并在大量实验的基础上指出，从原始数据图像到等经纬度投影图的纠正过程中不宜采用间接的多项式拟合法。
It is unsuitable to directly adopt indirect polynomial correction method in the process from raw data to longitude latitude projection image.
本文从投影教学的特点和作用出发，指出教师开展投影教学应具备的知识，并分析了教师在投影教学过程中存在的问题及纠正这些问题的方法。
The article points out the teachers knowledge in projection teaching from its characteristics and functions and analyzed the problems which exist in teaching process.
本文从投影教学的特点和作用出发，指出教师开展投影教学应具备的知识，并分析了教师在投影教学过程中存在的问题及纠正这些问题的方法。
The article points out the teachers knowledge in projection teaching from its characteristics and functions and analyzed the problems which exist in teaching process.
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