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一、问题的提出在农业学大寨、普及大寨县的群众运动中,为了发展农田基本建设事业,各地迫切需要大比例尺地形图,作为农田基本建设的规划和施工的基本资料。现有的地形图资料,一时赶不上形势的需要,所以,很多地方都着手测定本地区急需应用的地形图。由于目前国家控制点资料不足,使得不少地方难以在国家统一控制的系统下进行地形测量工作,这就产生了如何正确开展独立系统的图根控制测量,保证测图精度,以及将来如何有可能把这些资料与国家控制点联系起来的问题。本文就此根据我们的实践经验,提出一些意见。
First, the issue raised In the study of agriculture Dazhai, popular Dazhai County mass movement, in order to develop farmland infrastructures, all over the urgent need for large-scale topographic maps, as basic information of farmland capital construction planning and construction. The existing topographic map data can not keep up with the situation for some time. Therefore, many places are trying to determine the topographic maps urgently needed in the region. Due to the lack of information on the current state control points, it is difficult for many localities to conduct topographic surveys under the unified control of the state. This has led to the question of how to carry out the root-gravitation control measurements of independent systems correctly to ensure the accuracy of surveying and mapping and how it may be possible in the future The problem of linking these data with the state control points. This article based on our practical experience, put forward some comments.