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一九五○年我们施测绥四烏梁素海。这个海子是由後套(綏西)各大渠退水所形成,東西長约二十公里,南北寬約三十公里,总面積達六百平方公里。其中有些地区蘆草叢生,视線甚难通過。這样大的面积、情况又是这样复杂,我們就採用沿海周围设立控制點,海内设立简便测塔,控制整个面积。地形的测法,一般的是视距法。这里由於面积
In 1950 we applied Sui Si Wuliangsuhai. This sea child is formed by the back cover (Suixi) drainage channels formed by the east-west about 20 kilometers, 30 kilometers wide north-south, with a total area of 600 square kilometers. In some areas, there are many varieties of grasses, and the sight is difficult to pass. With such a large area, the situation is so complicated that we have adopted the establishment of control points along the coastline and the establishment of a simple tower measuring tower in our country to control the entire area. Topography method, the general is the line of sight method. Here because of the area