Reverse geocoding with data frames

Reverse geocoding from latitude and longitude pairs to the names and addresses of a location.

Usage

oc_reverse_df(...)

# S3 method for class 'data.frame'
oc_reverse_df(
  data,
  latitude,
  longitude,
  bind_cols = TRUE,
  output = c("short", "all"),
  language = NULL,
  min_confidence = NULL,
  roadinfo = FALSE,
  no_annotations = TRUE,
  no_dedupe = FALSE,
  abbrv = FALSE,
  address_only = FALSE,
  ...
)

# S3 method for class 'numeric'
oc_reverse_df(
  latitude,
  longitude,
  output = c("short", "all"),
  language = NULL,
  min_confidence = NULL,
  no_annotations = TRUE,
  no_dedupe = FALSE,
  abbrv = FALSE,
  address_only = FALSE,
  ...
)

Arguments

...

Ignored.

data

A data frame.

latitude, longitude

Unquoted variable names of numeric columns or vectors of latitude and longitude values.

bind_cols

When bind_col = TRUE, the default, the results are column bound to data. When FALSE, the results are returned as a new tibble.

output

A character vector of length one indicating whether only the formatted address ("short", the default) or all variables ("all") variables should be returned.

language

Character vector, or an unquoted variable name of such a vector, of IETF BCP 47 language tags (such as "es" for Spanish or "pt-BR" for Brazilian Portuguese). OpenCage will attempt to return results in that language. Alternatively you can specify the "native" tag, in which case OpenCage will attempt to return the response in the "official" language(s). In case the language parameter is set to NULL (which is the default), the tag is not recognized, or OpenCage does not have a record in that language, the results will be returned in English.

min_confidence

Numeric vector of integer values, or an unquoted variable name of such a vector, between 0 and 10 indicating the precision of the returned result as defined by its geographical extent, (i.e. by the extent of the result's bounding box). See the API documentation for details. Only results with at least the requested confidence will be returned. Default is NULL).

roadinfo

Logical vector, or an unquoted variable name of such a vector, indicating whether the geocoder should attempt to match the nearest road (rather than an address) and provide additional road and driving information. Default is FALSE.

no_annotations

Logical vector, or an unquoted variable name of such a vector, indicating whether additional information about the result location should be returned. TRUE by default, which means that the results will not contain annotations.

no_dedupe

Logical vector, or an unquoted variable name of such a vector. Default is FALSE. When TRUE the results will not be deduplicated.

abbrv

Logical vector, or an unquoted variable name of such a vector. Default is FALSE. When TRUE addresses in the oc_formatted variable of the results are abbreviated (e.g. "Main St." instead of "Main Street").

address_only

Logical vector, or an unquoted variable name of such a vector. Default is FALSE. When TRUE only the address details are returned in the oc_formatted variable of the results, not the name of a point-of-interest should there be one at this address.

Value

A tibble. Column names coming from the OpenCage API are prefixed with "oc_".

See also

oc_reverse() for inputs as vectors, or oc_forward() and oc_forward() for forward geocoding. For more information about the API and the various parameters, see the OpenCage API documentation.

Examples

if (FALSE) { # oc_key_present() && oc_api_ok()

library(tibble)
df <- tibble(
  id = 1:4,
  lat = c(-36.85007, 47.21864, 53.55034, 34.05369),
  lng = c(174.7706, -1.554136, 10.000654, -118.242767)
)

# Return formatted address of lat/lng values
oc_reverse_df(df, latitude = lat, longitude = lng)

# Return more detailed information about the locations
oc_reverse_df(df,
  latitude = lat, longitude = lng,
  output = "all"
)

# Return results in a preferred language if possible
oc_reverse_df(df,
  latitude = lat, longitude = lng,
  language = "fr"
)

# oc_reverse_df accepts unquoted column names for all
# arguments except bind_cols and output.
# This makes it possible to build up more detailed queries
# through the data frame passed to the data argument.

df2 <- add_column(df,
  language = c("en", "fr", "de", "en"),
  confidence = c(8, 10, 10, 10)
)

# Use language column to specify preferred language of results
# and confidence column to allow different confidence levels
oc_reverse_df(df2,
  latitude = lat, longitude = lng,
  language = language,
  min_confidence = confidence
)
}