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  2. 2020 Indonesian census - Wikipedia

    en.wikipedia.org/wiki/2020_Indonesian_census

    The Statistics Indonesia in 2018 has released the official projection of Indonesia's population 2015–2045, [3] which are based on previous census in 2010 and the 2015 Indonesian population survey between censuses (SUPAS).

  3. Behrmann projection - Wikipedia

    en.wikipedia.org/wiki/Behrmann_projection

    Behrmann projection of the world The Behrmann cylindrical equal-area projection with Tissot's indicatrices of deformation. The Behrmann projection is a cylindrical equal-area map projection described by Walter Behrmann in 1910. [1]

  4. Arithmetic - Wikipedia

    en.wikipedia.org/wiki/Arithmetic

    Arithmetic is the fundamental branch of mathematics that studies numbers and their operations. In particular, it deals with numerical calculations using the arithmetic operations of addition, subtraction, multiplication, and division. [1]

  5. 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.