Skip to contents

Zoom a map to show only certain features

Source: R/coord_automap_zoom.R
coord_automap_zoom.Rd

This is a wrapper around coord_automap() that automatically calculates coordinate limits based on the data and/or any additional locations. The bounding box will be calculated to encompass all of the included locations.

Usage

coord_automap_zoom(include = NULL, include_data = TRUE, feature_type = NA, ...)

Arguments

include

Vector of feature names that should be shown on the map.

include_data

Scalar logical, if true then all features with data are also included.

feature_type

Type of map feature. See feature_types() for a list of registered types. If NA, the type is guessed based on the values in feature_names.

...

Additional arguments passed to coord_automap().

Value

A zoom specification that can be added to a ggplot object with ggplot2::%+%.

Details

This should be added to the plot after the call to one of the ggautomap geoms. It will copy the location aethetic mapping from the first such layer in the plot. If there is no such layer, it will attempt to use the data and location mapping found at the top level ggplot() call.

See also

coord_automap()

Examples

library(ggplot2)

# zoom in on locations that have data:
cartographer::nc_type_example_2 |>
  ggplot(aes(location = county)) +
  geom_boundaries(feature_type = "sf.nc") +
  geom_choropleth() +
  coord_automap_zoom(feature_type = "sf.nc")


# or just zoom in on specific locations regardless of the data:
cartographer::nc_type_example_2 |>
  ggplot(aes(location = county)) +
  geom_boundaries(feature_type = "sf.nc") +
  coord_automap_zoom(include = c("Rowan", "Polk"), include_data = FALSE, feature_type = "sf.nc")