英文:
R: Inserting a geom_sf layer on top of another geom_sf layer
问题
我想绘制一个法国地图，使用 geom_sf，然后在地图上添加一个德国的图层。
这是我做的：
library(ggplot2)
library(sf)
library(raster)
fr_sf = st_as_sf(getData("GADM", country = "FRA", level = 1))
de_sf = st_as_sf(getData("GADM", country = "DEU", level = 0))
ggplot(fr_sf) +
geom_sf(fill = "gray90") +
geom_sf(de_sf, fill = "gray90")
但是我得到了一个错误消息 "mapping 必须由 aes() 创建"。
我尝试使用 geom_sf(de_sf, fill = "gray90")[[1]]，但是我得到了相同的错误。
请问有人可以帮忙吗？
英文:
I would like to plot a map of France using geom_sf and then add a layer to map Germany.
Here's what I did
library(ggplot2)
library(sf)
library(raster)
fr_sf = st_as_sf(getData("GADM",country="FRA",level=1))
de_sf = st_as_sf(getData("GADM",country="DEU",level=0))
ggplot(fr_sf) +
geom_sf(fill = "gray90") +
geom_sf(de_sf, fill = "gray90")
but I get an error mapping` must be created by `aes()
I tried with geom_sf(de_sf, fill = "gray90")[[1]], but I got the same error.
Could some help, please?
答案1
得分: 1
使用data = ，如下所示：
library(ggplot2)
library(sf)
# Loading required package: sp
fr_sf <- st_as_sf(getData("GADM", country = "FRA", level = 1))
de_sf <- st_as_sf(getData("GADM", country = "DEU", level = 0))
ggplot(data = fr_sf) +
geom_sf(fill = "gray90") +
geom_sf(data = de_sf, fill = "gray90")
Created on 2023-01-08 with reprex v2.0.2
英文:
Use data = like
library(ggplot2)
library(sf)
# Loading required package: sp
fr_sf <- st_as_sf(getData("GADM", country = "FRA", level = 1))
de_sf <- st_as_sf(getData("GADM", country = "DEU", level = 0))
ggplot(data = fr_sf) +
geom_sf(fill = "gray90") +
geom_sf(data = de_sf, fill = "gray90")
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<sup>Created on 2023-01-08 with reprex v2.0.2</sup>
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