wikiTools (version 1.2.8)

w_Geoloc: Get Latitude and Longitude coordinates, and Country of places

Description

Get Latitude and Longitude coordinates of the Wikidata entities which are places. Also the countries they belong are returned.

Usage

w_Geoloc(entity_list, langsorder = "", nlimit = 1000, debug = FALSE)

Value

A data-frame with 'entity', label, Latitude and Longitude, country and label of the country.

Arguments

entity_list

A vector with de Wikidata entities (places).

langsorder

Order of languages in which the information will be returned, separated with '|'. If no information is given in the first language, next is used. If langsorder=='', then labels or descriptions are not returned.

nlimit

If the number of entities exceeds this number, chunked queries are done. This is the number of entities requested in each chunk. Please, reduce the default value if error is raised.

debug

For debugging purposes (default FALSE). If debug='info' information about chunked queries is shown. If debug='query' also the query launched is shown.

Author

Angel Zazo, Department of Computer Science and Automatics, University of Salamanca

Examples

if (FALSE) {
w_Geoloc(c("Q57860", "Q90", "Q15695"), langsorder="")
w_Geoloc(c("Q57860", "Q90", "Q15695"), langsorder="se") # Note label of place for Q15695
w_Geoloc(c("Q57860", "Q90", "Q15695"), langsorder="se|fr")
df <- w_SearchByOccupation(Qoc='Q2306091') # aprox. 20000
l <- df$entity
# Get birth-place (P19)
p <- w_Property(l, Pproperty = 'P19', includeQ=TRUE, langsorder='es|en', debug='info')
# Filter entities that have places
places <- p[grepl("^Q\\d+$", p$P19), ]$P19
g <- w_Geoloc(places, langsorder='en|es', debug='info')
}