Filter observations within circle

Source: R/points_in_circle.R

Filter all observations in a data.frame that fall within a circle of a specified radius drawn around a given latitude and longitude point.

points_in_circle(
  data,
  lon_center,
  lat_center,
  lon = lon,
  lat = lat,
  radius = 200
)

Arguments

data

data.frame with at least columns for longitude and latitude.

lon_center

numeric. Representing the longitude of the circle's center.

lat_center

numeric. Representing the latitude of the circle's center.

lon

column name in data containing longitudes (default is lon).

lat

column name in data containing latitudes (default is lat).

radius

radius of the circle in meters (default is 200m).

Value

A subset of the input data.frame containing only the observations that fall within the specified circle.

Author

Martin Haringa

Examples

points_in_circle(Groningen, lon_center = 6.571561, lat_center = 53.21326,
radius = 60)
#> # A tibble: 3 × 10
#>   street    number letter suffix postal_code city    lon   lat amount distance_m
#>   <chr>      <int> <chr>  <chr>  <chr>       <chr> <dbl> <dbl>  <dbl>      <dbl>
#> 1 Heresing…      5 NA     NA     9711EP      Gron…  6.57  53.2      5       31.4
#> 2 Heresing…     11 NA     NA     9711ER      Gron…  6.57  53.2     11       47.8
#> 3 Zuiderpa…   1003 NA     NA     9724AK      Gron…  6.57  53.2   1003       57.6