Google地图勾经纬度工具,使用方式:点击画线后点击鼠标进行选点,选点后会打印点击的坐标点并画线,可以撤销和清除画线-Google Maps latitude and longitude hook tool, click the mouse to draw a line and click on the choice of site, will print the selected point coordinates of the point and click to draw lines,

简单的三角网生成算法 能根据在屏幕上的选点来构建三角网(Triangulation algorithm simple to construct triangulation net according to the location on the screen)