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  2. Geographic coordinate conversion - Wikipedia

    en.wikipedia.org/wiki/Geographic_coordinate...

    Conversion of coordinates and map positions among different map projections reference to the same datum may be accomplished either through direct translation formulas from one projection to another, or by first converting from a projection to an intermediate coordinate system, such as ECEF, then converting from ECEF to projection . The formulas ...

  3. Help:Tables and locations - Wikipedia

    en.wikipedia.org/wiki/Help:Tables_and_locations

    Click OK. The table will convert to the new format with the years as column headers. To avoid problems copy the table to a new sheet before further editing. See: "Only Copy Visible Cells" in Calc help. For more help see: LibreOffice: Pivot Tables and LibreOffice Help: Pivot Table. If necessary, convert state or country abbreviations to full names.

  4. Universal Transverse Mercator coordinate system - Wikipedia

    en.wikipedia.org/wiki/Universal_Transverse...

    The Universal Transverse Mercator (UTM) is a map projection system for assigning coordinates to locations on the surface of the Earth.Like the traditional method of latitude and longitude, it is a horizontal position representation, which means it ignores altitude and treats the earth surface as a perfect ellipsoid.

  5. List of sovereign states and dependent territories by ...

    en.wikipedia.org/wiki/List_of_sovereign_states...

    The list of sovereign states and dependent territories by continent data file is a plain text format describing the list of countries by continent, [1] suitable for automated processing. Format [ edit ]

  6. List of ISO 3166 country codes - Wikipedia

    en.wikipedia.org/wiki/List_of_ISO_3166_country_codes

    The sortable table below contains the three sets of ISO 3166-1 country codes for each of its 249 countries, links to the ISO 3166-2 country subdivision codes, and the Internet country code top-level domains (ccTLD) which are based on the ISO 3166-1 alpha-2 standard with the few exceptions noted. See the ISO 3166-3 standard for former country codes.

  7. ISO 3166-1 alpha-2 - Wikipedia

    en.wikipedia.org/wiki/ISO_3166-1_alpha-2

    Country name: English short name officially used by the ISO 3166 Maintenance Agency (ISO 3166/MA) Year: Year when alpha-2 code was first officially assigned ...

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  9. ISO 3166-1 - Wikipedia

    en.wikipedia.org/wiki/ISO_3166-1

    The alphabetic country codes were first included in ISO 3166 in 1974, and the numeric country codes were first included in 1981. The country codes have been published as ISO 3166-1 since 1997, when ISO 3166 was expanded into three parts, with ISO 3166-2 defining codes for subdivisions and ISO 3166-3 defining codes for former countries .