公共点数据（6个）.txt

测绘行业中用于计算两种直角坐标系下坐标转换需要的七参数。该方法具有通用性

-2850017.4720 4690744.5225 3237959.9725 -2850023.9497 4680915.4702 3237036.8089  	
-2838514.0744 4704426.8235 3228266.3341 -2838520.5570 4694597.9568 3227343.6466  
-2865534.8833 4672522.4133 3250504.9271 -2865541.3037 4662693.0793 3249581.2094  
-2831988.2672 4639803.8041 3325394.3271 -2831996.3411 4629974.7937 3324471.1958  
-2828112.6536 4649775.2984 3314823.5928 -2828120.6115 4639946.4678 3313900.6500  
-2855329.6573 4630358.1765 3318638.7826 -2855337.4429 4620529.0691 3317715.1436