I'm building an application where users provide the addresses for their listings. It's certainly not practical to ask a simple user to provide the latitude and longitude for each address he provides!
Can I provide addresses to Google Maps API instead? If so, how?
Thanks.
Yes of course. That can be done very easily, using the Geocoding Services provided by the Google Maps JavaScript API. Consider the following example:
<!DOCTYPE html>
<html>
<head>
<meta http-equiv="content-type" content="text/html; charset=UTF-8"/>
<title>Google Maps Geocoding Demo 1</title>
<script src="http://maps.google.com/maps/api/js?sensor=false"
type="text/javascript"></script>
</head>
<body>
<div id="map" style="width: 400px; height: 300px;"></div>
<script type="text/javascript">
var address = 'London, UK';
var map = new google.maps.Map(document.getElementById('map'), {
mapTypeId: google.maps.MapTypeId.TERRAIN,
zoom: 6
});
var geocoder = new google.maps.Geocoder();
geocoder.geocode({
'address': address
},
function(results, status) {
if(status == google.maps.GeocoderStatus.OK) {
new google.maps.Marker({
position: results[0].geometry.location,
map: map
});
map.setCenter(results[0].geometry.location);
}
});
</script>
</body>
</html>
Screenshot:
You can simply substitute 'London, UK' from the address variable to any location that supports geocoding in Google Maps.
Could be refined if you provide the address with the format :
var address = '# Street, City';
var address = '127 Ledbury Rd, Notting Hill, London';
Related
I want to implement a feature where people will be able to change their location. For that I want to use google places api. Now what I want is a search box and when someone inputs a town/place it will search google places and come up with results. Once location is choosen it will give me lat and lng of that place. Is that possible to do without the map?
thanks
You can use the Google Maps Places Autocomplete to get an accurate address, and then after you successfully get an address you can geocode it to get the lat and lng.
Like this:
function codeAddress(address) {
geocoder.geocode({ 'address': address}, function(results, status) {
if (status == 'OK') {
alert(results[0].geometry.location); // This is the lat and lng
} else {
alert('Geocode was not successful for the following reason: ' + status);
}
});
}
Check this working example: https://jsbin.com/pejagub/edit?html,js,output
I also inserted here the code snippet incase the jsbin is not working
var placeSearch, autocomplete, geocoder;
function initAutocomplete() {
geocoder = new google.maps.Geocoder();
autocomplete = new google.maps.places.Autocomplete(
(document.getElementById('autocomplete')), {
types: ['geocode']
});
autocomplete.addListener('place_changed', fillInAddress);
}
function codeAddress(address) {
geocoder.geocode({
'address': address
}, function(results, status) {
if (status == 'OK') {
// This is the lat and lng results[0].geometry.location
alert(results[0].geometry.location);
} else {
alert('Geocode was not successful for the following reason: ' + status);
}
});
}
function fillInAddress() {
var place = autocomplete.getPlace();
codeAddress(document.getElementById('autocomplete').value);
}
#autocomplete {
width: 100%;
}
<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8">
<meta name="viewport" content="width=device-width">
<title>JS Bin</title>
</head>
<body>
<div id="locationField">
<input id="autocomplete" placeholder="Enter your address" type="text" />
</div>
<script src="https://maps.googleapis.com/maps/api/js?key=AIzaSyCKQX3cyZ7pVKmBwE8wiowivW9qH62AVk8&libraries=places&callback=initAutocomplete" async defer></script>
</body>
</html>
Sorry for being late. You may find your answer here:
https://developers.google.com/maps/documentation/javascript/places-autocomplete#video
```
var defaultBounds = new google.maps.LatLngBounds(
new google.maps.LatLng(-33.8902, 151.1759),
new google.maps.LatLng(-33.8474, 151.2631));
var input = document.getElementById('searchTextField');
var searchBox = new google.maps.places.SearchBox(input, {
bounds: defaultBounds
});
```
No need for map object reference just pass the bounds.
I try to make the tutorial work that geoserver has in its documentation:
http://docs.geoserver.org/stable/en/user/tutorials/georss/georss.html
Since Google maps v2 is deprecated and its keys with it I obtained a v3 API-key via the Google web console and put it in that like this:
<script src="http://maps.google.com/maps?file=api&v=3.x&key=[my key for v3 here]" type="text/javascript"></script>
It shows the map as expected but after a few seconds I get:
Google has disabled use of the Maps API for this application.
and the map is gone.
Could it be, that this tutorial is just severely outdated? So do I need to find a tutorial on using geoserver with Google Maps v3 ?
The way to display RSS layers in the Google Maps API v3 is to use KmlLayer
Example from the referenced documentation:
<!DOCTYPE html>
<html>
<head>
<meta name="viewport" content="initial-scale=1.0, user-scalable=no">
<meta charset="utf-8">
<title>GeoRSS Layers</title>
<style>
html, body, #map-canvas {
height: 100%;
margin: 0px;
padding: 0px
}
</style>
<script src="https://maps.googleapis.com/maps/api/js?v=3.exp&sensor=false"></script>
<script>
function initialize() {
var myLatlng = new google.maps.LatLng(49.496675,-102.65625);
var mapOptions = {
zoom: 4,
center: myLatlng,
mapTypeId: google.maps.MapTypeId.ROADMAP
}
var map = new google.maps.Map(document.getElementById('map-canvas'), mapOptions);
var georssLayer = new google.maps.KmlLayer({
url: 'http://api.flickr.com/services/feeds/geo/?g=322338#N20&lang=en-us&format=feed-georss'
});
georssLayer.setMap(map);
}
google.maps.event.addDomListener(window, 'load', initialize);
</script>
</head>
<body>
<div id="map-canvas"></div>
</body>
</html>
So if I have a general GPS Lat/Lng point, would it be possible to say, yes this point is in a building, or this point is on a road which a car could travel on?
I do not think you can determine if a point is a road or a building purely with Google Maps data. To do this I think you would need some additional data source.
However, you may be able to determine if a point is a road by using the Snap point to street technique.
I have re-written the technique to use Google Maps API v3 and added the Haversine function to tell you the distance (in km) between the original clicked point and the corresponding point in the nearest street.
<!DOCTYPE html>
<html>
<head>
<meta name="viewport" content="initial-scale=1.0, user-scalable=no"/>
<meta http-equiv="content-type" content="text/html; charset=UTF-8"/>
<title>Google Maps JavaScript API v3 Example: Directions Simple</title>
<link href="http://code.google.com/apis/maps/documentation/javascript/examples/default.css" rel="stylesheet" type="text/css" />
<script type="text/javascript" src="http://maps.google.com/maps/api/js?sensor=false"></script>
<script type="text/javascript">
rad = function(x) {return x*Math.PI/180;}
distHaversine = function(p1, p2) {
var R = 6371; // earth's mean radius in km
var dLat = rad(p2.lat() - p1.lat());
var dLong = rad(p2.lng() - p1.lng());
var a = Math.sin(dLat/2) * Math.sin(dLat/2) +
Math.cos(rad(p1.lat())) * Math.cos(rad(p2.lat())) * Math.sin(dLong/2) * Math.sin(dLong/2);
var c = 2 * Math.atan2(Math.sqrt(a), Math.sqrt(1-a));
var d = R * c;
return d.toFixed(3);
}
var dirn = new google.maps.DirectionsService();
var map;
function initialize() {
var center = new google.maps.LatLng(53.7877, -2.9832);
var myOptions = {
zoom:15,
mapTypeId: google.maps.MapTypeId.ROADMAP,
center: center
}
map = new google.maps.Map(document.getElementById("map_canvas"), myOptions);
google.maps.event.addListener(map, "click", function(event) {
// == When the user clicks on a the map, get directiobns from that point to itself ==
var request = {
origin: event.latLng,
destination: event.latLng,
travelMode: google.maps.DirectionsTravelMode.DRIVING
};
dirn.route(request, function(response, status) {
if (status == google.maps.DirectionsStatus.OK) {
if(response.routes && response.routes.length > 0){
route = response.routes[0];
if(route.overview_path && route.overview_path.length > 0){
pos = route.overview_path[0];
new google.maps.Marker({
position: pos,
map: map
});
alert(distHaversine(request.origin, pos));
}
}
}
});
});
}
</script>
</head>
<body onload="initialize()">
<div id="map_canvas"></div>
</body>
</html>
I hope this is helpful.
Best place to ask is https://gis.stackexchange.com/. Isn't it possible to figure out the road location from the layer which contains the roads? You'll be given the lat-long's of all road nodes. Unless it's a curved line, you can find if your lat-long point lies on the road line. To convert lat-long to cartesian, follow the link.
I have some data about place,road, city.
And I want to search the map by entering these values.
Now I have script that generate latitude and longitude using geocoding.
But I wonder if there is a way to generate google map code (iframe) by geocoding?
Could you please tell me the way or give me some links?
The following example may help you getting started. All you would need to do is to change the JavaScript variable userLocation with the place, road and city chosen by your users:
<!DOCTYPE html>
<html>
<head>
<meta http-equiv="content-type" content="text/html; charset=UTF-8"/>
<title>Google Maps API Demo</title>
<script src="http://maps.google.com/maps?file=api&v=2&sensor=false"
type="text/javascript"></script>
</head>
<body onunload="GUnload()">
<div id="map_canvas" style="width: 400px; height: 300px"></div>
<script type="text/javascript">
var userLocation = 'London, UK';
if (GBrowserIsCompatible()) {
var geocoder = new GClientGeocoder();
geocoder.getLocations(userLocation, function (locations) {
if (locations.Placemark) {
var north = locations.Placemark[0].ExtendedData.LatLonBox.north;
var south = locations.Placemark[0].ExtendedData.LatLonBox.south;
var east = locations.Placemark[0].ExtendedData.LatLonBox.east;
var west = locations.Placemark[0].ExtendedData.LatLonBox.west;
var bounds = new GLatLngBounds(new GLatLng(south, west),
new GLatLng(north, east));
var map = new GMap2(document.getElementById("map_canvas"));
map.setCenter(bounds.getCenter(), map.getBoundsZoomLevel(bounds));
map.addOverlay(new GMarker(bounds.getCenter()));
}
});
}
</script>
</body>
</html>
I have a PHP-variable called $go_Adress which contains the adress I need to get a map and a street view from. How do I do that? I have created an api-key but else I don't know how to do it!
Hope you can help.
I have just answered another question on Google Maps, and I think I can use the same example here.
The following example may help you getting started. All you would need to do is to change the JavaScript variable userLocation with the address you have in your php variable.
<!DOCTYPE html>
<html>
<head>
<meta http-equiv="content-type" content="text/html; charset=UTF-8"/>
<title>Google Maps API Demo</title>
<script src="http://maps.google.com/maps?file=api&v=2&sensor=false"
type="text/javascript"></script>
</head>
<body onunload="GUnload()">
<div id="map_canvas" style="width: 400px; height: 300px"></div>
<script type="text/javascript">
var userLocation = 'London, UK';
if (GBrowserIsCompatible()) {
var geocoder = new GClientGeocoder();
geocoder.getLocations(userLocation, function (locations) {
if (locations.Placemark)
{
var north = locations.Placemark[0].ExtendedData.LatLonBox.north;
var south = locations.Placemark[0].ExtendedData.LatLonBox.south;
var east = locations.Placemark[0].ExtendedData.LatLonBox.east;
var west = locations.Placemark[0].ExtendedData.LatLonBox.west;
var bounds = new GLatLngBounds(new GLatLng(south, west),
new GLatLng(north, east));
var map = new GMap2(document.getElementById("map_canvas"));
map.setCenter(bounds.getCenter(), map.getBoundsZoomLevel(bounds));
map.addOverlay(new GMarker(bounds.getCenter()));
}
});
}
</script>
</body>
</html>
The above example would render a map like the one below:
You would probably need to replace the static:
var userLocation = 'London, UK';
... with:
var userLocation = '<?php echo $go_Adress; ?>';
... as Fletcher suggested in another answer.
Note that the map will not show if the Google Client-side Geocoder cannot retreive the coordinates from the address. You may want to see how to handle this situation.
As for the API Key, you need to add it as a parameter to the <script> src that is calling the Maps API, as shown in the The "Hello, World" of Google Maps.
UPDATE:
I am updating the above example to use the Street View Panorama object. I hope that the example is self-explanatory, and that it gets you going in the right direction:
<!DOCTYPE html>
<html>
<head>
<meta http-equiv="content-type" content="text/html; charset=UTF-8"/>
<title>Google Maps API Demo - Street View</title>
<script src="http://maps.google.com/maps?file=api&v=2&sensor=false"
type="text/javascript"></script>
</head>
<body onunload="GUnload()">
<div id="map_canvas" style="width: 400px; height: 300px"></div>
<script type="text/javascript">
var userLocation = 'London, UK';
if (GBrowserIsCompatible()) {
var geocoder = new GClientGeocoder();
geocoder.getLocations(userLocation, function (locations) {
if (locations.Placemark)
{
var north = locations.Placemark[0].ExtendedData.LatLonBox.north;
var south = locations.Placemark[0].ExtendedData.LatLonBox.south;
var east = locations.Placemark[0].ExtendedData.LatLonBox.east;
var west = locations.Placemark[0].ExtendedData.LatLonBox.west;
var bounds = new GLatLngBounds(new GLatLng(south, west),
new GLatLng(north, east));
new GStreetviewPanorama(document.getElementById("map_canvas"),
{ latlng: bounds.getCenter() });
}
});
}
</script>
</body>
</html>
Screenshot from the above example:
2nd UPDATE:
You can enable both the street view and the map canvas, by "merging" the two examples above, as follows:
<!DOCTYPE html>
<html>
<head>
<meta http-equiv="content-type" content="text/html; charset=UTF-8"/>
<title>Google Maps API Demo - Street View with Map</title>
<script src="http://maps.google.com/maps?file=api&v=2&sensor=false"
type="text/javascript"></script>
</head>
<body onunload="GUnload()">
<div id="pano" style="width: 400px; height: 200px"></div>
<div id="map_canvas" style="width: 400px; height: 200px"></div>
<script type="text/javascript">
var userLocation = 'London, UK';
if (GBrowserIsCompatible()) {
var geocoder = new GClientGeocoder();
geocoder.getLocations(userLocation, function (locations) {
if (locations.Placemark)
{
var north = locations.Placemark[0].ExtendedData.LatLonBox.north;
var south = locations.Placemark[0].ExtendedData.LatLonBox.south;
var east = locations.Placemark[0].ExtendedData.LatLonBox.east;
var west = locations.Placemark[0].ExtendedData.LatLonBox.west;
var bounds = new GLatLngBounds(new GLatLng(south, west),
new GLatLng(north, east));
var map = new GMap2(document.getElementById("map_canvas"));
map.setCenter(bounds.getCenter(), map.getBoundsZoomLevel(bounds));
map.addOverlay(new GMarker(bounds.getCenter()));
new GStreetviewPanorama(document.getElementById("pano"),
{ latlng: bounds.getCenter() })
}
});
}
</script>
</body>
</html>
Screenshot for street view with map:
3rd UPDATE:
The Google Maps API does not have a direct method to link the movements of the street view with the map. Therefore this has to be handled manually. The following example makes the red marker draggable, and when dropped it moves the street view accordingly. In addition, each time the street view is updated, the marker is updated on the map as well.
To try this example, make sure that you insert the API Key in the <script> src parameters, and that you try it from the domain where you registered the key. Otherwise, it looks like the events do not work properly.
<!DOCTYPE html>
<html>
<head>
<meta http-equiv="content-type" content="text/html; charset=UTF-8"/>
<title>Google Maps API Demo - Street View with Map</title>
<script src="http://maps.google.com/maps?file=api&v=2&sensor=false"
type="text/javascript"></script>
</head>
<body onunload="GUnload()">
<div id="pano" style="width: 400px; height: 200px"></div>
<div id="map_canvas" style="width: 400px; height: 200px"></div>
<script type="text/javascript">
var userLocation = 'Copenhagen, Denmark';
if (GBrowserIsCompatible()) {
var geocoder = new GClientGeocoder();
geocoder.getLocations(userLocation, function (locations) {
if (locations.Placemark)
{
var north = locations.Placemark[0].ExtendedData.LatLonBox.north;
var south = locations.Placemark[0].ExtendedData.LatLonBox.south;
var east = locations.Placemark[0].ExtendedData.LatLonBox.east;
var west = locations.Placemark[0].ExtendedData.LatLonBox.west;
var bounds = new GLatLngBounds(new GLatLng(south, west),
new GLatLng(north, east));
var map = new GMap2(document.getElementById("map_canvas"));
map.setCenter(bounds.getCenter(), 14);
map.addOverlay(new GStreetviewOverlay());
var marker = new GMarker(bounds.getCenter(), { draggable: true });
map.addOverlay(marker);
var streetView = new GStreetviewPanorama(document.getElementById("pano"));
streetView.setLocationAndPOV(bounds.getCenter());
GEvent.addListener(marker, "dragend", function(latlng) {
streetView.setLocationAndPOV(latlng);
});
GEvent.addListener(streetView, "initialized", function(location) {
marker.setLatLng(location.latlng);
map.panTo(location.latlng);
});
}
});
}
</script>
</body>
</html>
Screenshot of the above example:
Getting the street view working nicely with the map could be the topic of another Stack Overflow question, as there are quite a few considerations to make.
You will need to include a javascript file which uses the GClientGeocoder object as in this example:
http://code.google.com/apis/maps/documentation/services.html#Geocoding_Object
The javascript will need to be passed through a PHP interpreter which injects the address into a javascript variable.
So, for the above example
var myAddress = '<?php echo $go_Adress; ?>';
showAddress(myAddress);
But first I recommend getting a very basic map shown.
http://code.google.com/apis/maps/documentation/introduction.html