(Difference between revisions)

Calculating the distance between two locations in Symbian Web Runtime

From Nokia Developer Wiki
Jump to: navigation, search
Forum Nokia KB (Talk | contribs)
m (Protected "CS001175 - Calculating the distance between two locations" [edit=sysop:move=sysop])
tanjaluodes (Talk | contribs)
Line 131: Line 131:
* [http://www.forum.nokia.com/document/Web_Developers_Library/GUID-53CE4DE6-F065-4339-8C18-5C30A9540053.html Web Developer's Library: JavaScript Location Service API]
* [http://www.forum.nokia.com/document/Web_Developers_Library/GUID-53CE4DE6-F065-4339-8C18-5C30A9540053.html Web Developer's Library: JavaScript Location Service API]
[[Category:Web Runtime (WRT)]][[Category:S60 Platform Services]][[Category:Code Examples]]
[[Category:Web Runtime (WRT)]][[Category:S60 Platform Services]][[Category:Code Examples]][[Category:Code Snippet]]

Revision as of 12:17, 21 January 2010


Article Metadata
Tested with
Devices(s): Nokia 5800 XpressMusic
Platform(s): S60 5th Edition
Keywords: device.getServiceObject(), Service.Location, Service.Location.GetLocation(), Service.Location.Calculate()
Created: (17 Nov 2008)
Last edited: tanjaluodes (21 Jan 2010)


This code snippet demonstrates how to calculate the distance between two locations using the Location Service API of Web Runtime (WRT).

Source: widget.xhtml

<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN"
<html xmlns="http://www.w3.org/1999/xhtml">
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8"/>
<link rel="StyleSheet" href="style/general.css" type="text/css" />
<script type="text/javascript" src="script/script.js" />
<title>WRT Application</title>
<div id="bodyContent" class="bodyContent">
<input type="button" value="Display distance"
onclick="displayDistance();" />

Source: script.js

var serviceObj = null;
var distanceCriteria = null;
window.onload = init;
// Initializes the widget
function init() {
// Obtain the Location service object
try {
serviceObj = device.getServiceObject("Service.Location", "ILocation");
} catch (ex) {
alert("Service object cannot be found.");
// Initialize the criteria for the service object
criteria = new Object();
criteria.LocationInformationClass = "BasicLocationInformation";
distanceCriteria = new Object();
distanceCriteria.MathRequest = "FindDistance";
function displayDistance() {
if (serviceObj == null) {
alert("Service object has not been initialized.");
// Obtain the location information (asynchronous)
try {
var result = serviceObj.ILocation.GetLocation(criteria,
} catch (ex) {
// Called when the location data has been obtained
function locationDataReady(transId, eventCode, result) {
// On error situation, display the error message
if (eventCode == 4) {
alert("Error " + result.ErrorCode + ": " + result.ErrorMessage);
// The source location is where the device now is
var srcLocation = new Object();
srcLocation.Latitude = result.ReturnValue.Latitude;
srcLocation.Longitude = result.ReturnValue.Longitude;
srcLocation.Altitude = result.ReturnValue.Altitude;
// The destination location is initialized to specific coordinates
var destLocation = new Object();
destLocation.Latitude = 61.0;
destLocation.Longitude = 24.0;
destLocation.Altitude = 0;
// Calculate the distance between the source and the destination
var distance = calculateDistance(srcLocation, destLocation);
// Display the distance rounded to two decimals
alert(distance.toFixed(2) + " m");
// Calculates the distance from the source location to the destination location
function calculateDistance(srcLocation, destLocation) {
var distance = 0.0;
distanceCriteria.DistanceParamSource = srcLocation;
distanceCriteria.DistanceParamDestination = destLocation;
try {
var distResult = serviceObj.ILocation.Calculate(distanceCriteria);
distance = distResult.ReturnValue;
} catch (ex) {
distance = undefined;
return distance;


The distance between two locations is displayed.

See also

82 page views in the last 30 days.

Was this page helpful?

Your feedback about this content is important. Let us know what you think.


Thank you!

We appreciate your feedback.