r - 重叠标签ggmap

Question

我有谷歌地图和带有文本标签的坐标列表。当我预览这个时，标签重叠，因此变得不可读:

library(ggmap)
WPmap <- qmap(c(lon=4.80324, lat=52.40738), zoom = 12,  source = "google")

表 kaart_rtw:

              Naam      lat     lon
1 Nieuw-Zeelandweg 52.40466 4.80214
2      Portsmuiden 52.39014 4.78554
3     Westhavenweg 52.41602 4.82282
4     Westhavenweg 52.41702 4.82282
5     Westhavenweg 52.41802 4.82282
6         Deccaweg 52.40196 4.83910
7     Coenhavenweg 52.40364 4.86195 

AmsterdamMap + geom_text(data = kaart_rtw, aes(label = kaart_rtw$Naam, x = X, y = Y)) 

有没有办法阻止重叠？

Answer 1

您可以考虑尝试ggrepel放置标签而不重叠:

library(ggmap)
install.packages("devtools")
devtools::install_github("slowkow/ggrepel")
library(ggrepel)

df <- read.table(text="Naam lat lon
Nieuw-Zeelandweg 52.40466 4.80214
Portsmuiden 52.39014 4.78554
Westhavenweg 52.41602 4.82282
Westhavenweg 52.41702 4.82282
Westhavenweg 52.41802 4.82282
Deccaweg 52.40196 4.83910
Coenhavenweg 52.40364 4.86195", header = TRUE, strip.white = TRUE)

roads <- get_map(location = c(lon = 4.82824, lat = 52.40738), zoom = 13, 
                 maptype = "roadmap", scale = 2)

ggmap(roads) +
  geom_point(
    data = df,
    aes(x = lon, y = lat),
    alpha = 0.5, fill = "red", size = 4, shape = 21
  ) +
  geom_label_repel(
    data = df,
    aes(x = lon, y = lat, label = df$Naam),
    box.padding = unit(2, "lines")
  ) +
  guides(fill = FALSE, alpha = FALSE)