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Thursday, April 19, 2012

Calculate Distance between two points, Get Driving Time - Advanced Distance Finder Tutorial

So you need to find distance between two places on the map and the shortest route. You need to get the driving time between these places

Demo Download

[sourcecode language="javascript"]
<html>
<head>
<title>Distance finder</title>
<meta type="<a>description</a>" content="<a>Find the distance between two .</a>"/>

<script type="<a>text/javascript</a>" src="<a href="view-source:http://maps.google.com/maps/api/js?sensor=true">http://maps.google.com/maps/api/js?sensor=true</a>"></script>
<script type="<a>text/javascript</a>">

var location1;
var location2;

var address1;
var address2;

var latlng;
var geocoder;
var map;

var distance;

// finds the coordinates for the two locations and calls the showMap() function
function initialize()
{
geocoder = new google.maps.Geocoder(); // creating a new geocode object

// getting the two address values
address1 = document.getElementById("address1").value;
address2 = document.getElementById("address2").value;

// finding out the coordinates
if (geocoder)
{
geocoder.geocode( { 'address': address1}, function(results, status)
{
if (status == google.maps.GeocoderStatus.OK)
{
//location of first address (latitude + longitude)
location1 = results[0].geometry.location;
} else
{
alert("Geocode was not successful for the following reason: " + status);
}
});
geocoder.geocode( { 'address': address2}, function(results, status)
{
if (status == google.maps.GeocoderStatus.OK)
{
//location of second address (latitude + longitude)
location2 = results[0].geometry.location;
// calling the showMap() function to create and show the map
showMap();
} else
{
alert("Geocode was not successful for the following reason: " + status);
}
});
}
}

// creates and shows the map
function showMap()
{
// center of the map (compute the mean value between the two locations)
latlng = new google.maps.LatLng((location1.lat()+location2.lat())/2,(location1.lng()+location2.lng())/2);

// set map options
// set zoom level
// set center
// map type
var mapOptions =
{
zoom: 1,
center: latlng,
mapTypeId: google.maps.MapTypeId.HYBRID
};

// create a new map object
// set the div id where it will be shown
// set the map options
map = new google.maps.Map(document.getElementById("map_canvas"), mapOptions);

// show route between the points
directionsService = new google.maps.DirectionsService();
directionsDisplay = new google.maps.DirectionsRenderer(
{
suppressMarkers: true,
suppressInfoWindows: true
});
directionsDisplay.setMap(map);
var request = {
origin:location1,
destination:location2,
travelMode: google.maps.DirectionsTravelMode.DRIVING
};
directionsService.route(request, function(response, status)
{
if (status == google.maps.DirectionsStatus.OK)
{
directionsDisplay.setDirections(response);
distance = "The distance between the two points on the chosen route is: "+response.routes[0].legs[0].distance.text;
distance += "<br/>The aproximative driving time is: "+response.routes[0].legs[0].duration.text;
document.getElementById("distance_road").innerHTML = distance;
}
});

// show a line between the two points
var line = new google.maps.Polyline({
map: map,
path: [location1, location2],
strokeWeight: 7,
strokeOpacity: 0.8,
strokeColor: "#FFAA00"
});

// create the markers for the two locations
var marker1 = new google.maps.Marker({
map: map,
position: location1,
title: "First location"
});
var marker2 = new google.maps.Marker({
map: map,
position: location2,
title: "Second location"
});

// create the text to be shown in the infowindows
var text1 = '<div id="content">'+
'<h1 id="firstHeading">First location</h1>'+
'<div id="bodyContent">'+
'<p>Coordinates: '+location1+'</p>'+
'<p>Address: '+address1+'</p>'+
'</div>'+
'</div>';

var text2 = '<div id="content">'+
'<h1 id="firstHeading">Second location</h1>'+
'<div id="bodyContent">'+
'<p>Coordinates: '+location2+'</p>'+
'<p>Address: '+address2+'</p>'+
'</div>'+
'</div>';

// create info boxes for the two markers
var infowindow1 = new google.maps.InfoWindow({
content: text1
});
var infowindow2 = new google.maps.InfoWindow({
content: text2
});

// add action events so the info windows will be shown when the marker is clicked
google.maps.event.addListener(marker1, 'click', function() {
infowindow1.open(map,marker1);
});
google.maps.event.addListener(marker2, 'click', function() {
infowindow2.open(map,marker1);
});

// compute distance between the two points
var R = 6371;
var dLat = toRad(location2.lat()-location1.lat());
var dLon = toRad(location2.lng()-location1.lng());

var dLat1 = toRad(location1.lat());
var dLat2 = toRad(location2.lat());

var a = Math.sin(dLat/2) * Math.sin(dLat/2) +
Math.cos(dLat1) * Math.cos(dLat1) *
Math.sin(dLon/2) * Math.sin(dLon/2);
var c = 2 * Math.atan2(Math.sqrt(a), Math.sqrt(1-a));
var d = R * c;

document.getElementById("distance_direct").innerHTML = "<br/>The distance between the two points (in a straight line) is: "+d;
}

function toRad(deg)
{
return deg * Math.PI/180;
}
</script>

</head>

<body bgcolor="<a>#eeeeee</a>">
<div id="<a>form</a>" style="<a>width:100%; height:20%</a>">
<table align="<a>center</a>" valign="<a>center</a>">
<tr>
<td colspan="<a>7</a>" align="<a>center</a>"><b>Find the distance between two locations</b></td>
</tr>
<tr>
<td colspan="<a>7</a>"> </td>
</tr>
<tr>
<td>First address:</td>
<td> </td>
<td><input type="<a>text</a>" name="<a>address1</a>" id="<a>address1</a>" size="<a>50</a>"/></td>
<td> </td>
<td>Second address:</td>
<td> </td>
<td><input type="<a>text</a>" name="<a>address2</a>" id="<a>address2</a>" size="<a>50</a>"/></td>
</tr>
<tr>
<td colspan="<a>7</a>"> </td>
</tr>
<tr>
<td colspan="<a>7</a>" align="<a>center</a>"><input type="<a>button</a>" value="<a>Show</a>" onclick="<a>initialize();</a>"/></td>
</tr>
</table>
</div>
<center><div style="<a>width:100%; height:10%</a>" id="<a>distance_direct</a>"></div></center>
<center><div style="<a>width:100%; height:10%</a>" id="<a>distance_road</a>"></div></center>

<center><div id="<a>map_canvas</a>" style="<a>width:70%; height:54%</a>"></div></center>
</body>
</html>
[/sourcecode]

Calculate distance - Distance Finder Tutorial

This tutorial demonstrates how to calculate distance between two locations.
Try with your Google Map API key.

Demo Download

Here is the complete source code.

[sourcecode language="javascript"]
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN"
"http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<meta http-equiv="content-type" content="text/html; charset=UTF-8"/>
<title>Calculate distance with Google Maps API</title>
<script src="http://maps.google.com/maps?file=api&v=2&key=YOUR_GOOGLE_MAP_API_KEY" type="text/javascript"></script>

<script type="text/javascript">

var geocoder, location1, location2;

function initialize() {
geocoder = new GClientGeocoder();
}

function showLocation() {
geocoder.getLocations(document.forms[0].address1.value, function (response) {
if (!response || response.Status.code != 200)
{
alert("Sorry, we were unable to geocode the first address");
}
else
{
location1 = {lat: response.Placemark[0].Point.coordinates[1], lon: response.Placemark[0].Point.coordinates[0], address: response.Placemark[0].address};
geocoder.getLocations(document.forms[0].address2.value, function (response) {
if (!response || response.Status.code != 200)
{
alert("Sorry, we were unable to geocode the second address");
}
else
{
location2 = {lat: response.Placemark[0].Point.coordinates[1], lon: response.Placemark[0].Point.coordinates[0], address: response.Placemark[0].address};
calculateDistance();
}
});
}
});
}

function calculateDistance()
{
try
{
var glatlng1 = new GLatLng(location1.lat, location1.lon);
var glatlng2 = new GLatLng(location2.lat, location2.lon);
var miledistance = glatlng1.distanceFrom(glatlng2, 3959).toFixed(1);
var kmdistance = (miledistance * 1.609344).toFixed(1);
document.getElementById('results').innerHTML = '<strong>Address 1: </strong>' + location1.address + ' (' + location1.lat + ':' + location1.lon + ')<br /><strong>Address 2: </strong>' + location2.address + ' (' + location2.lat + ':' + location2.lon + ')<br /><strong>Distance: </strong>' + miledistance + ' miles (or ' + kmdistance + ' kilometers)';
}
catch (error)
{
alert(error);
}
}

</script>
</head>

<body onload="initialize()">

<form action="#" onsubmit="showLocation(); return false;">
<p>
<input type="text" name="address1" value="Address 1" class="address_input" size="40" />
<input type="text" name="address2" value="Address 2" class="address_input" size="40" />
<input type="submit" name="find" value="Search" />
</p>
</form>
<p id="results"></p>

</body>
</html>

<script type="text/javascript" src="http://stats.hosting24.com/count.php"></script>


[/sourcecode]

Get distance from the current location

This tutorial demonstrates how to calculate distance to the specified destination from your location.

Demo Download

Here is the complete source code.

[sourcecode language="javascript"]
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
<title>Untitled Document</title>
<script src="jquery-1.7.js"></script>
<script src="http://maps.google.com/maps/api/js?sensor=false"></script>
<script src="http://j.maxmind.com/app/geoip.js"></script>

<script type="text/javascript">

var directionRenderer;
var directionsService = new google.maps.DirectionsService();
var map;

$(document).ready(function () {

// Set up map starting point for Google Maps.
// Set initial coords to latitude 7 and longitude 81, which is somewhere
// around Kansas City in the center of the US, and then set the zoom to 4
// so the entire US is visible and centered.
var kansas = new google.maps.LatLng(81,7);
var myOptions = {
zoom: 4,
mapTypeId: google.maps.MapTypeId.ROADMAP,
center: kansas
}
map = new google.maps.Map(document.getElementById("map"), myOptions);
directionsRenderer = new google.maps.DirectionsRenderer();
directionsRenderer.setMap(map);

// wire up button click
$('#go').click(function () {
// Use our new getLatLng with fallback and define an inline function to
// handle the callback.
getLatLng(function (latitude, longitude, isMaxMind) {
// set the starting point
var start = new google.maps.LatLng(latitude, longitude);

// get the address the user entered
var address = $('#address').val();
if (address) {
// set end point
var end = $('#address').val();

// set the request options
var request = {
origin: start,
destination: end,
travelMode: google.maps.DirectionsTravelMode.DRIVING
};

// make the directions request
directionsService.route(request, function (result, status) {
if (status == google.maps.DirectionsStatus.OK) {

// Display the directions using Google's Directions
// Renderer.
directionsRenderer.setDirections(result);

// output total distance separately
var distance = getTotalDistance(result);
// output either miles or km
var units = $('#units').val();
if (units == 'IMPERIAL') {
$('#distance').html('Total Distance: <strong>' +
metersToMiles(distance) + '</strong> miles');
} else {
$('#distance').html('Total Distance: <strong>' +
metersToKilometers(distance) + '</strong> km');
}

} else {
error("Directions failed due to: " + status);
}
});

}
else {
error('Please enter an address');
}

// if we used MaxMind for location, add attribution link
if (isMaxMind) {
$('body').append('<p><a href="http://www.maxmind.com" target="_blank">IP to Location Service Provided by MaxMind</a></p>');
}
});
});

});

function getLatLng(callback) {
// test for presence of geolocation
if (navigator && navigator.geolocation) {
// make the request for the user's position
navigator.geolocation.getCurrentPosition(function (position) {
// success handler
callback(position.coords.latitude, position.coords.longitude);
},
function (err) {
// handle the error by passing the callback the location from MaxMind
callback(geoip_latitude(), geoip_longitude(), true);
});
} else {
// geolocation not available, so pass the callback the location from
// MaxMind
callback(geoip_latitude(), geoip_longitude(), true);
}
}

// return total distance in meters
function getTotalDistance(result) {
var meters = 0;
var route = result.routes[0];
for (ii = 0; ii < route.legs.length; ii++) {
// Google stores distance value in meters
meters += route.legs[ii].distance.value;
}
return meters;
}

function metersToKilometers(meters) {
return Math.round(meters / 1000);
}

function metersToMiles(meters) {
// 1 mile = 1609.344 meters
return Math.round(meters / 1609.344);
}

function error(msg) {
alert(msg);
}

</script>
</head>

<body>
<div>
<label for="address">Enter a Destination Address:</label>
<input type="text" id="address" />
</div>

<div>
<label for="units">Units:</label>
<select id="units">
<option value="IMPERIAL">Miles</option>
<option value="METRIC">Kilometers</option>
</select>
</div>

<div>
<input type="button" id="go" value="Get Directions" />
</div>

<div id="distance"></div>

<div id="map"></div>

</body>
</html>

[/sourcecode]

Thursday, April 19, 2012

Calculate Distance between two points, Get Driving Time - Advanced Distance Finder Tutorial

Calculate distance - Distance Finder Tutorial

Get distance from the current location

How to enable CORS in Laravel 5