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  2. Military Grid Reference System - Wikipedia

    en.wikipedia.org/wiki/Military_Grid_Reference_System

    The intersection of a UTM zone and a latitude band is (normally) a 6° × 8° polygon called a grid zone, whose designation in MGRS is formed by the zone number (one or two digits – the number for zones 1 to 9 is just a single digit, according to the example in DMA TM 8358.1, Section 3-2, [1] Figure 7), followed by the latitude band letter ...

  3. QDGC - Wikipedia

    en.wikipedia.org/wiki/QDGC

    To get smaller squares the above squares are again divided in four - giving us a total of 16 squares within a degree square. The names for the new level of squares are named the same way. The full reference of a square could then be: S01E010AD; The number of squares for each QDGC level can be calculated with this formula: number of squares = (2 ...

  4. Projected coordinate system - Wikipedia

    en.wikipedia.org/wiki/Projected_coordinate_system

    The area is divided into 100 km squares, each of which is denoted by a two-letter code. Within each 100 km square, a numerical grid reference is used. Since the Eastings and Northings are one kilometre apart, a combination of a Northing and an Easting will give a four-digit grid reference describing a one-kilometre square on the ground. The ...

  5. World Meteorological Organization squares - Wikipedia

    en.wikipedia.org/wiki/World_Meteorological...

    The second digit (x0xx through x8xx) indicates the number of tens of degrees latitude (north in global quadrants 1 and 7, south in global quadrants 3 and 5) of the 'minimum' square boundary (nearest to the Equator), i.e. a cell extending between 10°N and 20°N (or 10°S and 20°S) has this digit = 1, a cell extending between 20°N and 30°N ...

  6. Geohash - Wikipedia

    en.wikipedia.org/wiki/Geohash

    The curve of the grid of 32 cells was obtained merging 2 by 2 cells of the "next level" (64 cells grid illustrated here) to obtain a geometrical representation of the "odd-digit Geohash". It is possible to build the "И-order curve" from the Z-order curve by merging neighboring cells and indexing the resulting rectangular grid by the function j ...

  7. Discrete global grid - Wikipedia

    en.wikipedia.org/wiki/Discrete_global_grid

    World Grid Squares: Are a compatible extension of Japanese Grid Squares standardized in Japan Industrial Standards (JIS X0410) to worldwide. The World Grid Square code can identify grid squares covering the world based on nine layers. We can express a grid square by using from 6 to 16 digit sequence with accordance to its resolution. [8 ...

  8. C-squares - Wikipedia

    en.wikipedia.org/wiki/C-squares

    C-squares (acronym for the Concise Spatial QUery And REpresentation System) is a system of spatially unique, location-based identifiers for areas on the surface of the earth, represented as cells from a latitude- and longitude-based Discrete Global Grid at a hierarchical set of resolution steps, obtained by progressively subdividing 10×10 degree World Meteorological Organization squares; the ...

  9. Inshi no heya - Wikipedia

    en.wikipedia.org/wiki/Inshi_no_heya

    The goal is to fill all the cells with nonzero single-digit numbers (1 through n, where n is the length of the grid's edge) such that: Solved Inshi No Heya grid The numbers in each room, when multiplied together, equal the small number in the upper left corner of the room; No number appears twice in a column or row