全国第二次土地调查中坐标系统转换问题探讨——以陕西省靖边县行政界限转换为例

Discussion on the coordinate system conversion problem during the second national land survey——A case study of the administrative boundaries conversion of Jingbian county,Shaanxi province

在全国土地第二次调查中,为充分利用已有1954年北京坐标系的资料,需进行坐标系统转换,尤其是行政界线资料,各个行政单位的管辖范围基本上不会发生变化,因此第一次土地调查的成果资料有很高的利用价值.利用ArcGIS软件下提供的精校正功能,通过选取同名地物点的方法实现1954年北京坐标系与1980年西安坐标系之间的转换,并对转换后的数据精度进行评价,评价结果表明,转换的结果可以满足全国第二次土地调查的精度要求.

To take full advantage of the information of Beijing 1954 coordinate system,a coordinate system conversion is needed in the second national land survey.In particular,the information on administrative boundaries is more important,as the jurisdiction of the various administrative units would not change basically,and so the result of the first land survey data is of great value.With the correction function provided by the ArcGIS software and the method of choosing the same feature points,the coordinate system conversion between Beijing 1954 coordinates and Xi' an 1980 coordinates is realized,and then the data conversion accuracy is evaluated.It shows that the result of coordinate transformation meets the second national land survey accuracy requirements.