arcgis经纬网

<table cellspacing="0" cellpadding="0" style="word-wrap: break-word; empty-cells: show; border-collapse: collapse; line-height: normal; width: 600px; table-layout: fixed; margin-left: 1px; "><tr ><td><font color="#000" style="word-wrap: break-word; line-height: normal; "><font face="Simsun " style="word-wrap: break-word; line-height: normal; "><p align="left" style="word-wrap: break-word; margin-top: 0px; margin-right: 0px; margin-bottom: 0px; margin-left: 0px; padding-top: 0px; padding-right: 0px; padding-bottom: 0px; padding-left: 0px; line-height: normal; ">各位大侠，arcgis在NEW GRID中画的经纬网怎么是相互垂直的直线？以通过坐标转换成大地坐标了为什么加的经纬网还是相互垂直的的，即经线、纬线都是直线而不是弧线</p></font></font></td></tr></table>