使用geom_sf时如何删除边框线? [英] How can I remove border lines when using geom_sf?

问题描述

我尝试执行以下操作:

ggplot(geography) + geom_sf(aes(fill=rate, color = NULL))

但这并没有消除边界线.

but that didn't get rid of the border lines.

推荐答案

没有可重复的示例，很难确切地知道您要查找的内容.但是，我会猜测您正在寻找一种方法来抑制标记不同多边形(区域)之间边界的线，例如，抑制在世界地图上显示国家边界的线.如果是这样，那么这里是一个解决方案.

Without a reproducible example it is difficult to know exactly what you are looking for. However, I will take a guess that your are looking for a way to suppress the lines marking boundaries between different polygons (regions), e.g., suppress the lines showing country borders on a map of the world. If that is so then here is a solution.

示例(您可能需要下载ggplot2的开发版本)

Example (you might need to download the developmental version of ggplot2)

# devtools::install_github("tidyverse/ggplot2")
library(ggplot2)
library(maps) 
library(maptools)
library(rgeos)
library(sf)

world1 <- sf::st_as_sf(map('world', plot = FALSE, fill = TRUE))

with_boundary <-
  ggplot() +
    geom_sf(data = world1, mapping = aes(fill = ID)) +
  theme(legend.position = "none") +
  ggtitle("With Country Boundaries")

without_boundary <-
  ggplot() +
    geom_sf(data = world1, mapping = aes(fill = ID), lwd = 0) +
  theme(legend.position = "none") +
  ggtitle("Without Country Boundaries")

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