MaxMind IP location script and confidence

gistfile1.txt

<script type="text/javascript" src="//js.maxmind.com/js/apis/geoip2/v2.1/geoip2.js"></script>
 
<script type="text/javascript">

var onSuccess = function(location){

	//alert(
	//	JSON.stringify(location, undefined, 4)
	//);
	vLat = location.location.latitude;
	vLon = location.location.longitude;
	vCty = location.city.names.en;
	vCon = location.city.confidence;
	
	campus = new Array();
	
	campus['aviation'] = distance(vLat, vLon, 36.776811, -119.728209);
	campus['bakersfield'] = distance(vLat, vLon, 35.352791, -119.062098);	
	campus['fresno'] = distance(vLat, vLon, 36.829833, -119.783895);
	campus['hanford'] = distance(vLat, vLon, 36.325945, -119.647951);	
	campus['hesperia'] = distance(vLat, vLon, 34.420752, -117.383147);
	campus['lancaster'] = distance(vLat, vLon, 34.648455, -118.148371);	
	campus['madera'] = distance(vLat, vLon, 36.976678, -120.082490);
	campus['modesto'] = distance(vLat, vLon, 37.717470, -121.092853);	
	campus['ontario'] = distance(vLat, vLon, 34.069910, -117.552116);
	campus['ranchocordova'] = distance(vLat, vLon, 38.593699, -121.288151);	
	campus['sandiego'] = distance(vLat, vLon, 32.634322, -117.078490);
	campus['temecula'] = distance(vLat, vLon, 33.525832, -117.166448);	
	campus['visalia'] = distance(vLat, vLon, 36.328082, -119.384942);
	
	//var index = 0;
	//var value = temp[0];
	var oStr = "";
	for (var i in campus){
		oStr = oStr + i + ' ' + campus[i] + '\n';
	// if (temp[i] < value) {
	//    value = temp[i];
	//    index = i;
	//  }
	}
	alert(oStr);

};
 
var onError = function(error){
	// location not found via IP
};

geoip2.insights(onSuccess, onError);

function distance(lat1, lon1, lat2, lon2) {
	var R = 6371;
	var a = 0.5 - Math.cos((lat2 - lat1) * Math.PI / 180)/2 + Math.cos(lat1 * Math.PI / 180) * Math.cos(lat2 * Math.PI / 180) * (1 - Math.cos((lon2 - lon1) * Math.PI / 180))/2;
	return R * 2 * Math.asin(Math.sqrt(a));
}
 
</script>