This paper approaches the reference datum of GPS and electronic map from concepts model, and analyses the basic relations of coordinate transformation.
从概念模型的角度探讨了GPS和电子地图的参考基准问题。
This paper approaches the reference datum of GPS and electronic map from concepts model, and analyses the basic relations of coordinate transformation.
从概念模型的角度探讨了GPS和电子地图的参考基准问题。
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