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  2. Luzon Datum of 1911 - Wikipedia

    en.wikipedia.org/wiki/Luzon_Datum_of_1911

    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. [1] [2] [3]

  3. A 1890 Maps of the Philippines — depicting the distributions of its tribes and languages. ... determination method or standard: SHA-1. data size. 483,163 byte ...

  4. Velarde map - Wikipedia

    en.wikipedia.org/wiki/Velarde_map

    The Philippines believes that the label Panacot on the map refers to the Scarborough Shoal, and it is the first map with label Panacot on it. [ 20 ] [ 21 ] Professor Li Xiaocong of China pointed out that the label Panacot in the 1734 map was not Scarborough Shoal, and the three groups of islands, Galit, Panacot and Lumbay also appeared in the ...

  5. Triangulation (surveying) - Wikipedia

    en.wikipedia.org/wiki/Triangulation_(surveying)

    On land, the cartographer Gemma Frisius proposed using triangulation to accurately position far-away places for map-making in his 1533 pamphlet Libellus de Locorum describendorum ratione (Booklet concerning a way of describing places), which he bound in as an appendix in a new edition of Peter Apian's best-selling 1524 Cosmographica. This ...

  6. Triangulation (social science) - Wikipedia

    en.wikipedia.org/wiki/Triangulation_(social_science)

    In the social sciences, triangulation refers to the application and combination of several research methods in the study of the same phenomenon. [1] By combining multiple observers, theories, methods, and empirical materials, researchers hope to overcome the weakness or intrinsic biases and the problems that come from single method, single-observer, and single-theory studies.

  7. Instructional materials - Wikipedia

    en.wikipedia.org/wiki/Instructional_materials

    3D model used for teaching geometry. Instructional materials, also known as teaching materials, learning materials, or teaching/learning materials (TLM), [1] are any collection of materials including animate and inanimate objects and human and non-human resources that a teacher may use in teaching and learning situations to help achieve desired learning objectives.

  8. File:Blank map of the Philippines (Provinces).svg - Wikipedia

    en.wikipedia.org/wiki/File:Blank_map_of_the...

    You are free: to share – to copy, distribute and transmit the work; to remix – to adapt the work; Under the following conditions: attribution – You must give appropriate credit, provide a link to the license, and indicate if changes were made.

  9. Geodetic control network - Wikipedia

    en.wikipedia.org/wiki/Geodetic_control_network

    The precise orientation to the geographic north is achieved through methods of geodetic astronomy. The principal instruments used are theodolites and tacheometers , which nowadays are equipped with infrared distance measuring, data bases , communication systems and partly by satellite links.