geocode

0th

Percentile

Georeferencing with Google

A wrapper around the Google geocoding web-service. It returns 0 to n matches. It is important to be as precise as possible, e.g. always include the country in the locality description.

Keywords
spatial
Usage
geocode(x, oneRecord=FALSE, extent=NULL, progress='', geocode_key, ...)
Arguments
x

A vector of locality descriptions

oneRecord

Logical. If TRUE a single record for each item in x is returned. If the API returned multiple records, the values of this record are computed by averaging the coordinates and taking the union of all bounding boxes

extent

An Extent object, or an object that can be coerced to one, to bias the search towards that region

progress

Character. Valid values are "" (no progress indicator), "text" or "window"

geocode_key

character. Your Google API key for geocoding (and billing). See https://developers.google.com/maps/documentation/geocoding/get-api-key)

...

additional arguments (currently none implemeted)

Value

data.frame with the following fields:

originalPlace

the locality description as provided (in argument x)

interpretedPlace

the locality as interpreted by the Google API

lon

longitude

lat

latitude

lonmin

minimum longitude of the bounding box

lonmax

maximum longitude of the bounding box

latmin

minimum latitude of the bounding box

latmax

maximum latitude of the bounding box

uncertainty

distance from c(lon, lat) to the farthest corner of the bounding box

Note

It is important to compare fields originalPlace and interpretedPlace as the Google interpretation of a (perhaps vague) locality description can be very speculative

Aliases
  • geocode
Examples
# NOT RUN {
geocode(c('1600 Pennsylvania Ave NW, Washington DC', 'Luca, Italy', 'Kampala'))
geocode(c('San Jose', 'San Jose, Mexico'))
geocode(c('San Jose', 'San Jose, Mexico'), oneRecord=TRUE)
# }
Documentation reproduced from package dismo, version 1.3-3, License: GPL (>= 3)

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