The four cardinal directions, or cardinal points, are the four main compass directions: north, south, east, and west, commonly denoted by their initials N, S, E, and W respectively. Relative to north, the directions east, south, and west are at 90 degree intervals in the clockwise direction.
The ordinal directions (also called the intercardinal directions) are northeast (NE), southeast (SE), southwest (SW), and northwest (NW). The intermediate direction of every set of intercardinal and cardinal direction is called a secondary intercardinal direction. These eight shortest points in the compass rose shown to the right are:
Points between the cardinal directions form the points of the compass. Arbitrary horizontal directions may be indicated by their azimuth angle value.
The directional names are routinely associated with azimuths, the angle of rotation (in degrees) in the unit circle over the horizontal plane. It is a necessary step for navigational calculations (derived from trigonometry) and for use with Global Positioning System (GPS) receivers. The four cardinal directions correspond to the following degrees of a compass:
The intercardinal (intermediate, or, historically, ordinal [2] ) directions are the four intermediate compass directions located halfway between each pair of cardinal directions.
These eight directional names have been further compounded known as tertiary intercardinal directions, resulting in a total of 32 named points evenly spaced around the compass: north (N), north by east (NbE), north-northeast (NNE), northeast by north (NEbN), northeast (NE), northeast by east (NEbE), east-northeast (ENE), east by north (EbN), east (E), etc.
Cardinal directions or cardinal points may sometimes be extended to include vertical position (elevation, altitude, depth): north and south, east and west, up and down; or mathematically the six directions of the x-, y-, and z-axes in three-dimensional Cartesian coordinates. Topographic maps include elevation, typically via contour lines. Alternatively, elevation angle may be combined with cardinal direction (or, more generally, arbitrary azimuth angle) to form a local spherical coordinate system.
In astronomy, the cardinal points of an astronomical body as seen in the sky are four points defined by the directions toward which the celestial poles lie relative to the center of the disk of the object in the sky. [3] [4] A line (a great circle on the celestial sphere) from the center of the disk to the North celestial pole will intersect the edge of the body (the "limb") at the North point. The North point will then be the point on the limb that is closest to the North celestial pole. Similarly, a line from the center to the South celestial pole will define the South point by its intersection with the limb. The points at right angles to the North and South points are the East and West points. Going around the disk clockwise from the North point, one encounters in order the West point, the South point, and then the East point. This is opposite to the order on a terrestrial map because one is looking up instead of down.
Similarly, when describing the location of one astronomical object relative to another, "north" means closer to the North celestial pole, "east" means at a higher right ascension, "south" means closer to the South celestial pole, and "west" means at a lower right ascension. If one is looking at two stars that are below the North Star, for example, the one that is "east" will actually be further to the left.
During the Migration Period, the Germanic names for the cardinal directions entered the Romance languages, where they replaced the Latin names borealis (or septentrionalis) with north, australis (or meridionalis) with south, occidentalis with west and orientalis with east. It is possible that some northern people used the Germanic names for the intermediate directions. Medieval Scandinavian orientation would thus have involved a 45 degree rotation of cardinal directions. [5]
In many regions of the world, prevalent winds change direction seasonally, and consequently many cultures associate specific named winds with cardinal and intercardinal directions. For example, classical Greek culture characterized these winds as Anemoi.
In pre-modern Europe more generally, between eight and 32 points of the compass – cardinal and intercardinal directions – were given names. These often corresponded to the directional winds of the Mediterranean Sea (for example, southeast was linked to the Sirocco , a wind from the Sahara).
Particular colors are associated in some traditions with the cardinal points. These are typically "natural colors" of human perception rather than optical primary colors.[ vague ]
Many cultures, especially in Asia, include the center as a fifth cardinal point.
Northern Eurasia | N | E | S | W | C | Source |
---|---|---|---|---|---|---|
Slavic | — | [11] | ||||
China | [12] [13] [14] | |||||
Ainu | [15] [16] | |||||
Turkic | [15] | |||||
Kalmyks | — | [17] | ||||
Tibet | [15] |
Central Asian, Eastern European and North East Asian cultures frequently have traditions associating colors with four or five cardinal points.
Systems with five cardinal points (four directions and the center) include those from pre-modern China, as well as traditional Turkic, Tibetan and Ainu cultures. In Chinese tradition, the five cardinal point system is related to I Ching, the Wu Xing and the five naked-eye planets. In traditional Chinese astrology, the zodiacal belt is divided into the four constellation groups corresponding to the directions.
Each direction is often identified with a color, and (at least in China) with a mythological creature of that color. Geographical or ethnic terms may contain the name of the color instead of the name of the corresponding direction. [12] [13]
East: Green (青 "qīng" corresponds to both green and blue); Spring; Wood
Countries where Arabic is used refer to the cardinal directions as Ash Shamal (N), Al Gharb (W), Ash Sharq (E) and Al Janoob (S). Additionally, Al Wusta is used for the center. All five are used for geographic subdivision names ( wilayahs , states, regions, governorates, provinces, districts or even towns), and some are the origin of some Southern Iberian place names (such as Algarve, Portugal and Axarquía, Spain).
North America | E | N | W | S | C | Source |
---|---|---|---|---|---|---|
Anishinaabe | — | [18] | ||||
Apache | — | [19] | ||||
Aztecs | — | [20] | ||||
Báxoje | — | [21] | ||||
Cherokee | [22] | |||||
Cheyenne | — | [23] | ||||
Lakota | — | [24] | ||||
Maya | [25] | |||||
Navajo | — | [26] | ||||
Puebloans | — | [27] | ||||
Purépecha |
In Mesoamerica and North America, a number of traditional indigenous cosmologies include four cardinal directions and a center. Some may also include "above" and "below" as directions, and therefore focus on a cosmology of seven directions. For example, among the Hopi of the Southwestern United States, the four named cardinal directions are not North, South, East and West but are the four directions associated with the places of sunrise and sunset at the winter and summer solstices. [28] [29] [30] [31] Each direction may be associated with a color, which can vary widely between nations, but which is usually one of the basic colors found in nature and natural pigments, such as black, red, white, and yellow, with occasional appearances of blue, green, or other hues. [32] There can be great variety in color symbolism, even among cultures that are close neighbors geographically.
Ten Hindu deities, known as the "Dikpālas", have been recognized in classical Indian scriptures, symbolizing the four cardinal and four intercardinal directions with the additional directions of up and down. Each of the ten directions has its own name in Sanskrit. [33]
Some indigenous Australians have cardinal directions deeply embedded in their culture. For example, the Warlpiri people have a cultural philosophy deeply connected to the four cardinal directions [34] and the Guugu Yimithirr people use cardinal directions rather than relative direction even when indicating the position of an object close to their body. (For more information, see: Cultures without relative directions.)
The precise direction of the cardinal points appears to be important in Aboriginal stone arrangements.
Many aboriginal languages contain words for the usual four cardinal directions, but some contain words for 5 or even 6 cardinal directions. [35]
In some languages, such as Estonian, Finnish and Breton, the intercardinal directions have names that are not compounds of the names of the cardinal directions (as, for instance, northeast is compounded from north and east). In Estonian, those are kirre (northeast), kagu (southeast), edel (southwest), and loe (northwest), in Finnish koillinen (northeast), kaakko (southeast), lounas (southwest), and luode (northwest). In Japanese, there is the interesting situation that native Japanese words (yamato kotoba, kun readings of kanji) are used for the cardinal directions (such as minami for 南, south), but borrowed Chinese words (on readings of kanji) are used for intercardinal directions (such as tō-nan for 東南, southeast, lit. "east-south").[ dubious – discuss ] In the Malay language, adding laut (sea) to either east (timur) or west (barat) results in northeast or northwest, respectively, whereas adding daya to west (giving barat daya) results in southwest. Southeast has a special word: tenggara.
Sanskrit and other Indian languages that borrow from it use the names of the gods associated with each direction: east (Indra), southeast (Agni), south (Yama/Dharma), southwest (Nirrti), west (Varuna), northwest (Vayu), north (Kubera/Heaven) and northeast (Ishana/Shiva). North is associated with the Himalayas and heaven while the south is associated with the underworld or land of the fathers (Pitr loka). The directions are named by adding "disha" to the names of each god or entity: e.g. Indradisha (direction of Indra) or Pitrdisha (direction of the forefathers i.e. south).
The cardinal directions of the Hopi language and the Tewa dialect spoken by the Hopi-Tewa are related to the places of sunrise and sunset at the solstices, and correspond approximately to the European intercardinal directions. [28] [29] [36]
Use of the compass directions is common and deeply embedded in European and Chinese culture (see south-pointing chariot). Some other cultures make greater use of other referents, such as toward the sea or toward the mountains (Hawaii, Bali), or upstream and downstream (most notably in ancient Egypt, also in the Yurok and Karuk languages). Lengo (Guadalcanal, Solomon Islands) has four non-compass directions: landward, seaward, upcoast, and downcoast.[ citation needed ]
Some languages lack words for body-relative directions such as left/right, and use geographical directions instead. [37]
An azimuth is the horizontal angle from a cardinal direction, most commonly north, in a local or observer-centric spherical coordinate system.
North is one of the four compass points or cardinal directions. It is the opposite of south and is perpendicular to east and west. North is a noun, adjective, or adverb indicating direction or geography.
The Guardians of the Directions are the deities who rule the specific directions of space according to Hinduism, Jainism and Vajrayāna Buddhism—especially Kālacakra. As a group of eight deities, they are called Aṣṭa-Dikpāla (अष्ट-दिक्पाल), literally meaning guardians of eight directions. They are often augmented with two extra deities for the ten directions, when they are known as the Daśa-Dikpāla. In Hinduism it is traditional to represent their images on the walls and ceilings of Hindu temples. They are also often portrayed in Jain temples, with the exception that Nāga usually takes the place of Vishnu in the nadir. Ancient Java and Bali Hinduism recognize Nava-Dikpāla, literally meaning guardians of nine directions, that consist of eight directions with one addition in the center. The nine guardian gods of directions is called Dewata Nawa Sanga. The diagram of these guardian gods of directions is featured in Surya Majapahit, the emblem of Majapahit empire.
In navigation, bearing or azimuth is the horizontal angle between the direction of an object and north or another object. The angle value can be specified in various angular units, such as degrees, mils, or grad. More specifically:
A compass rose or compass star, sometimes called a wind rose or rose of the winds, is a polar diagram displaying the orientation of the cardinal directions and their intermediate points. It is used on compasses, maps, or monuments. It is particularly common in navigation systems, including nautical charts, non-directional beacons (NDB), VHF omnidirectional range (VOR) systems, satellite navigation devices ("GPS").
The points of the compass are a set of horizontal, radially arrayed compass directions used in navigation and cartography. A compass rose is primarily composed of four cardinal directions—north, east, south, and west—each separated by 90 degrees, and secondarily divided by four ordinal (intercardinal) directions—northeast, southeast, southwest, and northwest—each located halfway between two cardinal directions. Some disciplines such as meteorology and navigation further divide the compass with additional azimuths. Within European tradition, a fully defined compass has 32 "points".
A cardinal mark is a sea mark commonly used in maritime pilotage to indicate the position of a hazard and the direction of safe water.
In U.S. land surveying under the Public Land Survey System (PLSS), a section is an area nominally one square mile, containing 640 acres, with 36 sections making up one survey township on a rectangular grid.
A day beacon is an unlighted nautical sea mark. A signboard identifying it is called a day mark. Day beacons typically mark channels whose key points are marked by lighted buoys. They may also mark smaller navigable routes in their entirety. They are the most common navigation aid in shallow water, as they are relatively inexpensive to install and maintain. Navigation around them is similar to that around other navigation aids.
True north is the direction along Earth's surface towards the place where the imaginary rotational axis of the Earth intersects the surface of the Earth. That place is called the True North Pole. True south is the direction opposite to the true north. North per se is one of the cardinal directions, a system of naming orientations on the Earth. There are multiple ways of determining the North in different contexts.
The oldest part of Denver, Colorado, now the neighborhoods of Auraria Campus, LoDo, much of downtown, and Five Points, is laid out on a grid plan that is oriented diagonal to the four cardinal directions. The rest of the city, including the eastern part of downtown, is laid out primarily on a grid oriented to the cardinal directions. In this larger grid, from east to west, there are generally 16 city blocks per mile, except between Zuni Street and Lowell Boulevard in west Denver. From north to south, there are typically eight blocks per mile, although there are many areas with more blocks per mile. Addresses follow a decimal system, with addresses advancing by one hundred at each cross street.
The Soonwald is a forested, low mountain region, up to 657.5 m above sea level (NN), which forms part of the Hunsrück mountains in the German Central Uplands. It lies within the counties of Rhein-Hunsrück-Kreis and Bad Kreuznach in the state of Rhineland-Palatinate.
Astrolabe Island is an island 3 nautical miles long, lying in the Bransfield Strait 14 nautical miles northwest of Cape Ducorps, Trinity Peninsula in Antarctica.
The Southwest Branch Saint John River is a 62.0-mile-long (99.8 km) river in Maine and Quebec. The branch originates in "Little Saint John Lake" on the international boundary between Saint-Zacharie, Quebec and Seboomook Lake Township 5, Range 20, WELS. The branch forms the Canada–United States border as it flows northeasterly to a confluence with the Little Southwest Branch Saint John River in Seboomook Lake Township 9, Range 18, WELS. The Southwest Branch flows briefly into Quebec and then through Maine to its confluence with the Baker Branch Saint John River in Seboomook Lake Township 9, Range 17, WELS. The Southwest Branch finally joins with the Northwest Branch to form the Saint John River.
Surya Majapahit is the emblem commonly found in ruins dated from the Majapahit era. The emblem commonly took the form of an eight-pointed sun ray with the rounded part in the center depicting Hindu deities. The emblem might have taken the form of a cosmological diagram haloed by typical sun rays, or a simple circle with typical sun rays. Because of the popularity of the Surya emblem during the Majapahit era, it has been suggested that may have served as the imperial symbol of the Majapahit empire.
Primordial qigong is a form of qigong purportedly developed by the Taoist sage Zhang Sanfeng. Also known as Wuji gong, it is said to have been developed by Zhang before he invented tai chi.
In the ancient Mediterranean world, the classical compass winds were names for the points of geographic direction and orientation, in association with the winds as conceived of by the ancient Greeks and Romans. Ancient wind roses typically had twelve winds and thus twelve points of orientation, sometimes reduced to eight or increased to twenty-four.
There are four seas in the world that are named in English after common color names, although most look blue. The names are: The Red Sea, White Sea, Black Sea, and Yellow Sea. Their names are given by the color of the water. Sometimes a system of color symbolism was used as the following method green or light blue for east, black or dark for north, white for west, and red for south. This method is called cardinal directions. There are other theories but these two methods of colors are also used.
Fountain of Cardinal Points is one of the representative fountains of Timișoara, being located near Ion I.C. Brătianu Square, at the intersection of Oituz Street and Take Ionescu Boulevard.
Direction determination refers to the ways in which a cardinal direction or compass point can be determined in navigation and wayfinding. The most direct method is using a compass, but indirect methods exist, based on the Sun path, the stars, and satellite navigation.
rigge1918
In Ainu [...] siwnin means both 'yellow' and 'blue' and hu means 'green' and 'red'.
The cardinal directions … are "solstitial" in that places on the horizon of sunrise and sunset on the solstices correlate with these directions: On the summer solstice the sun rises in the northeast, hoop, and sets in the northwest, kwiningya; on the winter solstice the sun rises in the southeast, tatkya, and sets in the southwest, taavang.
Hopi orientation corresponds only approximately with ours, their cardinal points being marked by the solstitial rising and setting points of the sun.... Their cardinal points therefore are not mutually equidistant on the horizon and agree roughly with our semi-cardinal points.
The names of the four horizon cardinal points are, kwiniwi, northwest; tevyü'ña, southwest; tatyúka, southeast, and hopokyüka (syncopated hópoko), northeast.
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