nominatimlite (version 0.1.6)

geo_lite_sf: Get spatial objects through geocoding

Description

This function allows you to geocode addresses and return the corresponding spatial object.

The parameter points_only specifies whether the function results will be points (all Nominatim results are guaranteed to have at least point geometry) or possibly other spatial objects.

Note that the type of geometry returned in case of points_only = FALSE will depend on the object being geocoded:

• administrative areas, major buildings and the like will be returned as polygons

• rivers, roads and their like as lines

• amenities may be points even in case of a points_only = FALSE call

The function is vectorized, allowing for multiple addresses to be geocoded; in case of points_only = FALSE multiple geometry types may be returned.

Usage

geo_lite_sf(
  address,
  limit = 1,
  return_addresses = TRUE,
  full_results = FALSE,
  verbose = FALSE,
  custom_query = list(),
  points_only = TRUE
)

Arguments

address

single line address (i.e. "1600 Pennsylvania Ave NW, Washington") or a vector of addresses (c("Madrid", "Barcelona")).

limit

maximum number of results to return per input address. Note that each query returns a maximum of 50 results.

return_addresses

return input addresses with results if TRUE. Note that most services return the input addresses with full_results = TRUE and setting return_addresses to FALSE does not prevent this.

full_results

returns all available data from the geocoding service if TRUE. If FALSE (default) then only latitude and longitude columns are returned from the geocoding service.

verbose

if TRUE then detailed logs are output to the console. FALSE is default. Can be set permanently with options(tidygeocoder.verbose = TRUE)

custom_query

API-specific parameters to be used, passed as a named list (i.e. list(countrycodes = "US")). See Details.

points_only

Logical TRUE/FALSE. Whether to return only spatial points (TRUE, which is the default) or potentially other shapes as provided by the Nominatim API (FALSE).

Value

A sf object with the results.

Details

See https://nominatim.org/release-docs/latest/api/Search/ for additional parameters to be passed to custom_query.

See Also

geo_lite()

Other spatial: bbox_to_poly(), geo_address_lookup_sf(), geo_amenity_sf(), reverse_geo_lite_sf()

Examples

# NOT RUN {
# Map - Points
library(ggplot2)
pentagon <- geo_lite_sf("Pentagon")


ggplot(pentagon) +
  geom_sf()

pentagon_poly <- geo_lite_sf("Pentagon", points_only = FALSE)

ggplot(pentagon_poly) +
  geom_sf()

# Several results

Madrid <- geo_lite_sf("Madrid",
  limit = 2,
  points_only = FALSE, full_results = TRUE
)


ggplot(Madrid) +
  geom_sf(fill = NA)

Starbucks <- geo_lite_sf("Starbucks, New York",
  limit = 20, full_results = TRUE
)


ggplot(Starbucks) +
  geom_sf()
# }