Hello Everyone, any one has idea abt geocode ? in rails I want to find distance in miles between 2 points , I have lattitude and longitude of both points , how can i do that ? please help me thanks

on 2009-02-19 09:02

on 2009-02-19 10:55

Cyrus D. 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

on 2009-02-19 10:57

Thanks Andrew but is there a way that i can do with geo code kit ? any idea ? Andrew P. wrote: > Cyrus D. 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

on 2009-02-19 11:02

On Thu, Feb 19, 2009 at 12:57 AM, Cyrus D. < removed_email_address@domain.invalid> wrote: > >> > > lon1=self.longitude * RadConv > > > > return d; > > end > Hi, please read the following: http://geokit.rubyforge.org/ Good luck, -Conrad