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A first plot

So far, you've read in some spatial files, transformed spatial data to the same projection, and merged a data frame with a spatial object. Time to put your work together and see how your map looks. For each dataset, you need a tm_shape() call to specify the data source, followed by a tm_* layer (like tm_fill(), tm_borders() or tm_bubbles()) to draw on the map.

First, you'll add the neighborhoods and water areas to your plot from the previous exercise.

Este exercício faz parte do curso

Visualizing Geospatial Data in R

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Instruções do exercício

  • Add a layer for the water object with tm_shape(). Then use tm_fill() and set the color to "grey90".
  • Similarly, add a layer for the neighborhoods object. Use tm_borders() to draw the neighborhood outlines.

Exercício interativo prático

Experimente este exercício completando este código de exemplo.

library(tmap)

tm_shape(nyc_tracts_merge) +
  tm_fill(col = "estimate") +
  # Add a water layer, tm_fill() with col = "grey90"
  tm_shape(___)             +
  tm_fill(___)              +
  # Add a neighborhood layer, tm_borders()
                            +
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