CODEWITHSUNDEEP
rmapstmap
Andres Gonzalez
Andres Gonzalez

Reputation: 329

Do zoom of a city in a map R tmap

I am working with tmaps and I'm plotting Colombia's map, which has a very small city (city == "San Andrés"). When I plot the map I have this:

tm_shape(mapa_municipal) +
  tm_borders ()+
  tm_polygons("Ganador_20181V")

enter image description here

I have seen in some pages that it is possible to do a zoom to that part, like this: enter image description here

Does anybody knows how to do this? Thanks in advance!

Upvotes: 1

Views: 843

Answers (1)

Orlando Sabogal
Orlando Sabogal

Reputation: 1640

That is called a mini map or auxuliar map. In tmap you can do it by creating the two maps independetly and then pasting them together with the print() function. You will have to add a viewport in the vp argument.

For more information check this tutorial: https://orlando-sabogal.github.io/SpatialAnalysis-MontevideoWorkshop2019/Notebooks/tmap-tutorial.nb.html#auxiliar-map

The code would look something like this:

MontevideoMap <- tm_shape(Montevideo) + 
  tm_polygons() +
  tm_shape(Accidents) + tm_bubbles()
UruguayMap <- tm_shape(Uruguay) + 
  tm_polygons()
library(grid)
MontevideoMap
print(UruguayMap, vp = viewport(0.17, 0.8, width = 0.25, height = 0.25))

Upvotes: 2

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