绘制网格外部的点作为箭头指向R中的ggplot2的数据

I am generating maps with world-scale data, and then zooming in to certain regions. On the zoomed-in view, I would like to show that there are other data points outside the bounding box, by putting arrowheads that point from the center of the box to where the data point is in the outside world. I am generating maps with world-scale data, and