I'm working on a project that locates coffee shops near the user's location (which is retrieved via the browser). I'm using Google Maps API with the geolocation.
My idea is to locate the users location via geolocation and then retrieve cafes nearby their location.
I can't seem to figure out how to add coffee shops or auto search and display coffee shops on the map nearby the user once the location is retrieved by the browser.
Hardcoding the locations in just doesn't seem like the solution but I was hoping to get some advice from more experienced programmers on how I could do this.
At the moment, the code for the map is taken from Google Maps documentation as it provides the functionality I need other than the searching.
I've pasted it below.
function mapFunc() {
// referenced from google maps api documentation
var map;
var infoWindow;
function initMap() {
map = new google.maps.Map(document.getElementById('map'), {
center: {
lat: -34.397,
lng: 150.644
},
zoom: 15
});
infoWindow = new google.maps.InfoWindow;
//HTML5 geolocation.
if (navigator.geolocation) {
navigator.geolocation.getCurrentPosition(function (position) {
var pos = {
lat: position.coords.latitude,
lng: position.coords.longitude
};
infoWindow.setPosition(pos);
infoWindow.setContent('You are here!');
infoWindow.open(map);
map.setCenter(pos);
}, function () {
handleLocationError(true, infoWindow, map.getCenter());
search();
});
} else {
// Browser doesn't support Geolocation
handleLocationError(false, infoWindow, map.getCenter());
}
}
function handleLocationError(browserHasGeolocation, infoWindow, pos) {
infoWindow.setPosition(pos);
infoWindow.setContent(browserHasGeolocation ?
'Error: The Geolocation service failed.' :
'Error: Your browser doesn\'t support geolocation.');
infoWindow.open(map);
}
//get coffee shops nearby??
}
mapFunc();
You need to use the places library in of Google Map api.
Include it in in tag as below
<script type="text/javascript" src="https://maps.googleapis.com/maps/api/js?key=YOUR_API_KEY&libraries=places"></script>
Then use something like the sample code below:
var map;
var service;
var infowindow;
function initialize() {
//replace the lat long with results from your geocoding function
var pyrmont = new google.maps.LatLng(-33.8665433,151.1956316);
map = new google.maps.Map(document.getElementById('map'), {
center: pyrmont,
zoom: 15
});
var request = {
location: pyrmont,
radius: '500', //radius in metres
type: ['coffee shops']
};
service = new google.maps.places.PlacesService(map);
service.nearbySearch(request, callback);
}
function callback(results, status) {
if (status == google.maps.places.PlacesServiceStatus.OK) {
for (var i = 0; i < results.length; i++) {
createMarker(results[i]);
}
}
}
see details in https://developers.google.com/maps/documentation/javascript/places#place_search_requests
Related
I'm working on a form where I want the user to enter their current location using the GPS location in google maps. I've read the Google Maps API documentation but I'm still a bit lost on how to integrate it all. I would appreciate any help, JS is still pretty new to me and it hasn't been easy to learn.
This is the code I used from Google Maps API.
var map, infoWindow;
function initMap() {
map = new google.maps.Map(document.getElementById('map'), {
center: {lat: 18.2208, lng: -66.5901},
zoom: 7,
});
infoWindow = new google.maps.InfoWindow;
// Try HTML5 geolocation.
if (navigator.geolocation) {
navigator.geolocation.getCurrentPosition(function(position) {
var pos = {
lat: position.coords.latitude,
lng: position.coords.longitude
};
infoWindow.setPosition(pos);
infoWindow.setContent('Localización encontrada.');
infoWindow.open(map);
map.setCenter(pos);
}, function() {
handleLocationError(true, infoWindow, map.getCenter());
});
} else {
// Browser doesn't support Geolocation
handleLocationError(false, infoWindow, map.getCenter());
}
}
function handleLocationError(browserHasGeolocation, infoWindow, pos) {
infoWindow.setPosition(pos);
infoWindow.setContent(browserHasGeolocation ?
'Error: The Geolocation service failed.' :
'Error: Your browser doesn\'t support geolocation.');
infoWindow.open(map);
}
</script>
<script async defer
src="https://maps.googleapis.com/maps/api/js?key=AIzaSyAwnKnBH4qxyjHYkg3QlJP46-yG_o4QkSc&callback=initMap">
</script>
Its kind of hard to answer your question since we are missing some information. Is the Google maps imported in your project with the geolocation API? You can create an account and generate a key on https://console.cloud.google.com
After that, you'll need to call the initMap() after the page is done loading by adding the following code at the end of your Javascript.
(function(){
initMap();
}());
From there, you can now get the value of the coordinates inside your initMap function and add them wherever you need them calling pos.lat and pos.lng.
infoWindow.setContent(pos.lat+' / '+pos.lng);
https://jsfiddle.net/SohRonery/q69ra78v/6/
I am trying to develop a web application which allows the user to post notes (markers) on the map for others to read. It is basically placing markers on the map that consist of the subject and the message. It is accessed by clicking on a marker on the map.
Right now I am facing an issue with regards of retrieving the data from Firebase. I managed to make the application send data to Firebase (latitude and longitude for marker location on the map, and the message with the subject itself), but I am unable to take the information back in order to place a marker on the exact coordinates.
I followed many YouTube tutorials and online guides but the Firebase data won't show anywhere except for the console in Chrome.
Any clue what could be the issue? I am posting the JavaScript for he map and Firebase below so you can see how I saved message, subject, latitude and longitude to Firebase database.
Thanks
firebase.initializeApp(config);
var note = firebase.database().ref("note");
/*map*/
window.onload = getLocation;
var geo = navigator.geolocation;
function getLocation() {
if (geo) {
geo.watchPosition(displayLocation);
}
else {
alert("opps, geolocation API is not supported ");
}
}
function displayLocation(position) {
var latitude = position.coords.latitude;
var longitude = position.coords.longitude;
/*diaplays coordinates in the footer of the webapp*/
var div = document.getElementById( 'location' );
longText = document.getElementById("longitude")
if (latitude == latitude)
{
div.innerHTML = "X: " + latitude + " Y: " + longitude;
}
}
/*map*/
var map, infoWindow;
function initMap() {
map = new google.maps.Map(document.getElementById('map'), {
center: {lat: -34.397, lng: 150.644},
zoom: 6,
disableDefaultUI: true,
});
infoWindow = new google.maps.InfoWindow;
/*gets Navigation, sets the map to current position and posts a marker*/
/*Shouldn't post a marker, code will be removed later when we learn how
to post markers to note locations rather than user locations*/
if (navigator.geolocation) {
navigator.geolocation.getCurrentPosition(function(position) {
var pos = {
lat: position.coords.latitude,
lng: position.coords.longitude,
};
infoWindow.setPosition(pos);
infoWindow.setContent('Location found.');
infoWindow.open(map);
map.setCenter(pos);
})
var marker = new google.maps.Marker
({
position: pos,
map: map
})
}, function() {
handleLocationError(true, infoWindow, map.getCenter());
});
} else {
handleLocationError(false, infoWindow, map.getCenter());
}
}
/*stores Geolocation in local storage to call it later*/
navigator.geolocation.getCurrentPosition(function(p)
{
localStorage.setItem("latitude", p.coords.latitude);
localStorage.setItem("longitude", p.coords.longitude);
}, function(e){console.log(e)})
/*error handler obviously*/
function handleLocationError(browserHasGeolocation, infoWindow, pos) {
infoWindow.setPosition(pos);
infoWindow.setContent(browserHasGeolocation ?
'Error: The Geolocation service failed.' :
'Error: Your browser doesn\'t support geolocation.');
infoWindow.open(map);
}
/*button firebase function*/
var submitNote = function () {
var subject = $("#messageSubject").val();
var message = $("#messageContent").val();
var lat = localStorage.latitude;
var lon = localStorage.longitude;
note.push({
"subject": subject,
"message": message,
"latitude": lat,
"longitude": lon
});
};
$(window).load(function () {
$("#noteForm").submit(submitNote);
});
To retrieve the latitude and longitude from the database:
firebase.database().ref().child("markers").on('value').then(function(snapshot) {
snapshot.forEach(function(child) {
var childData = child.val();
var latitudes=child.val().latitude;
var longitudes=child.val().longitude;
});
});
Assuming the database is like this:
markers
pushid
subject: subject
message: message
latitude: lat
longitude: lon
I am fairly new to Google Maps API and not very experienced in JS. I've got some questions on geolocations. What I am trying to achieve: a user's current geolocation should be saved onclick, displayed on map and stored on clientside, so that it can be navigated to in later steps. The code below in its current state shows the geolocation of a user in an (InfoWindow) as the map is rendered for the first time.
Any hints on how to achieve what I am planning to do?
function initMap() {
var map = new google.maps.Map(document.getElementById('map'), {
center: {lat: -34.397, lng: 150.644},
zoom: 18
});
var infoWindow = new google.maps.InfoWindow({map: map});
// Geolocation in HTML
if (navigator.geolocation) {
navigator.geolocation.getCurrentPosition(function(position) {
var pos = {
lat: position.coords.latitude,
lng: position.coords.longitude
};
infoWindow.setPosition(pos);
infoWindow.setContent('You are here!');
map.setCenter(pos);
}, function() {
handleLocationError(true, infoWindow, map.getCenter());
});
} else {
// Browser doesn't support Geolocation
handleLocationError(false, infoWindow, map.getCenter());
}
}
function handleLocationError(browserHasGeolocation, infoWindow, pos) {
infoWindow.setPosition(pos);
infoWindow.setContent(browserHasGeolocation ?
'Error: The Geolocation service failed.' :
'Error: Your browser doesn\'t support geolocation.');
}
I am trying to show on one map user's current location and other users markers whose locations I get from ajax post.
In other words I am trying to combine this
https://developers.google.com/maps/documentation/javascript/examples/map-geolocation
with this
http://en.marnoto.com/2013/12/mapa-com-varios-marcadores-google-maps.html
or even the simpler version
Google Maps JS API v3 - Simple Multiple Marker Example
but I don't know how to implement my data that I get from ajax. In order to get the information from ajax I have to pass the latitude and longitude so that I can get the users that are in 1km radius and who were logged in in the past 5 minutes. I have written the query, and my api is correct,I have checked that part, but I don't know how to combine the two codes in order to get one map with user's current location and other users markers.
this is my index.html file
<head>
<meta name="viewport" content="initial-scale=1.0, user-scalable=no">
<meta charset="utf-8">
<title>Geolocation</title>
<script src="location.js"></script>
</head><body>
<div id="map"></div>
<p id="geolocation"></p>
<script>
function initMap() {
var map = new google.maps.Map(document.getElementById('map'), {
center: {lat: 45.38361, lng: 20.38194},
zoomControl:true,
zoom: 15
});
var infoWindow = new google.maps.InfoWindow({map: map});
// Try HTML5 geolocation.
if (navigator.geolocation) {
navigator.geolocation.getCurrentPosition(function (position) {
var pos = {
lat: position.coords.latitude,
lng: position.coords.longitude
};
infoWindow.setPosition(pos);
infoWindow.setContent('You are here.');
map.setCenter(pos);
}, function () {
handleLocationError(true, infoWindow, map.getCenter());
});
} else {
// Browser doesn't support Geolocation
handleLocationError(false, infoWindow, map.getCenter());
}
}
function handleLocationError(browserHasGeolocation, infoWindow, pos) {
infoWindow.setPosition(pos);
infoWindow.setContent(browserHasGeolocation ?
'Error: The Geolocation service failed.' :
'Error: Your browser doesn\'t support geolocation.');
}
</script>
<script async defer
src="https://maps.googleapis.com/maps/api/js?key=myKey&callback=initMap">
</script>
</body>
and this is my location.js file
document.addEventListener("deviceready", onDeviceReady, false);
function onDeviceReady() {
navigator.geolocation.getCurrentPosition(onSuccess, onError);
}
function onSuccess(position) {
var element = document.getElementById('geolocation');
console.log(position.coords.latitude);
console.log(position.coords.longitude);
//here is where I write in the db user's current location
$.post("url/location", {username: localStorage.getItem("username"), latitude: position.coords.latitude, longitude: position.coords.longitude});
//here is where I get other users locations based on user's current one and in the radius of 1km
$.post("url/getUsers", {latitude: position.coords.latitude, longitude: position.coords.longitude})
.done(function (data) {
$(data).each(function (index, value) {
//here I am writing in the console the data that I receive back from the ajax call, and I presume that I should make my markers here
console.log(value.username + ' ' + value.latitude + ' ' + value.longitude);
});
});
}
function onError(error) {
alert('code: ' + error.code + '\n' +
'message: ' + error.message + '\n');
}
for (i = 0; i < jsonArray.locations.length; i++)
{
var counter = jsonArray.locations[i];
var infowindow = new google.maps.InfoWindow();
marker = new google.maps.Marker({
position: new google.maps.LatLng(counter['lat'], counter['lon']),
map: map,
icon:'http://chart.apis.google.com/chart?chst=d_map_pin_letter&chld='+i+'|FF0000|000000'
});
}
I am using the following script on my site:
<script type="text/javascript">
var map;
function initialize() {
var mapOptions = {
zoom: 10,
mapTypeId: google.maps.MapTypeId.ROADMAP
};
map = new google.maps.Map(document.getElementById('map_canvas'),
mapOptions);
var kmlLayer = new google.maps.KmlLayer("https://maps.google.ca/maps/ms?ie=UTF8&msa=0&output=kml&msid=210000746142049190989.0004ce14b7a8e95167602");
kmlLayer.setMap(map);
// Try HTML5 geolocation
if(navigator.geolocation) {
navigator.geolocation.getCurrentPosition(function(position) {
var pos = new google.maps.LatLng(position.coords.latitude,
position.coords.longitude);
var infowindow = new google.maps.InfoWindow({
map: map,
position: pos,
content: 'Location found using HTML5.'
});
map.setZoom(14);
map.setCenter(pos);
}, function() {
handleNoGeolocation(true);
});
} else {
// Browser doesn't support Geolocation
handleNoGeolocation(false);
}
}
function handleNoGeolocation(errorFlag) {
if (errorFlag) {
var content = 'Error: The Geolocation service failed.';
} else {
var content = 'Error: Your browser doesn\'t support geolocation.';
}
var options = {
map: map,
position: new google.maps.LatLng(60, 105),
content: errorFlag
};
var infowindow = new google.maps.InfoWindow(options);
map.setCenter(options.position);
}
google.maps.event.addDomListener(window, 'load', initialize);
</script>
I am also using the following which is needed for mobile
<script type="text/javascript" src="http://maps.googleapis.com/maps/api/js?sensor=true"></script>
But still when I visit the site on mobile, and I click to view the map I get the error "The Geolocation service failed."
Is there somthing else I am missing for the geo-location to work on mobile?
You can see the site and live example here on the site, right hand side if you scroll down just past the fold you will see "where can I get rumble?" click on that for the map.
EDIT I think it has somthing to do with the kmlLayer it seems to be defaulting to that on mobile?
var kmlLayer = new google.maps.KmlLayer("https://maps.google.ca/maps/ms?ie=UTF8&msa=0&output=kml&msid=210000746142049190989.0004ce14b7a8e95167602");
kmlLayer.setMap(map);
According to Google Maps zoom gets overridden, when using a kml file
in the function initialize, replace all you have before // Try HTML5 geolocation with:
var mapOptions = {
zoom: 8,
mapTypeId: google.maps.MapTypeId.ROADMAP
};
var map = new google.maps.Map(document.getElementById('map_canvas'), mapOptions);
var kmlLayer = new google.maps.KmlLayer("https://maps.google.ca/maps/ms?ie=UTF8&msa=0&output=kml&msid=210000746142049190989.0004ce14b7a8e95167602", { map: map, preserveViewport: true });