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  1. The Luzon Datum of 1911 is a geodetic datum that served as the base for the first modern survey of the Philippine Islands. It was defined by Station Balanacan as its origin point. The station’s geodetic latitude and longitude are N 13° 33′ 41.000″ and E 121° 52′ 03.000″ respectively.

    Luzon Datum of 1911 in Mogpog, Marinduque - Out of Town Blog

    outoftownblog.com/luzon-datum-of-1911-in-mogpog-marinduque/
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    What was the Luzon Datum of 1911?
    The Luzon Datum of 1911 was the base for the first modern survey of the Philippine Islands. The execution of the triangulation of the Philippine Islands extended over almost as long a time as the history of the American occupation in the Philippines.

    Luzon Datum of 1911 - Wikipedia

    en.wikipedia.org
    Why did you visit Luzon Datum of 1911 site in Marinduque?
    That is why I had much appreciation to finally visit the Luzon Datum of 1911 site in Marinduque. A pivotal reference point used to triangulate networks of different datums in the country. It is, literally the center of the Philippines in a geodetic sense.

    Luzon Datum of 1911 : At the Geodetic Center of the Philippines

    ironwulf.net
    What is the coordinate system for Luzon & Mindoro?
    Luzon (west of 122°E); Mindoro. Coordinate system: Cartesian 2D CS. Axes: easting, northing (X,Y). Orientations: east, north. UoM: m. Philippines - onshore excluding Mindanao. EPSG:25393 Projected coordinate system for Philippines - onshore approximately between 120°E and 122°E. Luzon (west of 122°E); Mindoro.

    Luzon 1911 / Philippines zone III - EPSG:25393

    epsg.io
    When was the Luzon Datum established?
    In 1911, these different networks on different datums and with different origins were consolidated into one nationwide network and the Luzon Datum was established with triangulation station Balanacan as its datum origin. The Luzon Datum became the primary geodetic reference of all surveys in the Philippines.

    Luzon Datum of 1911 - Wikipedia

    en.wikipedia.org
    How accurate is the Philippines - Mindanao onshore map?
    Philippines - Mindanao onshore. , accuracy 44.0 m, code 1162 Remarks: Derived at 1 station. Accuracy 25m in each axis. Information source: U.S. Defense Mapping Agency TR8350.2 September 1987. Scope: Engineering survey, topographic mapping. Remarks: Replaced by PRS92 / Philippines zone 4 (CRS code 3124).

    Luzon 1911 / Philippines zone IV - EPSG:25394

    epsg.io
    When did the USCGS start working in the Philippines?
    After the establishment of the sub-office known as the Manila Field Station, which was housed in the old Intendencia Building in the Walled City of Intramuros, the USCGS commenced fieldwork in the Philippine Islands in January 1901. At that time, an insurrection was in progress and the Islands were under military law.

    Luzon Datum of 1911 - Wikipedia

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  3. EPSG.io
    https://epsg.io/25393

    Luzon 1911 / Philippines zone III - EPSG:25393

    • EPSG:4253

      Geodetic CRS: Luzon 1911. Datum: Luzon 1911. Ellipsoid: Clarke 1866. Prime …

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  4. Wikipedia
    https://en.wikipedia.org/wiki/Luzon_Datum_of_1911

    Luzon Datum of 1911 - Wikipedia

  5. Images of Luzon 1911 Coordinates

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  6. EPSG.io
    https://epsg.io/1161

    Luzon 1911 to WGS 84 (1) - EPSG:1161

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  7. EPSG.io
    https://epsg.io/4253

    Luzon 1911 - EPSG:4253

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    Geodetic Datum
  8. Spatial Reference
    https://spatialreference.org/ref/epsg/25392

    EPSG:25392 Luzon 1911 / Philippines zone II - Spatial Reference

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  9. Spatial Reference
    https://spatialreference.org/ref/epsg/25391

    EPSG:25391 Luzon 1911 / Philippines zone I - Spatial Reference

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  10. Spatial Reference
    https://spatialreference.org/ref/epsg/25394

    EPSG:25394 Luzon 1911 / Philippines zone IV -- Spatial Reference

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  11. 12.105.40.62
    http://12.105.40.62:8080/25393

    Luzon 1911 / Philippines zone III - EPSG:25393

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    Luzon 3
    Zone 3 Philippines
  12. Tool-Online
    https://tool-online.com/index/systemes-coordonnees/philippines.html

    Available coordinate systems for Philippines: - tool-online

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  13. EPSG.io
    https://epsg.io/25394-1162

    Luzon 1911 / Philippines zone IV - EPSG:25394

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