This function connects to Czech State Administration of Land Surveying and Cadastre (https://www.cuzk.cz/en) API to reversely geocode an address. As consequence it is implemented only for Czech addresses.
coordinates to be reverse geocoded; expected as
Input of the function is a
sf data frame of spatial points, and
output a vector of characters.
The function returns the same
sf data frame as input, with added field
revgeocoded; it contains the result of operation. Should the data frame contain
a column named revgeocoded it will be overwritten.
In case of reverse geocoding failures (e.g. coordinates outside of the Czech Republic and therefore scope of ČÚZK) NA is returned.
In case of API failures (CUZK down) the function returns NAs again, with a message.
Usage of the ČÚZK API is governed by ČÚZK Terms & Conditions - https://geoportal.cuzk.cz/Dokumenty/Podminky.pdf.
sf data frame as input, with column revgeocoded added (or overwritten)
library(dplyr) library(sf) brno <- obce_polygony() %>% # shapefile of Brno filter(NAZ_OBEC == "Brno") %>% st_transform(5514) # planar CRS (eastings & northings) pupek_brna <- st_centroid(brno) # calculate centroid adresa_pupku <- revgeo(pupek_brna)$revgeocoded # address of the center
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