保存图片

https://rstudio-pubs-static.s3.amazonaws.com/16756_56e9817f4cab42ceae5bc28b788c2c01.html

添加点数据

https://duoduokou.com/r/66081366197546713702.html

添加刻度尺scale

Use grid.rect, grid.text and latticeExtra::layer.

添加指北针

Use sp::layout.north.arrow with latticeExtra::layer.

添加经纬网

How to overlay graticules (longitude - latitude lines)

The graticule package defines and draws graticules (longitude and latitude lines). The result can be combined with the levelplot output as shown in this gist.

rlnm了，这么复杂能不让ggplot爆锤么，要不是这个边际图比较好看方便谁TM用你这个破包