utm投影正转，实现经纬度到平面坐标的转变,utm projection is to achieve the latitude and longitude coordinates of the plane change

读取txt文件中的经纬度数据，先去除重复的数据，然后计算多点距离，将适合的点保存在Excel文件中-Txt file to read the latitude and longitude data to remove duplicate data, and then calculate the multi-point distance that will fit the latitude and longitude points stored in the Excel file

经纬度生成图幅号VB源码 经纬度生成图幅号VB源码-mappable unit-VC code