RGeo

RGeo is an extremely basic reverse geocoding library that provides location information based on a given %Geo.Point{}.

The library currently only provides extremely basic location information down to the country level. The goal was to only spend about an hour on the current iteration so there is a lot of features missing.

RGeo loads the entire countries dataset with 100m resolution into memory. Data is sourced from naturalearthdata.com

NOTE: Not tested thoroughly in production.

Installation

If available in Hex, the package can be installed by adding rgeo to your list of dependencies in mix.exs:

def deps do
  [
    {:rgeo, "~> 0.0.1-dev"}
  ]
end

Documentation can be generated with ExDoc and published on HexDocs. Once published, the docs can be found at https://hexdocs.pm/rgeo.

Example Usage

RGeo uses the felt/geo library to represent GeoJSON.

  # Add the RGeo.Backend to your supervision tree.
  # In a Phoenix application, it it would be a link in your children

  # Application.ex
  ...
  children = [
    RGeo.Backend
  ]

  Supervisor.start_link(children, opts)
  ...

  # Calling the library in your application
  RGeo.location_at(%Geo.Point{coordinates: {-74.0060, 40.7128}})
  {:ok, %RGeo.Location{
          continent: "North America",
          country: "United States of America",
          country_code2: "US",
          country_code3: "USA",
          country_long: "United States of America",
          region: "Americas",
          subregion: "Northern America"
        }}