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1956年黃河地形一二兩隊在施測故縣及东灣兩壩址的大比例尺圖时,由于山势陡峻視距限制很短,因而出現了垂直角普遍增大的新情况与新問題,一般角度均在10°,20°甚至30°以上,故縣壩址有的碎部点到50°以上。这样測总編印的大比例規范上“测站点往返高差每一百公尺不得超过4公分”的規定被嚴重的突破,有个别情况往返相差甚至到公尺以上,这就是当时生產上最尖銳的矛盾。后來改用了“三四等水准及
In 1956, when the large scale maps of the two counties of Yuxian County and East Bay were put into operation by the 122 team of the Yellow River Topography, the new situation and new problems that the vertical angle generally increased due to the short limit of the steep mountain range, The general point of view is 10 °, 20 ° or even 30 ° above, so some of the county dam site to more than 50 ° min. Such a test of the large scale of the total code printed on the “test station round-trip height of every 100 meters shall not exceed 4 cm,” the provisions of a serious breakthrough, there are some cases back and forth even more than a meter, which is the production of the most Sharp contradictions. Later switched to "34 and other standards and