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A patchwork quilt is a quilt in which the top layer may consist of pieces of fabric sewn together to form a design. [1] Originally, this was to make full use of leftover scraps of fabric, but now fabric is often bought specially for a specific design. Fabrics are now often sold in quarter meters (or quarter yards in the United States).
The square root appearing above can be eliminated for such applications as ordering locations by distance in a database query. On the other hand, some methods for computing nearest neighbors, such as the vantage-point tree, require that the distance metric obey the triangle inequality, in which case the square root must be retained.
In surveying, triangulation is the process of determining the location of a point by measuring only angles to it from known points at either end of a fixed baseline by using trigonometry, rather than measuring distances to the point directly as in trilateration. The point can then be fixed as the third point of a triangle with one known side ...
If the railway ran predominantly north and south, a 10-mile (16 km) township of one square mile sections was allotted on each side of the 400-foot (120 m) right-of-way. The land was granted in alternating sections (one square mile), with each odd numbered section going to the railroad company and each even numbered section kept by the government.
Vincenty's formulae are two related iterative methods used in geodesy to calculate the distance between two points on the surface of a spheroid, developed by Thaddeus Vincenty (1975a). They are based on the assumption that the figure of the Earth is an oblate spheroid, and hence are more accurate than methods that assume a spherical Earth, such ...
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In Chicago, a typical city block is 330 by 660 feet (100 m × 200 m), [2] meaning that 16 east-west blocks or 8 north-south blocks measure one mile, which has been adopted by other US cities. In much of the United States and Canada, the addresses follow a block and lot number system, in which each block of a street is allotted 100 building numbers.
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