| choropleth | Create choropleth map | 
| choropleth_ggplot2 | Map object of class sf using ggplot2 | 
| concentration | Concentration calculation | 
| convert_crs_df | Convert Coordinate Reference System (CRS) | 
| find_highest_concentration | Find highest concentration | 
| Groningen | Coordinates of houses in Groningen | 
| haversine | Haversine great circle distance | 
| highest_concentration | Highest concentration risk | 
| insurance | Sum insured per postal code in the Netherlands | 
| interpolate_spline | Splines on the sphere | 
| knmi_historic_data | Retrieve historic weather data for the Netherlands | 
| knmi_stations | KNMI stations | 
| neighborhood_gh_search | Search for coordinates with higher concentrations within geohash | 
| nl_corop | Object of class 'sf' for COROP regions in the Netherlands | 
| nl_gemeente | Object of class 'sf' for municipalities in the Netherlands | 
| nl_postcode2 | Object of class 'sf' for 2-digit postcode regions in the Netherlands | 
| nl_postcode3 | Object of class 'sf' for 3-digit postcode regions in the Netherlands | 
| nl_postcode4 | Object of class 'sf' for 4-digit postcode regions in the Netherlands | 
| nl_provincie | Object of class 'sf' for provinces in the Netherlands | 
| plot.conc | Automatically create a plot for objects obtained from highest_concentration() | 
| plot.concentration | Automatically create a plot for objects obtained from 'find_highest_concentration()' | 
| plot.neighborhood | Automatically create a plot for objects obtained from neighborhood_gh_search() | 
| plot_points | Create map with points | 
| points_in_circle | Filter observations within circle | 
| points_in_circle_vec | Filter observations within circle (vectorized) | 
| points_to_polygon | Map points to polygons |