问题
I want to convert two IPv4 addresses to latitude and longitude, then calculate the geographical distance between them.
Geokit says it can do this.
Seattle:
a = Geokit::Geocoders::GoogleGeocoder.geocode("207.244.147.34")
a.lat => 37.0483944, a.lng => 37.3421261 (should be 47.5839, -122.2995)
Edit: Okay below is an IP address for UK not SF, but its still UK not Turkey.
San Francisco:
b = Geokit::Geocoders::GoogleGeocoder.geocode("5.68.123.155")
a.lat => 14.6478672, a.lng => 120.9880659 (should be 37.7691, -122.4449)
a.distance_to(b) returns 5273.737623217472.
So apparently Seattle to San Fransisco is bit over 5000 miles and I am getting a great deal on airfare.
What am I missing?
回答1:
a and b as you are using does not correspond to Seattle and San Franscisco:
> a.city
=> "Gaziantep"
> a.country
=> "Turkey"
> b.city
=> "Caloocan"
> b.country
=> "Philippines"
Try:
> Geocoder.configure(ip_lookup: :freegeoip)
> a = Geocoder.search("74.200.247.59").first
=> #<Geocoder::Result::Freegeoip:0x007fc6df3cf930 @data={"ip"=>"207.244.147.34", "country_code"=>"US", "country_name"=>"United States", "region_code"=>"WA", "region_name"=>"Washington", "city"=>"Seattle", "zip_code"=>"98103", "time_zone"=>"America/Los_Angeles", "latitude"=>47.674, "longitude"=>-122.342, "metro_code"=>819}, @cache_hit=nil>
> b = ...
See https://github.com/alexreisner/geocoder/blob/091032059e6b47285e2be5ef82ad8b016f362069/test/unit/lookups/freegeoip_test.rb for the usage example.
来源：https://stackoverflow.com/questions/29460004/rails-geokit-incorrectly-converting-ipv4-address-to-latitude-and-longitude