Good morning/evening
in the years I've used R extensively (mostly the package ggplot2) in order to produce high resolution plots of my data. Since I'm about to start a new project that involves analyzing snow samples across Antarctica, I want to plot the different locations on the continent... problem is, I mostly plot with R, and I'd like to keep using it, but when I search for how to plot coordinates in R, most people focuses on the rest of the world and discard the Antarctic continent. Does anyone know any way to quickly plot coordinates in R? Or direct me to some sources I can study in order to solve this problem?
Hello Raffaello,
First, convert your data.frame that contains the coordinates to an sf object by sf::st_as_sf(). Set the 'crs' argument according to the coordinate reference system in which your coordinates are stored. E.g. use 4326 in the case of WGS-84 (longitude+latitude). Then transform you sf object to a CRS that is more suited to the extent of your data. E.g. in the case of Antarctica, Antarctic Polar Stereographic (3031) seems to be a good choice. Then plot it with sf::plot() or ggplot2::ggplot().
HTH,
Ákos
Hi, there are a number of packages for plotting spatial data. You might have a look at package sf as the successor of sp. This will direct you also to packages gdal, raster, etc.
Have you explored the ggmap package? You are required to set up an API key through Google but it is worth it. Once this is set up, plotting should be as simple as:
library(ggplot2); library(ggmap)
register_google(key = YOUR API KEY)
map
You may also use "leaflet" package and leaflet() %>% addTiles( your data, lat, lng)
You may also use "leaflet" package in R
library(leaflet)
data %>%
leaflet() %>%
addProviderTiles(provider$OpenStreetMap) %>%
addMarkers(ong = ~long, lat= ~lat, popup=..., label =..., group= "...")
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