To determine the plane or in space, the location of a point or a group of the order of a few. For example, to determine the location of ships in the ocean, on two numbers with the longitude and latitude, these two numbers together constitute the coordinates of the location of the ship.
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coordinate
Used to determine the line on that space that a given plane or surface point position with the order of a group of numbers
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No. 3
Cartesian coordinates
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No. 4
Coordinate zuòbiāo Plane concept is used to indicate the absolute position of a point Extends to the game Games used to represent things in the flat position Geographical coordinates defined coordinates Determining the positional relationship between the data value _set_ To determine the location of a point on the celestial sphere, built on the celestial sphere spherical coordinate system. There are two basic elements: ① basic plane. _Select_ed by a great circle on the celestial sphere of a determined. Great circle called the base circle, two base circles as one of the very geometry of spherical polar coordinates. ② main point, also known as the origin. The intersection of the celestial coordinates of a _select_ed pole of a great circle through the base ring and the determined generated. Point on the celestial sphere celestial coordinate system in this position by two spherical coordinates calibration: ① first coordinate or called by the coordinates. Made this point and coordinates pole great circle, called the vice ring, from the primary to the secondary coil and the base point circle arc to the intersection of the warp coordinates. ② said second latitudinal coordinates or coordinates. From the sub-loop from the base circle to the point of large latitudinal coordinates of the arc length. The position of any point can be uniquely determined by the two celestial coordinates. Such a spherical coordinate system is an orthogonal coordinate system. For different base circle and the main point, as well as to coordinate the different measurements used by, can lead to different celestial coordinate system, commonly used horizontal coordinate system equatorial coordinate system ecliptic coordinate system and the galactic coordinates Plane coordinate system is divided into three categories: 1, the absolute coordinates: 0 is the origin as the reference point to locate the exact location of a point in the plane, expressed in terms of: A (X, Y); 2, the relative coordinates: a point on the reference point is the point to locate the exact location of a point in the plane, which represents the method: A (@ △ X, △ Y); 3, the relative polar coordinates: a point in the plane is pointed out with respect to the point of displacement distance, direction and angle, the specific representation of: A (@ d <α).
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Encyclopedia
Coordinate coordinates: The APOnonlus been called by now coordinates (the term is G.Leibniz given in 1694's) definition of a quadratic curve, although Apellonius coordinates of no value. To the second century AD, Rolemy in his "Geography", "[Qin ography) has begun to value Latitude and longitude coordinates for .14 century, N.Oresme the coordinates for Plane to construct graphical and said now use the term longitude and latitude The so-called horizontal and vertical coordinates. Avoid "nothing" to the introduction of coordinates, in order to maintain the theory of "pure sad Nature ", such attempts have not proved the correctness of its own (for example, by Ch. projective coordinates von Staudt (1847) proposed (projective hundred roii- nates) integrated construction method, which can be proved by a simple algebraic equivalents for Generations, which leads to the concept of the division ring projective geometry), however, the Thinking continues to be called the introduction of the internal coordinate method (to distinguish In the "nothing" imposed coordinate foreign methods), which is calculated based on the target The location combined with a ride on some sub-standard _set_ of pre-_select_ed Standard, such as a sub_set_ of curves, surfaces, etc. (called coordinates corresponding curve Like) bite dinate curves), the coordinates of the surface (~ dinates,, r- fa Island), etc.). This is particularly applicable to its definition involves the number of _set_s containing (eg Metric space and vector space), and therefore suitable for a wide range of practical The importance of mathematical objects; This explains why this method is so Pop. Linear coordinate the relevant point of the coordinate system (point coordinates (POint gamma r by the - nates)) has a special place. for this coordinate, the coordinate Qu Are straight lines, for example. , Leaving the country n Cartesian coordinates (Ca ratio Zhao Assistant () commanded K) - g Chuan al ~ rdinate systeln), twelve angular coordinates (see tetrahedron Coordinate (tetrahedral Shan rdinates)), the center of gravity coordinates (bary Union: n- trie Shan rdinates) and projective coordinates' projective coordlnat [5). Coordinates of the curve is not all that is curvilinear coordinates coordinates of the line. Curve sit Standard for the plane L (such as polar coordinates (pol stare coffee rdinates); oval sitting Standard (elliPtie coordinates); parabolic coordinates (Par:, belic Shan rdinates); bipolar coordinates (bipolar intended) rdinates)) and surface _l: (geodetic coordinates (Romans remember esie coord, nates); isothermal coordinates (1, o- the dish al coordinates), etc.). meet people use of NETGEAR curves, the introduction of a number of special types of curvilinear coordinates, This coordinate system is the most important class of the orthogonal system (orthogonal sys- tem), which coordinate curves intersect at right angles. Plane (or surface) of various types of coordinates, can be pushed into a plant (three Dimensional) space, for example, can be produced from a space plane polar coordinates polar coordinates Concept (spherical coordinates (s pheri to l Shan rdinates) or cylindrical coordinates (Emily - Un mountain r gamma rdinates)); bipolar coordinate plane ride from the loop can be exported Standard (toroldal coordinates), double cylindrical coordinates (bi Qing] l. Surface Secretary "Magic rdinates) and the concept of spatial bipolar coordinates; ride from flat oval Standard ellipsoid can produce spatial coordinates (elli sound oidal Shan rdlnates) of Concept. To consider the simplicity and clarity, sometimes we do not use those familiar Coordinate form type wherein the amount of the composition of a _set_ of coordinates of the midpoint of The number is equal to the dimension of the _set_. Kind of consideration among at individual points , The mapping may not be every one of the coordinates (e.g., polar coordinate is this
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English Expression
n.: coordinate, reference, either of two numbers or letters used to fix the position of a point on a graph or map, co-ordinate, X-Y coordinate (mathematics), (in math.) coordinates