Create base map theme for further use. Adapted from theme maps. https://www.rdocumentation.org/packages/ggthemes/versions/3.5.0/source

Create base map theme for further use. Adapted from theme maps. https://www.rdocumentation.org/packages/ggthemes/versions/3.5.0/source

theme_map_fertilizer(base_size = 9, base_family = "")

Arguments

base_size	the size for font in the map.
base_family	the font family in the map.

Examples

require(usfertilizer)
require(ggfertilizer)
data(us_fertilizer_county)
# Generate a map.
us_plot <- map_us_fertilizer(data = us_fertilizer_county,
Year = 2010, Nutrient = "N",
level = "county", facet="Year", Farm_Type = "farm")

# Add user_defined map theme.
us_plot = us_plot + theme_map_fertilizer(base_size = 12)