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  2. White House (Casa Grande, Arizona) - Wikipedia

    en.wikipedia.org/wiki/White_House_(Casa_Grande...

    The White House in Casa Grande in Pinal County, Arizona is a Tudor Revival house built c. 1929. It was listed on the National Register of Historic Places in 1985. [1] [2] It was noted to be the best example in Casa Grande of a Tudor Period Revival House. It was the home of J.W. White, a long-time resident who had an electrical company in Casa ...

  3. Executive Residence - Wikipedia

    en.wikipedia.org/wiki/Executive_Residence

    This level was added during the 1948–1952 renovation, [1] [2] [3] and contains the air conditioning and water softening equipment. [4] [5] [6] The sub-basement and mezzanine also contain storage areas, the heating system, elevator machinery rooms, an incinerator, a medical clinic, a dentist's office, [6] the electrical control system, [1] a laundry room, [6] [1] [7] and flatware and dishware ...

  4. Longitude - Wikipedia

    en.wikipedia.org/wiki/Longitude

    A longitude is thus specified in sexagesimal notation as, for example, 23° 27′ 30″ E. For higher precision, the seconds are specified with a decimal fraction . An alternative representation uses degrees and minutes, and parts of a minute are expressed in decimal notation, thus: 23° 27.5′ E. Degrees may also be expressed as a decimal ...

  5. Sexagesimal - Wikipedia

    en.wikipedia.org/wiki/Sexagesimal

    Sexagesimal, also known as base 60, [1] is a numeral system with sixty as its base. It originated with the ancient Sumerians in the 3rd millennium BC, was passed down to the ancient Babylonians , and is still used—in a modified form—for measuring time , angles , and geographic coordinates .

  6. Map Room (White House) - Wikipedia

    en.wikipedia.org/wiki/Map_Room_(White_House)

    The Map Room is a room on the ground floor of the White House, the official home of the president of the United States. The Map Room takes its name from its use during World War II, when Franklin Roosevelt used it as a situation room where maps were consulted to track the war's progress (for such purposes, it was later replaced by the West Wing ...

  7. Geographic coordinate conversion - Wikipedia

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

    A coordinate system conversion is a conversion from one coordinate system to another, with both coordinate systems based on the same geodetic datum. Common conversion tasks include conversion between geodetic and earth-centered, earth-fixed coordinates and conversion from one type of map projection to another.

  8. Decimal degrees - Wikipedia

    en.wikipedia.org/wiki/Decimal_degrees

    Decimal degrees (DD) is a notation for expressing latitude and longitude geographic coordinates as decimal fractions of a degree.DD are used in many geographic information systems (GIS), web mapping applications such as OpenStreetMap, and GPS devices.

  9. Public Land Survey System - Wikipedia

    en.wikipedia.org/wiki/Public_Land_Survey_System

    Particularly in New England, this system was supplemented by drawing town plats. The metes and bounds system was used to describe a town of a generally rectangular shape, 4 to 6 miles (6.4 to 9.7 km) on a side. Within this boundary, a map or plat was maintained that showed all the individual lots or properties.