HTML 5 Issues with showing google map - javascript

I have been looking at the google maps html5/javascript code and am attempting to make a app which finds someone current location through longitude and latitude then geo reverses it to give then their address. However when i run the code it just gives a blank screen. I am really new to html5 and if anyone could point to me what i am doing wrong i would be really grateful.

the error is geocoder = new google.maps.Geocoder(): must be geocoder = new google.maps.Geocoder();

By default, navigator.geolocation.getCurrentPosition() has a timeout value of infinite. In the getCurrentPosition's options parameter, specify a timeout value and I think you will find that is where your error lies.
... }, function() {
handleNoGeolocation(true);
}, { timeout: 4000 });

Related

Sorry, we have no imagery here - Google Satellite Map

I am using Google Satellite map on an application. It was working fine and suddenly the map images start not showing. Instead of the terrain images, the map is showing the message "Sorry, we have no imagery here".
It is happening on my office IP and other testers' IPs. If I access from another IP or mobile data it works and shown the satellite images. I am not sure if google blocks IPs in case of continuous access on the maps.
Also I am able to see a lot of errors accessing the images
While clicking on the links for loading images, I am getting an error page like below instead of the map tile image.
Any clues on this issue is appreciated
To avoid showing these errors, in case they are due to the use of a zoom level that is too high for the area you are viewing, you can use the MaxZoomService. Kindly note that the below code snippet doesn't work because apparently access to the service without an API key is not possible.
Copy the code and test it with a working API key.
var map, maxZoomService;
function initialize() {
maxZoomService = new google.maps.MaxZoomService();
var myLatLng = new google.maps.LatLng(0, 0);
var mapOptions = {
zoom: 15,
center: myLatLng,
mapTypeId: google.maps.MapTypeId.SATELLITE
};
map = new google.maps.Map(document.getElementById("map-canvas"), mapOptions);
var marker = new google.maps.Marker({
position: myLatLng,
map: map
});
google.maps.event.addListenerOnce(map, 'idle', function() {
checkZoom();
});
google.maps.event.addListener(map, 'zoom_changed', function() {
checkZoom();
});
}
function checkZoom() {
let zoom = map.getZoom();
maxZoomService.getMaxZoomAtLatLng(map.getCenter(), function(response) {
if (response.status !== 'OK') {
alert('maxZoomService error: ' + response.status);
document.getElementById('max-zoom').innerHTML = 'n/a';
document.getElementById('max-zoom-service').innerHTML = response.status;
} else {
if (response.zoom < zoom) {
map.setZoom(response.zoom);
document.getElementById('max-zoom').innerHTML = response.zoom;
document.getElementById('max-zoom-service').innerHTML = response.status;
}
}
document.getElementById('curr-zoom').innerHTML = map.getZoom();
});
}
initialize();
#map-canvas {
height: 130px;
}
span {
font-weight: bold;
}
<div id="map-canvas"></div>
Current Zoom Level: <span id="curr-zoom"></span><br>
Max Zoom Level: <span id="max-zoom"></span><br>
Max Zoom Service Status: <span id="max-zoom-service"></span>
<script src="https://maps.googleapis.com/maps/api/js?key=AIzaSyCkUOdZ5y7hMm0yrcCQoCvLwzdM6M8s5qk"></script>
If the zoom level is not the issue, make sure that you are using a valid API key. In any case, it might be worth creating a new key and trying again with that one. If that still doesn't work, I would try to contact Google directly with more information as it might be that your network IP or IP range was banned by Google for some reason.
I know this is an old question but, I recently got this error too. So, the problem, in my case was the version of the API script I was using.
I'm answering this because I didn't found this solution over here, so, just in case someone was getting the same error.
Just adding v=3.35 (version number) to the url and it works.
Example: https://maps.googleapis.com/maps/api/js?v=3.35&key=API_KEY...
They explain here:
https://developers.google.com/maps/documentation/javascript/versions#an-update-affected-my-application
Thank you for all the response and I was able to find and fix the real issue. Adding the details here for reference.
I have contacted Google support with the request details and they were able to figure out the exact problem. The reason is their image servers are blocking the request from this project (hybrid mobile project - Android) since it found out that there are invalid request is also coming from the project. The invalid request is referred to as the requests without proper header information.
Based on that information, I could find out that a caching mechanism in the project was trying to cache the images and that is which sends the invalid requests. Adding proper header to that cache mechanism solved the issue forever.

html geolocation: Unknown error acquiring position

I am trying to use HTML geolocation to get my position. Funny thing is, it was working brilliantly until some seemingly random point in the day when it just stopped working. Now all I get is the error callback with a message:
Unknown error acquiring position
This happened on the day I first started to develop the app. It is a web app built in Node/Express. The browser I am using is Firefox v53 64-bit.
Location is allowed, and I have also tried a fix that I found online which involves going to about:config and changing geo.wifi.uri from:
https://www.googleapis.com/geolocation/v1/geolocate?key=%GOOGLE_API_KEY%
to
https://www.googleapis.com/geolocation/v1/geolocate?key=test
This did not work for me.
This does however work on my phones Firefox app, but not the Google Chrome app.
Heres an example code snippet:
const geo = navigator.geolocation;
geo.getCurrentPosition(success, failure);
function success(position) {
lat = position.coords.latitude;
lng = position.coords.longitude;
$('#coords').val(lat + ',' + lng);
mapView.setCenter(ol.proj.fromLonLat([lng, lat]));
}
function failure(error) {
console.log(error.message);
}
The full page: https://github.com/ThriceGood/Spots/blob/master/views/index.html
Can anyone shed some light on this issue?
What worked for me was changing geo.wifi.uri to:
https://location.services.mozilla.com/v1/geolocate?key=test
As per this page: navigator.geolocation.getCurrentPosition do not work in Firefox 30.0

Geolocation doesn't work with cordova

I'm currently working on a mobile application with Intel XDK (In background it's Cordova finally, that's why I put Cordova in title.)
With an Ajax request, I get some adresses and with these adresses I want to calculate the distance between them and the current position of user.
So, I get adresses, I convert them and I make the difference.
But actually, nothing is working !
function codeAddress(id, addresse) {
geocoder.geocode( { 'address': addresse}, function(results, status) {
if (status == google.maps.GeocoderStatus.OVER_QUERY_LIMIT) {
setTimeout(function(){}, 100);
}
console.log(id);
console.log(addresse);
//document.addEventListener("intel.xdk.device.ready",function(){
if (navigator.geolocation)
{
if (status == google.maps.GeocoderStatus.OK)
{
navigator.geolocation.getCurrentPosition(function(position) {
addressEvent = results[0].geometry.location;
var pos = {
lat: position.coords.latitude,
lng: position.coords.longitude
};
var position = new google.maps.LatLng(pos.lat, pos.lng)
var resultat = google.maps.geometry.spherical.computeDistanceBetween(addressEvent, position);
console.log(resultat);
console.log(addressEvent);
console.log(pos);
console.log(position);
var convert = Math.floor(resultat);
var finalConvert = convert + " m";
var distance = document.createElement('span');
distance.innerHTML = finalConvert;
distance.className = "geo";
document.getElementsByClassName('meta-info-geo')[id].appendChild(distance);
}, function() {
handleLocationError(true, infoWindow);
});
}
}
//},false);
});
}
In the console.log(id), console.log(addresse), I HAVE results !
Actually i'm getting 4 IDs and 4 adresses.
I checked on all the topics I could find on StackOverFlow, and I had normally to add the line in // with the addEventListener but it changes nothing.
Is there someone who knows how to change that ?
ps : Of course, cordova geoloc is in the build and permissions are granted !
EDIT : I'm targeting Android 4.0 min and iOS 5.1.1. I'm using SDK.
EDIT 2 :
Geolocation frequently does not work the way people expect it to work, for a variety of reasons that have been expressed here and here.
You can experiment with geo by using the "Hello, Cordova" sample app that is in the XDK and also available on GitHub. Try using it on a variety of devices to see how things work. Push the "fine" button to initiate a single geo call for a "fine" location and push the "coarse" button to initiate a single geo call for a "coarse" location. Push the "watch" button to initiate a request for a series of geo data points (set to coarse or fine by pushing one of the single buttons first).
The behavior you get in the Emulate tab will be dramatically different than what you get on a real device. The type of device (Android, iOS, etc.) and the version of that device will influence your results; the manufacturer of the device and your location (inside or outside) will influence your results. Do not assume that making a call to the geo APIs will always give you immediate and reliable data, geolocation hardware does not work that way... In fact, you cannot assume that you can even get a valid result! See the two links I pointed to earlier in the post for some reasons why.

Geolocation with Google Map V3

I would like to add geolocation to the mobile version of my
map located at http://alert.fcd.maricopa.gov/alert/Google/v3/mobile.html.
My map loads through this JavaScript file
http://alert.fcd.maricopa.gov/alert/Google/v3/js/mobilemap_v3.js. You
will notice that line 46 of this file is -
map = new google.maps.Map($('#map_canvas')[0],myOptions);
I have tried the Geolocation example at https://developers.google.com/maps/documentation/javascript/examples/map-geolocation and the W3 HTML5 Geolocation method at http://www.w3schools.com/html/html5_geolocation.asp. But my map loads through jquery and doesn’t use
map = new google.maps.Map(document.getElementById('map-canvas'),
mapOptions);
like all the examples.
I can get the geolocation to work if I replace the $ in line 46 with
document.getElementById but then none of my sensors/makers will
display.
Does anyone know how I could get the geolocation working with my
markers/data still loading?
Found an answer to this! I used geolocationmarker-compiled.js (at http://code.google.com/p/google-maps-utility-library-v3/source/browse/trunk/geolocationmarker/src/geolocationmarker-compiled.js?r=379) and then added
var GeoMarker;
GeoMarker = new GeolocationMarker();
GeoMarker.setCircleOptions({
fillColor: '#808080'});
google.maps.event.addListenerOnce(GeoMarker, 'position_changed', function() {
map.setCenter(this.getPosition());
map.fitBounds(this.getBounds());
});
google.maps.event.addListener(GeoMarker, 'geolocation_error', function(e) {
alert('There was an error obtaining your position. Message: ' + e.message);
});
GeoMarker.setMap(map);
and it works great. Mobile map with Geolocation working is located at http://alert.fcd.maricopa.gov/alert/Google/v3/mobile.html and the geolocation code in in the mobilemap_v3.js file if anyone is looking to do the same thing.

Google maps api v3, defining user current location

function onPositionUpdate(position) {
var lat = position.coords.latitude;
var lng = position.coords.longitude;
var markerPoint = new google.maps.LatLng(lat, lng);
var marker = new google.maps.Marker({
position: markerPoint,
map: map,
title: 'Your Location'
});
}
function button_clicked() {
if (navigator.geolocation)
navigator.geolocation.getCurrentPosition(onPositionUpdate);
else
alert("navigator.geolocation is not available");
}
This code is running correctly and shows user location. when I try this at home this shows correct address but when I try this at another location this code doesn't show correct address. why? I dont know how this code run exactly(does this code define for IP or other information)
You can check if another program can find you. If not, it might be that its not your code which is incorrect:
http://html5demos.com/geo
Some security measures might cause that the client won't share location informations automatically.
Have you tried :
navigator.geolocation.getCurrentPosition(onPositionUpdate() );
Not sure if your callback has to have brackets or not. It's something I would try.
I also noticed that geolocation takes a little while to narrow down the approximation to a smaller radius. Might have to call position update.

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