get_geo_entity: Retrieve geographic information from Wikidata

In Ironholds/WikidataR: API Client Library for 'Wikidata'

Description

get_geo_entity retrieves the item ID, latitude and longitude of any object with geographic data associated with another object with geographic data (example: all the locations around/near/associated with a city).

Usage

get_geo_entity(entity, language = "en", radius = NULL, ...)

Arguments

entity	a Wikidata item (Q...) or series of items, to check for associated geo-tagged items.
language	the two-letter language code to use for the name of the item. "en" by default, because we're imperialist anglocentric westerners.
radius	optionally, a radius (in kilometers) around entity to restrict the search to.
...	further arguments to pass to httr's GET.

Value

a data.frame of 5 columns:

• item the Wikidata identifier of each object associated with entity.

• name the name of the item, if available, in the requested language. If it is not available, NA will be returned instead.

• latitude the latitude of item

• longitude the longitude of item

• entity the entity the item is associated with (necessary for multi-entity queries).

See Also

get_geo_box for using a bounding box rather than an unrestricted search or simple radius.

Examples

# All entities
sf_locations <- get_geo_entity("Q62")

# Entities with French, rather than English, names
sf_locations <- get_geo_entity("Q62", language = "fr")

# Entities within 1km
sf_close_locations <- get_geo_entity("Q62", radius = 1)

# Multiple entities
multi_entity <- get_geo_entity(entity = c("Q62", "Q64"))

Ironholds/WikidataR documentation built on May 7, 2019, 6:38 a.m.