On Aug 19, 7:02 am, shah <[email protected]> wrote: > google.maps.LatLng.prototype.distanceFrom = function (newLatLng) { > > //var R = 6371; // km (change this constant to get miles) > > var R = 6378100; // meters > > var lat1 = this.lat(); > > var lon1 = this.lng(); > > var lat2 = newLatLng.lat(); > > var lon2 = newLatLng.lng(); > > var dLat = (lat2 - lat1) * Math.PI / 180; > > var dLon = (lon2 - lon1) * Math.PI / 180; > > var a = Math.sin(dLat / 2) * Math.sin(dLat / 2) + > > Math.cos(lat1 * Math.PI / 180) * Math.cos(lat2 * Math.PI / > 180) * > > Math.sin(dLon / 2) * Math.sin(dLon / 2); > > var c = 2 * Math.atan2(Math.sqrt(a), Math.sqrt(1 - a)); > > var d = R * c; > > return d; > > } > > usage : > > var point = new google.maps.LatLng(lat,lng) > var distance = point.distanceFrom(anotherPoint);
Why do it the hard way. That is built into the geometry library. http://code.google.com/apis/maps/documentation/javascript/geometry.html -- Larry > > On Aug 19, 8:50 am, Natxo Vergara <[email protected]> wrote: > > > > > > > > > Thanks a lot ! (though you have made me feel a little dumb ;) ) > > > bests > > > 2011/8/18 [email protected] <[email protected]> > > > > On Aug 18, 9:25 am, Natxo Vergara <[email protected]> wrote: > > > > Hi Larry! > > > > > I have the same issue as Shaheryar Ali: I'm new here in the neibourhood, > > > and > > > > I'm playing a little bit with the google maps API (v3). > > > > Now I'm trying to get the distance between two points (two LatLng points > > > > selected randomly by clicking on the map). > > > > > I've found an old tutorial (corresponding to api v2) with the function > > > > "LatLng.distanceFrom", but I just can't find any thing like that for v3. > > > > I've read the doc related to Directions, but it seems that it's a little > > > too > > > > complicated just to calculate the distance between two (any two) points > > > in > > > > the map. > > > > > Is there something that I'm missing?? > > > > Have you seen the geometry library? > > >http://code.google.com/apis/maps/documentation/javascript/geometry.html > > > > -- Larry > > > > > Thanks a lot for your time and congratulations for the phenomenal and > > > > amazing job you do on Google. > > > > > Bests. > > > > > Natxo Vergara > > > > -- > > > You received this message because you are subscribed to the Google Groups > > > "Google Maps JavaScript API v3" group. > > > To post to this group, send email to > > > [email protected]. > > > To unsubscribe from this group, send email to > > > [email protected]. > > > For more options, visit this group at > > >http://groups.google.com/group/google-maps-js-api-v3?hl=en. -- You received this message because you are subscribed to the Google Groups "Google Maps JavaScript API v3" group. To post to this group, send email to [email protected]. To unsubscribe from this group, send email to [email protected]. For more options, visit this group at http://groups.google.com/group/google-maps-js-api-v3?hl=en.
