1、R语言绘制海岸线边界
 参考:
 Drawing beautiful maps programmatically with R, sf and ggplot2 — Part 1: Basics
 使用R绘制世界地图及纬度统计图
 Drawing maps with R. A basic tutorial:https://dr2blog.hcommons.org/2020/03/23/drawing-maps-with-r-a-basic-tutorial/
准备工作:安装所需要的包,如install.packages("rnaturalearth")等等。
 测试:
library(ggplot2)
library(rnaturalearth)coast <- ne_coastline(scale = "small", returnclass = "sf")
ggplot(data = coast) + geom_sf() + theme_classic()
结果:
 
 如果想只显示指定区域:
library(ggplot2)
library(rnaturalearth)coast <- ne_coastline(scale = "small", returnclass = "sf")
xlim <- c(-175, 175)  # 经度范围
ylim <- c(-55, 80)    # 纬度范围ggplot(data = coast) + geom_sf() + coord_sf(xlim = xlim, ylim = ylim) + theme_classic()
参考资料:
 1、ggplot2 for ocean data:https://hansenjohnson.github.io/ggplot2_tutorial/