check_boundary()
function to check the lat and long are within limits.
check_list()
check the list in the dataset or not.
data_overview()
Data overview for usfertilizer
data_preparation()
Prepare data for visualization.
fertilizer
get_FIPS()
Get the FIPS code for the selected data.
get_data()
get_data
map_us_fertilizer()
Map the fertilizer data in U.S.A.
theme_map_fertilizer()
Create base map theme for further use. Adapted from theme maps. https://www.rdocumentation.org/packages/ggthemes/versions/3.5.0/source