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Surveying. A surveyor using a total station. A student using a theodolite in field. Surveying or land surveying is the technique, profession, art, and science of determining the terrestrial two-dimensional or three-dimensional positions of points and the distances and angles between them. These points are usually on the surface of the Earth ...
Angular distance. Angular distance or angular separation is the measure of the angle between the orientation of two straight lines, rays, or vectors in three-dimensional space, or the central angle subtended by the radii through two points on a sphere. When the rays are lines of sight from an observer to two points in space, it is known as the ...
In the Euclidean TSP (see below), the distance between two cities is the Euclidean distance between the corresponding points. In the rectilinear TSP, the distance between two cities is the sum of the absolute values of the differences of their x- and y-coordinates. This metric is often called the Manhattan distance or city-block metric.
Proximity analysis. Proximity analysis is a class of spatial analysis tools and algorithms that employ geographic distance as a central principle. [1] Distance is fundamental to geographic inquiry and spatial analysis, due to principles such as the friction of distance, Tobler's first law of geography, and Spatial autocorrelation, which are ...
A common statistical definition between the Nordic countries was agreed in 1960, which defines an urban area as a contiguous built-up area with a population of at least 200 and where the maximum distance between dwellings is 200 metres, excluding roads, car parks, parks, sports grounds and cemeteries - regardless of the boundaries of the ...
Cartographic generalization, or map generalization, includes all changes in a map that are made when one derives a smaller-scale map from a larger-scale map or map data. It is a core part of cartographic design. Whether done manually by a cartographer or by a computer or set of algorithms, generalization seeks to abstract spatial information at ...
The M-2 Motorway or the Lahore–Islamabad Motorway ( Urdu: لاہور-اسلام آباد موٹروے) is a north–south motorway in Pakistan, connecting Rawalpindi / Islamabad to Lahore, and is the first motorway to have been built in South Asia. [1] The M-2 is 375 km long and located entirely in Punjab. It continues on to eventually become ...
Nearest neighbor search. Nearest neighbor search ( NNS ), as a form of proximity search, is the optimization problem of finding the point in a given set that is closest (or most similar) to a given point. Closeness is typically expressed in terms of a dissimilarity function: the less similar the objects, the larger the function values.
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