CODEWITHSUNDEEP
rggplot2r-sf
popcorn
popcorn

Reputation: 51

Using annotation_map_tile in ggplot to add a basemap to a single point

I'm trying to use annotate_map_tile() from ggplot2 to add a basemap to my ggplot maps. I've had success using it with geom_sf() layers, but it is throwing an error with a single point loaded through geom_point().

Here's the code:

site<- data.frame(longitude = -75.144353, latitude = 39.917631)

ggplot()+
  annotation_map_tile("cartolight")+
  geom_point(data = site, aes(x = longitude, y = latitude), size = 5)

The error reads "Error in grid.Call.graphics(C_raster, x$raster, x$x, x$y, x$width, x$height, : cannot allocate memory block of size 67108864 Tb". Any help?

Upvotes: 3

Views: 3191

Answers (1)

mfherman
mfherman

Reputation: 432

If you convert your point to an sf object and then plot it using geom_sf() it seems to work just fine. One reason your code is failing is that annotation_map_tile() doesn't know which tiles to pull because you haven't specified any data for it.

library(tidyverse)
library(sf)
library(ggspatial)

site <- data.frame(longitude = -75.144353, latitude = 39.917631) %>% 
  st_as_sf(coords = c("longitude", "latitude"), crs = 4326)

ggplot(site) +
  annotation_map_tile("cartolight") +
  geom_sf(size = 5)

Upvotes: 4

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