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  2. United States Coast and Geodetic Survey - Wikipedia

    en.wikipedia.org/wiki/United_States_Coast_and...

    Ignorant of the Survey's operations and the scientific methods that lay behind them, he left such matters to his assistant, Benjamin J. Colonna, and focused instead on reforming the Survey's financial and budgetary procedures and improving its operations so as to demonstrate the value of its scientific program in performing accurate mapping ...

  3. Restrictions on geographic data in China - Wikipedia

    en.wikipedia.org/wiki/Restrictions_on_geographic...

    Foreign individuals or organizations that wish to conduct surveying must form a Chinese-foreign joint venture. [1] Between 2006 and 2011, the authorities pursued around 40 illegal cases of mapping and surveying. [6] The media has reported on other cases of unlawful surveys:

  4. Surveying - Wikipedia

    en.wikipedia.org/wiki/Surveying

    Surveying students with their professor at the Helsinki University of Technology in the late 19th century. Most countries' governments regulate at least some forms of surveying. Their survey agencies establish regulations and standards. Standards control accuracy, surveying credentials, monumentation of boundaries and maintenance of geodetic ...

  5. American Congress on Surveying and Mapping - Wikipedia

    en.wikipedia.org/wiki/American_Congress_on...

    The American Congress on Surveying and Mapping (ACSM) was an American professional association representing the interests of those engaged in measuring and communicating geospatial data. [1] Originally, it was composed of four organizations: American Association for Geodetic Surveying (AAGS) National Society of Professional Surveyors (NSPS)

  6. National mapping agency - Wikipedia

    en.wikipedia.org/wiki/National_mapping_agency

    The State Bureau of Surveying and Cartography compiles topographic maps at 1:25,000 and 1:50,000 scales. It is reported that these maps are accurate and attractively printed in seven colors, and that successive editions show progressive improvement in accuracy. [18] These large-scale maps are the basis for maps at smaller scales.

  7. Triangulation (surveying) - Wikipedia

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

    Triangulation can also refer to the accurate surveying of systems of very large triangles, called triangulation networks. This followed from the work of Willebrord Snell in 1615–17, who showed how a point could be located from the angles subtended from three known points, but measured at the new unknown point rather than the previously fixed ...

  8. U.S. National Geodetic Survey - Wikipedia

    en.wikipedia.org/wiki/U.S._National_Geodetic_Survey

    The National Geodetic Survey (NGS) is a United States federal agency based in Washington, D.C. that defines and manages a national coordinate system, providing the foundation for transportation and communication, mapping and charting, and a large number of science and engineering applications.

  9. Geodetic control network - Wikipedia

    en.wikipedia.org/wiki/Geodetic_control_network

    Electronic distance measurement (EDM) was introduced around 1960, when the prototype instruments became small enough to be used in the field. Instead of using only sparse and much less accurate distance measurements some control networks were established or updated by using trilateration more accurate distance measurements than was previously possible and no angle measurements.