dismo (version 0.8-17)

geocode: Georeferencing with Google

Description

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. The purpose of using this function should be to display the locations on a map in a browser. You should check the Google terms of use http://code.google.com/apis/maps/terms.html to see if your usage of this function (and the underlying Google API) is permitted.

Usage

geocode(x, oneRecord=FALSE, extent=NULL, progress='', ...)

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"
...
additional arguments (currently none implemeted)

Value

  • data.frame with the following fields:
  • originalPlacethe locality description as provided (in argument x)
  • interpretedPlacethe locality as interpreted by the Google API
  • lonlongitude
  • latlatitude
  • lonminminimum longitude of the bounding box
  • lonmaxmaximum longitude of the bounding box
  • latminminimum latitude of the bounding box
  • latmaxmaximum latitude of the bounding box
  • uncertaintydistance from c(lon, lat) to the farthest corner of the bounding box

See Also

biogeomancer

Examples

Run this code
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)

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