grid reference
noun [ C ] uk/ˈɡrɪd ˌref.ər.əns/ us/ˈɡrɪd ˌref.ɚ.əns/
（地图）坐标方格
a position on a map that has been divided into squares by numbered lines going from one side to the other and from top to bottom so that you can find places easily on it
What's the grid reference of the village on this map? 地图上这个村子在哪个坐标方格里？