小比例尺基础数据由1980坐标系向2000坐标系转换的方法

Transformation methods for less than 1∶5000 scale fundamental geographic information data from China geodetic coordinate system 1980 to CGCS2000

本文根据1∶5000以下比例尺4D产品数据量大、内容多、精度高的特点,利用坐标系重合点的坐标,研究了4D产品坐标由80系向2000系转换坐标改正量计算方法,确定了坐标转换模型,实现了1∶5000以小比例尺4D产品数据坐标系统的转换,通过实际应用证明该方法可实现1∶5000以小比例尺任意范围的地理信息数据无缝、高精度坐标转换,取得了良好的效果。

The article based on the peculiarity of less than 1 ： 5000 scale 4D products which is large data, more contents and high precision, used the coordinates of reference frame superposition points to study the coordinates correction calculation methods of transformation from China Geodetic Coordinate System 1980 to CGCS2000 for 4D products, then made certain coordinates transformation model to achieve coordinate systemtransformation for less than 1 ： 5000 scale 4D products. Practical application proved that this method could commendably achieve seamless and high precision coordinates transformation for less than 1 ： 5000 scale random bound fundamental geographic information data.