Peter Lubbers - Pro HTML 5 Programming

108
CHAPTER 4 ■ USING THE HTML5 GEOLOCATION API
The Final Code
The full code sample is shown in Listing 4-14.
Listing 4-14. Complete distance tracker code
HTML5 Geolocation Odometer
HTML5 Geolocation Distance Tracker
HTML5 Geolocation is not supported in your browser.
Current Position:
Latitude
?
Longitude
?
Accuracy
?
Last Timestamp
?
Current distance traveled: 0.0 km
Total distance traveled: 0.0 km
var totalDistance = 0.0;
var lastLat;
var lastLong;
function toRadians(degree) {
return degree * Math.PI / 180;
}
function distance(latitude1, longitude1, latitude2, longitude2) {
// R is the radius of the earth in kilometers
var R = 6371;