Who are the famous surveyors?

Before abraham lincoln, the first16th president of the United States, was 25 years old, Lincoln had no fixed job and made a living everywhere. As an adult, he became a local land surveyor. Because he is proficient in measurement and calculation, he is often invited by people to solve land boundary disputes. Thomas Jefferson, the third president of the United States, was not only a political career, but also an expert in surveying, agriculture, gardening, architecture, etymology, archaeology, mathematics, cryptography and paleontology. He is also a writer, lawyer and violinist; Founder of the University of Virginia. Many people think that he is the cleverest of all American presidents. At the dinner hosted by 1962 for 49 Nobel laureates, John F. Kennedy said to a group of social elites, "I think the White House has gathered the most talents and human knowledge tonight-maybe not when Jefferson ate here alone." ("I think this is the most extraordinary collection of talents and human knowledge ever gathered in the White House, except perhaps when Thomas Jefferson dined alone." Yu Ningjinsheng, an academician of China Academy of Sciences, is an honorary part-time professor at the International Institute of Space Surveying and Earth Sciences (ITC) in the Netherlands, director of the Steering Committee of the National College Surveying and Mapping Church, deputy director of the Hubei Provincial College Evaluation Committee, editor-in-chief of the second edition of Encyclopedia of China, and editor-in-chief of Dacihai Branch. Research direction: physical geodesy of the earth's gravity field. Title: Geodetic Master and Geographer. Kong Xiangyuan is an academician of China Academy of Sciences. The main contributions are as follows: "The range expansion of precision laser rangefinder ME-5000 and the development of MAF- 1 portable frequency meter". Wang China Academy of Sciences, an expert in aerial photogrammetry and remote sensing. Honorary President and Professor of Wuhan Surveying and Mapping University. In the 1940s, the affine transformation of aerial vertical photography beam was published, which was of great value to the stereo mapping technology at that time. In 1950s, a formula with higher accuracy was put forward in view of the deficiency of the relative orientation formula of foreign experts in mountainous areas. The errors of aerial surveying and mapping method and aerial triangulation method are analyzed theoretically, and the accuracy estimation formulas of each method are derived, which provides theoretical basis for production. In the early 1960s, China first put forward the encryption theory and scheme of analytic aerial triangulation. In the 1980s, he directed the completion of the national key scientific research project "Full Digital Mapping System".