Geo Code

Cyrus Dev wrote:

I want to find distance in miles between 2 points , I have lattitude and
longitude of both points ,

I do this (inside a model what has latitude and longitude attributes)

RadConv=(Math::PI/180)
R=3958

   def get_distance_to(to_lat, to_lon)
     lat1=self.latitude * RadConv
     lon1=self.longitude * RadConv
     lat2=to_lat * RadConv
     lon2=to_lon * RadConv

     diff_lon = (lon2 - lon1).abs
     diff_lat = (lat2 - lat1).abs

     a = Math.sin(diff_lat/2) * Math.sin(diff_lat/2) + Math.cos(lat1) * Math.cos(lat2) * Math.sin(diff_lon/2) * Math.sin(diff_lon/2);
     c = 2 * Math.atan2(Math.sqrt(a), Math.sqrt(1-a));
     d = R * c;

     return d;
   end

Hi, please read the following:

http://geokit.rubyforge.org/

Good luck,

-Conrad