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  2. Map folding - Wikipedia

    en.wikipedia.org/wiki/Map_folding

    Map folding is the question of how many ways there are to fold a rectangular map along its creases, allowing each crease to form either a mountain or a valley fold. It differs from stamp folding in that it includes both vertical and horizontal creases, rather than only creases in a single direction.

  3. National Defence Academy and Naval Academy Examination

    en.wikipedia.org/wiki/National_Defence_Academy...

    The written examination consists of two papers: Mathematics and General Ability Test (GAT). Both papers are objective type and are conducted on the same day. The Mathematics paper evaluates the candidates' mathematical aptitude, while the GAT paper assesses their English language proficiency, general knowledge, and reasoning abilities.

  4. Map (mathematics) - Wikipedia

    en.wikipedia.org/wiki/Map_(mathematics)

    A map is a function, as in the association of any of the four colored shapes in X to its color in Y. In mathematics, a map or mapping is a function in its general sense. [1] These terms may have originated as from the process of making a geographical map: mapping the Earth surface to a sheet of paper. [2]

  5. Homomorphism - Wikipedia

    en.wikipedia.org/wiki/Homomorphism

    In algebra, a homomorphism is a structure-preserving map between two algebraic structures of the same type (such as two groups, two rings, or two vector spaces).The word homomorphism comes from the Ancient Greek language: ὁμός (homos) meaning "same" and μορφή (morphe) meaning "form" or "shape".

  6. Choropleth map - Wikipedia

    en.wikipedia.org/wiki/Choropleth_map

    The earliest known choropleth map was created in 1826 by Baron Pierre Charles Dupin, depicting the availability of basic education in France by department. [4] More "cartes teintées" ("tinted maps") were soon produced in France to visualize other "moral statistics" on education, disease, crime, and living conditions.

  7. Map graph - Wikipedia

    en.wikipedia.org/wiki/Map_graph

    A 3-map graph is a planar graph, and every planar graph can be represented as a 3-map graph. Every 4-map graph is a 1-planar graph, a graph that can be drawn with at most one crossing per edge, and every optimal 1-planar graph (a graph formed from a planar quadrangulation by adding two crossing diagonals to every quadrilateral face) is a 4-map ...

  8. Map algebra - Wikipedia

    en.wikipedia.org/wiki/Map_algebra

    Map algebra is an algebra for manipulating geographic data, primarily fields.Developed by Dr. Dana Tomlin and others in the late 1970s, it is a set of primitive operations in a geographic information system (GIS) which allows one or more raster layers ("maps") of similar dimensions to produce a new raster layer (map) using mathematical or other operations such as addition, subtraction etc.

  9. Bhuvan - Wikipedia

    en.wikipedia.org/wiki/Bhuvan

    Bhuvan (lit: Earth) is an Indian web-based utility which allows users to explore a set of geographic content prepared by the Indian Space Research Organisation.The content which the utility serves is mostly restricted to within Indian boundaries and is offered in four regional languages.