How to plot data on map without coordinates? - r

Question

I am trying to plot dataframe like:
code name description estimate
0 Australia Vegetables 854658
0 Australia Fruit 667541
1 New South Wales Vegetables 45751
1 New South Wakes Fruit 77852
2 Victoria Vegetables 66211
2 Victoria Fruit 66211
.
.
.
For each region in Australia there are multiple rows with different description. What packages may I use to plot a map with estimate without coordinates?
I try ggplot and ozmaps with sf which mentioned in ggplot2 tutorial, and I filter the dataframe for only fruit, but there is error message :
stat_sf requires the following missing aesthetics: geometry
the code I tried :
ggplot() +
geom_sf(oz_states,mapping=aes())+
geom_sf(df,mapping=aes()) +
coord_sf()
The methods I found are all required langitude and latitude to plot the data map, I tried ggmaps or geom_ploygon but didn't figure out the correct way to do so. Is there a possible way to plot map with only region labels?
this is what I plot by tableau, and this is expected plot by using r as well:

Answer 1

So essentially, your first problem is that you're calling the wrong object within the ozmaps package. it's ozmap_states, meanwhile you called yours oz_states
I came up with this solution that I think takes what you want and elevates it.
df <- data.frame(code = rep(c(0,1,2), 2), name = rep(c("Australia", "New South Wales", "Victoria"), 2), description = rep(c("Vegetables", "Fruit"), 3), count =
c(854658, 45751, 66211, 667541, 77852, 66211))
library(tidyverse)
library(sf)
library(ozmaps)
library(leaflet)
library(tmap)
states_full <- right_join(df, ozmap_states, by = c("name" = "NAME"))
data <- states_full %>%
filter(description == "Fruit") %>%
select(name, geometry, count)
ozmap1 = tm_shape(ozmap_states) +tm_polygons()
tmap_mode("view")
ozmap1 + tm_shape(st_as_sf(data)) + tm_fill(col = "count")
Basically, instead of using the sample dataframe that I created from your data, you would just use your data in the right join. You can also choose whether you want fruits or vegetables in your filter function.
The tmap package is a mapping package that can make interactive leaflet like maps.
You can look at some tutorials here: https://geocompr.robinlovelace.net/adv-map.html
End solution looks something like this.
Note: This solution uses lng/lat, but it pulls it directly from the shape file for oz state maps in the ozmaps package, therefore fulfilling the need of the question.
When you add in more data, more of Australia will be colored in depending on their count.