraphs do not logically follow the original claim. There is also a spam link (artofplacement.com) which means this material doesn't follow Wikipedia rules.'''

24 directions
The section that uses the 24 points of the Luopan to explain why each degree of the Luopan corresponds to about one day is ridiculous. A day corresponds roughly to a degree because there are 360 degrees in a circle and 365 days in a year. It has nothing to do with the 24 points. BitJam (talk) 05:46, 23 November 2010 (UTC)


 * Article text: §Form and Function


 * These are my impressions:
 * It explains that this compass has 24 directions (as opposed to 8 or 4).
 * Says it's equal to 15 degrees per direction, which is correct, (360÷24).
 * Editorializes slightly by saying it's "interesting" that the Sun takes approx. 15.2 days to traverse "a point" (meaning a direction). That's accurate enough (365.25÷24=15.21875) and it is interesting (or curious), because days rather than years are usually divided by 24 (in my neighborhood, 24 month solar calendars are common in East Asia). It's also interesting because clocks usually tell time while a compass usually deals with space.
 * Marking "a series of 24 points on the ecliptic" means dividing the year by 24; from the 24 month solar calendar article: "The points are spaced 15° apart along the ecliptic and are used by lunisolar calendars to stay synchronized with the seasons."
 * I fancy the angular degree corresponding to the day of the year figuratively points to the stars of the ecliptic, whereby one can find one's bearings between heaven and earth and time and space (to say nothing of the intricate symbolic interplay of the cycles created by the rings).
 * It's not in any way ridiculous—if anything, it's more spartan than it needs to be... I'm completely baffled as to what's so ridiculous about say 24×15 ...but 360×1... is what? real?—Machine Elf 1735 (talk) 17:03, 23 November 2010 (UTC)