grid meridian

例句：

1. 1. The grid meridianis used to determine the location of acity on a map.
   网格子午线用于确定城市在地图上的位置。
2. 2. Thegrid meridian is crucial for accuratenavigation and mapping.
   网格子午线对于精确导航和制图至关重要。
3. 3. The gridmeridian is an essential tool forsurveying and mapping.
   网格子午线是勘测和制图的必备工具。