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  2. Geocode - Wikipedia

    en.wikipedia.org/wiki/Geocode

    See geocode system types below (of names and of grids). Hierarchy: geocode's syntax hierarchy corresponding to the spatial hierarchy of its represented entities. A geocode system can hierarchical (name or grid) or non-hierarchical. Covering: global or partial. The entities (represented by the geocodes) are in all globe (e. g. geographical ...

  3. Geohash - Wikipedia

    en.wikipedia.org/wiki/Geohash

    Geohash is a public domain geocode system invented in 2008 by Gustavo Niemeyer [2] which encodes a geographic location into a short string of letters and digits. Similar ideas were introduced by G.M. Morton in 1966. [ 3 ]

  4. Numeric precision in Microsoft Excel - Wikipedia

    en.wikipedia.org/wiki/Numeric_precision_in...

    Excel maintains 15 figures in its numbers, but they are not always accurate; mathematically, the bottom line should be the same as the top line, in 'fp-math' the step '1 + 1/9000' leads to a rounding up as the first bit of the 14 bit tail '10111000110010' of the mantissa falling off the table when adding 1 is a '1', this up-rounding is not undone when subtracting the 1 again, since there is no ...

  5. International Territorial Level - Wikipedia

    en.wikipedia.org/wiki/International_Territorial...

    International Territorial Level (ITL) is a geocode standard for referencing the subdivisions of the United Kingdom for statistical purposes, used by the Office for National Statistics (ONS). From 2003 and until 2020 it functioned as part of the European Union and European Statistical System 's geocode standard Nomenclature of Territorial Units ...

  6. Alphanumeric grid - Wikipedia

    en.wikipedia.org/wiki/Alphanumeric_grid

    An alphanumeric grid (also known as atlas grid [1]) is a simple coordinate system on a grid in which each cell is identified by a combination of a letter and a number. [2]An advantage over numeric coordinates such as easting and northing, which use two numbers instead of a number and a letter to refer to a grid cell, is that there can be no confusion over which coordinate refers to which ...

  7. Open Location Code - Wikipedia

    en.wikipedia.org/wiki/Open_Location_Code

    Plus Codes logo. The Open Location Code (OLC) is a geocode based on a system of regular grids for identifying an area anywhere on the Earth. [1] It was developed at Google's Zürich engineering office, [2] and released late October 2014. [3]

  8. GeoTime - Wikipedia

    en.wikipedia.org/wiki/Geotime

    Users can view real-time animated playback of data and use automated analysis tools within the software to identify location patterns, connections between events, and trends. [ 4 ] GeoTime can import data in many formats, such as GPX , Shapefile , KML , Microsoft Excel , CSV , geotagged photos , and from live data sources via GeoRSS and RSS web ...

  9. 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 ...