equilong circle arc grid

例句：

1. 1. The equilong circlearc grid is used to measure the distancebetween two points on a map.
   等长圆弧网格用于测量地图上两点之间的距离。
2. 2.The equilong circle arc gridwas developed to improve the accuracy of mapping.
   等长圆弧网格的开发是为了提高制图的准确度。
3. 3. The equilong circle arcgrid is commonly used in surveying and mapping.
   等长圆弧网格在测量和制图中被广泛使用。