Geonames::Data

Library for working with Geonames data.

Installation

Add this line to your application's Gemfile:

gem 'geonames-data'

And then execute:

$ bundle

Or install it yourself as:

$ gem install geonames-data

Usage

To load a set of Geonames features:

Geonames::Data.load_features("cities1000.txt")

Some of the Geonames files can be unworkably huge, so you can provide a filter block to load_features. The following example will load only airports:

Geonames::Data.load_features("allCountries.txt") do |feature|
  feature.feature_code == "AIRP"
end

Indexing

Once you've got a set of features, you will probably want to index them somehow. There are two classes provided for this: Geonames::Data::NameIndex and Geonames::Data::LocationIndex.

Name index

Geonames::Data::NameIndex indexes Geonames features by name, including their ASCII name and all alternate names.

cities = Geonames::Data.load_features("cities1000.txt")
index = Geonames::Data::NameIndex.new(cities)
index["Melbourne"]

Location index

Geonames::Data::LocationIndex indexes Geonames features by geolocation (latitude and longitude).

Geonames::Data.load_features("allCountries.txt") do |feature|
  feature.feature_code == "AIRP"
end
index = Geonames::Data::NameIndex.new(cities)
index.nearest(-37.814, 144.96332)

Contributing

  1. Fork it ( http://github.com//geonames-data/fork )
  2. Create your feature branch (git checkout -b my-new-feature)
  3. Commit your changes (git commit -am 'Add some feature')
  4. Push to the branch (git push origin my-new-feature)
  5. Create new Pull Request