# Geolocation distance from current location

You must Login before you can answer or comment on any questions.

I'm trying to find an example of how to calculate the distance from the current location to a POI. I have a list of POIs that I need to display in a tableview along with the distance value based on the current location. Thanks

## 3 Answers

var velo = {}; velo.getDistance = function(lat1,lon1,lat2,lon2) { var R = 6371000000; // m (change this constant to get miles) 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 Math.round(d); };

I believe you will find this and more at this link

A similar question in stack overflow might give you more insight on the issues involved in calculating distances

Answered well here.

## Your Answer

Think you can help? Login to answer this question!