问题
I need to find the city and state from a zip code. Does anyone know a good plugin/API that I can use to do this?
回答1:
gem install geokit
In IRB:
require 'geokit'
geo = GeoKit::Geocoders::MultiGeocoder.multi_geocoder('90210')
if geo.success
geo.state # => CA
geo.city # => Beverly Hills
end
回答2:
A more lightweight option is the Area gem.
require 'area'
'11211'.to_region #=> "Brooklyn, NY"
回答3:
See Jason's answer. It works nicely.
The problem is that the USPS doesn't allow bulk downloads of their zip-code lists unless you pay for it. Google's API, which is used in the gem mentioned by Splashlin, no longer seems to support the city and state, instead it now returns the area code:
require 'open-uri'
require 'json'
json = JSON::parse(open('http://maps.google.com/maps/geo?q=852581').read)
puts json
# >> {"name"=>"852581", "Status"=>{"code"=>602, "request"=>"geocode"}}
This page shows some ways you could roll your own. The sources of the data might not be current though:
http://www.ruby-forum.com/topic/48815
来源：https://stackoverflow.com/questions/3935062/best-zip-code-plugin-for-ruby