I'm using the following code to convert an address to longitude and latitude. The code is taken from http://www.phpmoot.com/php-get-latitudelongitude-from-an-address-with-google-map/
$address = '201 S. Division St., Ann Arbor, MI 48104'; // Google HQ
$prepAddr = str_replace(' ','+',$address);
$geocode=file_get_contents('http://maps.google.com/maps/api/geocode/json?address='.$prepAddr.'&sensor=false');
$output= json_decode($geocode);
$lat = $output->results[0]->geometry->location->lat;
$long = $output->results[0]->geometry->location->lng;
echo $address.'<br>Lat: '.$lat.'<br>Long: '.$long;
This works fine on my previous hosting, but when I moved the site to TSO host, it no longer works. What reasons might there be for this?
I've tried using a browser api key in the url and a server api key and that doesn't work either. like this
http://maps.google.com/maps/api/geocode/json?address='.$prepAddr.'&key=****API_KEY_GOES_HERE****&sensor=false
Any help welcome. TSO Host support can't seem to figure it out.
Just to be sure it is server related I would recommend you to try using the JS in page. Please try to implement below code with changing your div ID and KEY. Also pass the address variable you have to related place.
<script>
function initialize() {
var center;
var geocoder = new google.maps.Geocoder();
geocoder.geocode( { 'address': $AdressYouGotFromThePost}, function(results, status) {
if (status == google.maps.GeocoderStatus.OK) {
var mycenter = new google.maps.LatLng(results[0].geometry.location.lat(),results[0].geometry.location.lng());//
var mapProp = {
center:mycenter,
zoom:11
};
var map=new google.maps.Map(document.getElementById("YOURDIVID"),mapProp);
var request = {
location: mycenter,
radius: '20000',
types: ['bar,night_club,cafe,museum,movie_theater,zoo,aquapark']
};
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++) {
var place = results[i];
createPhotoMarker(results[i]);
}
}
}
function createPhotoMarker(place) {
var photos = place.photos;
if (!photos) {
return;
}
var marker = new google.maps.Marker({
map: map,
position: place.geometry.location,
title: place.name
//icon: photos[0].getUrl({'maxWidth': 55, 'maxHeight': 55})
});
//console.log(photos[0].getUrl({'maxWidth': 105, 'maxHeight': 105}));
var contenthtml = "<p>"+place.name+"</p><img src="+photos[0].getUrl({'maxWidth': 105, 'maxHeight': 105})+" width='105px'/>";
var infowindow = new google.maps.InfoWindow({
content:contenthtml
});
google.maps.event.addListener(marker,'click',function() {
map.setZoom(17);
map.setCenter(marker.getPosition());
infowindow.open(map,marker);
});
}
});
}
</script>
<script async="" defer="" src="https://maps.googleapis.com/maps/api/js?key=YOURACCESSKEYHERE&callback=initialize&libraries=places">
Using the php method to convert the address to longitude and latitude like this example http://www.phpmoot.com/php-get-latitudelongitude-from-an-address-with-google-map/
was causing the api limits to be reached on the TSO host shared cloud server. Using an API key didn't seem to make any difference. The solution was to not use the php method and instead use the Javascript method as per Googles example here - https://developers.google.com/maps/documentation/javascript/examples/geocoding-simple
Related
I did my searching but unfortunately didnt find relevant solution. I want to do it by using codeigniter google map library. i am following this
link
But it is just showing starting and ending point, it's not creating multiple pins like
This is making multiple pins with polyline but i want routing like:
with multiple pins as shown in polyline map picture.. Is it posible to get multiple directions with multiple pins ??
I tried it but my trick couldn't work. i tried it by using while loop and i incremented the variable before ending point to make my direction like
1st lat, long : starting point
2nd lat, long : ending point
2nd lat, long : starting point
3rd lat, long : ending point
3rd lat, long : starting point
4th lat, long : ending point
But it's only making 1st and last ending point for start and end direction
Here is my controller function
##Load library
$this->load->library('googlemaps');
## Getting data from db
$final_data['final_data'] = $this->Main_manager->getAllEmailLogsById($id);
$email = $final_data['final_data'][0]['email'];
$date = $final_data['final_data'][0]['date'];
$file = 'assets/email_logs/'.$email.'-'.str_replace(' ','-',$date).'.txt';
## Getting lat long data from txt file
$logData = file_get_contents($file);
$logData = json_decode($logData, true);
$marker = array();
$logs = count($logData['logs']);
$config['center'] = $final_data['final_data'][0]['lat'].','. $final_data['final_data'][0]['long'];
$config['zoom'] = 'auto';
$i=0;
while($i<$logs-1):
$config['position'] = $logData['logs'][$i]['lat'].','. $logData['logs'][$i]['long'];
$config['infowindow_content'] = $logs['email'];
$config['animation'] = 'DROP';
$config['draggable'] = FALSE;
$config['directions'] = TRUE;
$config['directionsStart'] = $logData['logs'][$i]['lat'].','. $logData['logs'][$i]['long'];
$i++;
$config['directionsEnd'] = $logData['logs'][$i]['lat'].','. $logData['logs'][$i]['long'];
$config['directionsDivID'] = 'directionsDiv';
endwhile;
## initialize the map
$this->googlemaps->initialize($config);
##create map
$final_data['map'] = $this->googlemaps->create_map();
$this->load->view('administrator/header');
$this->load->view('administrator/view_logs_detail', $final_data);
It seems like you need to use google's DirectionsService.
This service Google map API key to draw routes
Get google key from here login to google account and generate key for your project
Working Demo
HTML
<h1>Google Map direction service</h1>
<div id="map"></div>
CSS
html,
body,
#map {
height: 100%;
width: 100%;
margin: 0px;
padding: 0px
}
JS:
var map;
var directionsDisplay;
var directionsService = new google.maps.DirectionsService();
var locations = [
['Shahrah-e-Faisal, Karachi, Pakistan', 24.8678, 67.0842, 1],
['Tariq Rd, Karachi, Pakistan', 24.8727, 67.0604, 2],
['Service Lane, Karachi, Pakistan', 24.8161, 67.0212, 3]
];
function initialize() {
directionsDisplay = new google.maps.DirectionsRenderer();
var map = new google.maps.Map(document.getElementById('map'), {
zoom: 10,
center: new google.maps.LatLng(24.8678, 67.0842),
});
directionsDisplay.setMap(map);
var infowindow = new google.maps.InfoWindow();
var marker, i;
var request = {
travelMode: google.maps.TravelMode.DRIVING
};
for (i = 0; i < locations.length; i++) {
marker = new google.maps.Marker({
position: new google.maps.LatLng(locations[i][1], locations[i][2]),
});
google.maps.event.addListener(marker, 'click', (function (marker, i) {
return function () {
infowindow.setContent(locations[i][0]);
infowindow.open(map, marker);
}
})(marker, i));
if (i == 0) request.origin = marker.getPosition();
else if (i == locations.length - 1) request.destination = marker.getPosition();
else {
if (!request.waypoints) request.waypoints = [];
request.waypoints.push({
location: marker.getPosition(),
stopover: true
});
}
}
directionsService.route(request, function (result, status) {
if (status == google.maps.DirectionsStatus.OK) {
directionsDisplay.setDirections(result);
}
});
}
google.maps.event.addDomListener(window, "load", initialize);
I'm developing a web page with a Google Maps API v3. I currently have a functional map and search bar. I need to be able to display the distance from a searched address to the nearest placemark on one of the KML files on the map. How can I do this?
Here is the code for the page:
<script type="text/javascript">
var geocoder;
var map;
var marker;
var layers = [];
function initialize() {
geocoder = new google.maps.Geocoder ();
var latlng = new google.maps.LatLng (41, -73.4);
var myOptions = {
zoom: 7,
center: latlng,
mapTypeId: google.maps.MapTypeId.ROADMAP
}
map = new google.maps.Map(document.getElementById("map_canvas"),
myOptions);
marker = new google.maps.Marker({map:map});
layers[0] = new google.maps.KmlLayer('http://dl.dropbox.com/u/80233620/South-and-North-County-Trailway.kml',
{preserveViewport: true});
layers[1] = new google.maps.KmlLayer('http://www.nyc.gov/html/dot/downloads/misc/cityracks.kml',
{preserveViewport: true});
layers[2] = new google.maps.KmlLayer('http://dl.dropbox.com/u/80233620/NWS%20Radar%20Images.kmz',
{preserveViewport: true});
for (var i = 0; i < layers.length; i++) {
layers[i].setMap(map);
}
}
function codeAddress () {
var address = document.getElementById ("address").value;
geocoder.geocode ( { 'address': address}, function(results, status) {
if (status == google.maps.GeocoderStatus.OK) {
map.setCenter(results [0].geometry.location);
marker.setPosition(results [0].geometry.location);
map.setZoom(14);
}
else {
alert("Geocode was not successful for the following reason: " + status);
}
});
}
function toggleLayer(i) {
if(layers[i].getMap() === null) {
layers[i].setMap(map);
}
else {
layers[i].setMap(null);}
}
</script>
You cannot access the data in KML layers like that
https://developers.google.com/maps/documentation/javascript/layers#KMLLayers
Because KML may include a large number of features, you may not access
feature data from the KmlLayer object directly. Instead, as features
are displayed, they are rendered to look like clickable Maps API
overlays.
Instead you can process the XML and add markers manually, then use the geometry library and computeDistanceBetween() to get the distance. I usually multiply the distance by some number to account for turns (The distance formula gets a straight line distance). I believe around 1.2 was the most accurate.
I am using Google Maps V3 API and using its Geocoder to do reverse geocoding of the point on the map where the user clicks on.
Load the geocoding function when DOM is fully loaded
$(function() {
reverse_geocode(40.714224,-73.961452);
});
Function that does the reverse geocoding:
function reverse_geocode(lat,lng) {
var geocoder = new google.maps.Geocoder();
var latlng = new google.maps.LatLng(10,-10);
geocoder.geocode({'latLng': latlng}, function(results, status) {
if (status == google.maps.GeocoderStatus.OK) {
alert('asdasd');
} else {
alert("Geocoder failed due to: " + status);
}
});
}
If I call the reverse_geocode function when the page first loads, everything works fine and the alert() is called.
However, if I call reverse_geocode() only when triggered by a rightclick on the map followed by a mouseclick on a div, using the code below, nothing happens! Any idea what went wrong?
google.maps.event.addListener(map, "rightclick", function(event) {
//some code not shown
$("#info_rightclick_top").click(function(e) {
info_ok_handleclick();
});
});
function info_ok_handleclick() {
$("#info_ok").click(function(e) {
var lat = marker_search_location.getPosition().lat();
var lng = marker_search_location.getPosition().lng();
var latlng = lat + "_" + lng;
reverse_geocode(10,-10);
// some code hidden
});
Using this bellow code you can search a location by keywords.
<?php
include_once("include/GoogleMap.php");
include_once("include/JSMin.php");
$mapcity="India";
$mapdesc="description about this map";
$MAP_OBJECT = new GoogleMapAPI();
$MAP_OBJECT->_minify_js = isset($_REQUEST["min"])?FALSE:TRUE;
$MAP_OBJECT->addMarkerByAddress($mapcity,"Map name", $mapdesc);
$MAP_OBJECT->enableStreetViewControls();
?>
<html>
<head>
<?=$MAP_OBJECT->getHeaderJS();?>
<?=$MAP_OBJECT->getMapJS();?>
</head>
<body>
<?=$MAP_OBJECT->printOnLoad();?>
<?=$MAP_OBJECT->setMapType(ROADMAP);?>
<?=$MAP_OBJECT->printMap();?>
<?=$MAP_OBJECT->printSidebar();?>
</body>
</html>
I'm connecting a Google Map to a MySQL database to list distributors all over the world, and I seem to be having a few issues.
Sometimes the page itself will not load at all in Firefox (v4 on Mac). It's temperamental on my machine (FF v3.6 Mac) and a Windows machine (FF v4 Win 7), ok in Safari/Opera, doesn't load at all in IE 9 (Win 7). Not sure if it's a network issue or code.
Load time is pretty slow. Might be because the map covers the whole page (will create a square block to place it in).
The URL of the page is here and I used the code from Sean Feeney's page.
The code I have is:
<script src="http://maps.google.com/maps?file=api&v=2&key=<I entered my key here>" type="text/javascript"></script>
<body onUnload="GUnload()">
<div id="map" style="position:absolute;top:0px;bottom:0px;left:0;right:0;"></div>
</body>
<script type="text/javascript">
//<![CDATA[
var map;
var latlngbounds;
if (GBrowserIsCompatible()) {
function createMarker(point, address) {
var marker = new GMarker(point);
var html = address;
GEvent.addListener(marker, 'click', function() {
marker.openInfoWindowHtml(html);
});
return marker;
}
function extendBounding(point) {
latlngbounds.extend(point);
var zoom = map.getBoundsZoomLevel(latlngbounds);
if (zoom < 10) {
zoom = 12;
}
map.setCenter(latlngbounds.getCenter(), zoom);
}
}
map = new GMap2(document.getElementById("map"));
map.addControl(new GLargeMapControl3D());
map.addControl(new GMapTypeControl());
latlngbounds = new GLatLngBounds();
GDownloadUrl("genxml.php", function(data) {
var xml = GXml.parse(data);
var markers = xml.documentElement.getElementsByTagName("marker");
for (var i = 0; i < markers.length; i++) {
var address = markers[i].getAttribute("address");
var point = new GLatLng(parseFloat(markers[i].getAttribute("lat")),
parseFloat(markers[i].getAttribute("lng")));
var marker = createMarker(point, address);
map.addOverlay(marker);
extendBounding(point);
}
});
}
//]]>
</script>
The code that gets the data is the same as the example.
Any ideas as to why it doesn't always load in the browsers, and why it seems to take a while to load?
Thanks,
Adrian
Ideally you should wrap the code that loads the map inside a document ready or window load event.
I notice that your code is not nested properly inside the GBrowserIsCompatible() block so please fix that.
As far as I remember, Google maps API v2 requires you to call the setCenter() method before doing any operations on the map. So to begin with, set the center to (0, 0) immediately after creating the map.
I notice that you're downloading XML data before you add markers to the map. You must take into account the time taken by the server to serve the XML data. If you've called the setCenter() before downloading the XML, the map will display while the XML downloads asynchronously.
Inside the code that handles the XML data: when you add a marker, do not call setCenter() immediately. Doing so will cause the function to be called 1000 times if you have 1000 markers in your XML. Instead, just call latlngbounds.extend(point). Once you have iterated the loop, calculate the zoom/center and call setCenter(). This way you will end up calling this function only twice.
Edit
I've figured out what the problem is. The genxml.php randomly returns the string Google Geo error 620 occurred which cannot be parsed as XML which raises JavaScript errors and no markers are shown. Better have a look at the code of that file and see why this happens randomly. On other times when that file actually returns valid XML, the markers appear as expected.
It appears Google recently tightened geocoding requests. If you send 10 too fast, it cuts you off with 620 error. The solution they recommend is adding a dynamic timer. Other stackoverflow posts suggested a 0.25 second static timer was good enough, but I've found Google's recommendation of using a while loop that increments the timer value as needed works better. For example:
// Initialize delay in geocode speed
public $delay = 0;
public function lookup(arguments)
{
$geocode_pending = true;
while ($geocode_pending) {
$search = //address string to search;
$response = $this->performRequest($search, 'xml');
$xml = new SimpleXMLElement($response);
$status = (int) $xml->Response->Status->code;
switch ($status) {
case self::G_GEO_SUCCESS:
require_once('placemark.php');
$placemarks = array();
foreach ($xml->Response->Placemark as $placemark)
$placemarks[] = Placemark::FromSimpleXml($placemark);
$geocode_pending = false;
return $placemarks;
case self::G_GEO_TOO_MANY_QUERIES:
$delay += 100000;
case self::G_GEO_UNKNOWN_ADDRESS:
case self::G_GEO_UNAVAILABLE_ADDRESS:
return array();
default:
throw new Exception(sprintf('Google Geo error %d occurred', $status));
}
usleep($delay);
}
}
You can run your map code with window.load after everything is loaded:
jQuery(document).ready(function initAutocomplete() {
var p_lag=$('#longitude').val();
var p_lat=$('#latitude').val();
if(p_lat==''){
var p_lat=20.593684;
}
if(p_lag==''){
var p_lag=78.96288000000004 ;
}
var myLatLng = {lat: p_lat,lng: p_lag};
var map = new google.maps.Map(document.getElementById('dvMap'), {
center: myLatLng,
zoom: 5,
mapTypeId: google.maps.MapTypeId.ROADMAP
});
var marker = new google.maps.Marker({
position: myLatLng,
draggable: true,
map: map,
title: 'Map'
});
// Create the search box and link it to the UI element.
var input = document.getElementById('pac-input');
var searchBox = new google.maps.places.SearchBox(input);
//map.controls[google.maps.ControlPosition.TOP_LEFT].push(input);
// Bias the SearchBox results towards current map's viewport.
map.addListener('bounds_changed', function () {
searchBox.setBounds(map.getBounds());
});
//Click event for getting lat lng
google.maps.event.addListener(map, 'click', function (e) {
$('input#latitude').val(e.latLng.lat());
$('input#longitude').val(e.latLng.lng());
});
google.maps.event.addListener(marker, 'dragend', function (e) {
$('input#latitude').val(e.latLng.lat());
$('input#longitude').val(e.latLng.lng());
});
var markers = [];
// [START region_getplaces]
// Listen for the event fired when the user selects a prediction and retrieve
// more details for that place.
searchBox.addListener('places_changed', function () {
var places = searchBox.getPlaces();
if (places.length == 0) {
return;
}
// Clear out the old markers.
/*markers.forEach(function (marker) {
marker.setMap(null);
});*/
markers = [];
// For each place, get the icon, name and location.
var bounds = new google.maps.LatLngBounds();
places.forEach(function (place) {
var icon = {
url: place.icon,
size: new google.maps.Size(71, 71),
origin: new google.maps.Point(0, 0),
anchor: new google.maps.Point(17, 34),
scaledSize: new google.maps.Size(25, 25)
};
// Create a marker for each place.
markers.push(new google.maps.Marker({
map: map,
icon: icon,
title: place.name,
position: place.geometry.location
}));
$('#latitude').val(place.geometry.location.lat());
$('#longitude').val(place.geometry.location.lng());
marker.setPosition(place.geometry.location);
if (place.geometry.viewport) {
// Only geocodes have viewport.
bounds.union(place.geometry.viewport);
} else {
bounds.extend(place.geometry.location);
}
map.fitBounds(bounds);
});
});
}
);
GOOGLE MAPS API V3 is what i'm trying to use.
I have all the coordinates in mysql. I just, for example, need to take 5 listings and put them on a map but I'd like to be able to find the center point based on the multiple coordinates I'd like to display, and the zoom level as well. Yeah know?
I'm having the time of my life with something that I know is terribly simple, I just can't figure this API out. I'll paypal $20 to anyone who can help me.
//select * from mysql limit 5
//ok great we got 5 results, great job, format the 5 results so google maps like it, [name,lat,lng] whatever.
//put them on the map and let them be clickable so i can put stuff in the infowindow thing
//make the map adjust to the proper zoom level and center point
UPDATE
This is what i was looking for, hope this helps others.
credit to [Chris B] for the common sense math formula for getting the center coord, the sw cord is the lowest lat and lon, and the ne coord is the greatest lat and lon
sort($lat)&&sort($lon);
$r['c'] = array_sum($lat)/count($lat).', '.array_sum($lon)/count($lon);
$r['ne'] = $lat[count($lat)-1].', '.$lon[count($lon)-1];
$r['sw'] = $lat[0].', '.$lon[0];
var myOptions = {zoom:4,center: new google.maps.LatLng(<?php echo $r['c']; ?>),mapTypeId:google.maps.MapTypeId.ROADMAP}
var map = new google.maps.Map(document.getElementById("map_canvas"),myOptions);
<?php foreach($x as $l) echo 'new google.maps.Marker({position:new google.maps.LatLng('.$l['lat'].','.$l['lon'].'),map:map,clickable:true});'; ?>
map.fitBounds(new google.maps.LatLngBounds(new google.maps.LatLng(<?php echo $r['sw']; ?>),new google.maps.LatLng(<?php echo $r['ne']; ?>)));
If an average/weighted center point is acceptable - you could just average all the latitudes, and average all the longitudes:
$latTotal = 0;
$lngTotal = 0;
foreach ($markers as $marker) {
$latTotal += $marker['lat'];
$lngTotal += $marker['lng'];
}
$centerLat = $latTotal/count($markers);
$centerLng = $lngTotal/count($markers);
For the rest of it, there are some good V3 tutorials on Google.
I was using Google Maps v3 a month or two back, but switched to v2 later on. However, I had the same problem as you so I wrote a MarkerManager class for API v3. I can't find the latest version of my class, but I did find a, hopefully, working one. You can get it here.
I have to warn you though - it's not optimazed at all and is not using overlays, so when I tried putting 50+ markers in the manager and toggled the hide/show the class is sloooow... But maybe you can have some success with it.
Usage example:
var map = new google.maps.Map(document.getElementById('MapLayerId'), {
zoom: 7,
position: new google.maps.LatLng(latitude, longitude),
mapTypeId: google.maps.MapTypeId.ROADMAP
});
var marker1 = new google.maps.Marker({
position: new google.maps.LatLng(latitude, longitude),
map: map
});
var marker2 = new google.maps.Marker({
position: new google.maps.LatLng(latitude, longitude),
map: map
});
var manager = new MarkerManager(map, {fitBounds: true});
manager.add(marker1);
manager.add(marker2);
manager.show();
GDownloadUrl in V2 equivalent downloadUrl in GOOGLE MAPS API V3
How to load all the coordinates in database(Mysql or Sql).
var myLatlng = new google.maps.LatLng("37.427770" ,"-122.144841");
var myOptions = {zoom: 15, center: myLatlng, mapTypeId: google.maps.MapTypeId.ROADMAP,}
map = new google.maps.Map(document.getElementById("map_canvas"), myOptions);
var url='marker.php?arg1=x&arg2=y...';
downloadUrl(url, function(data) {
var markers = data.documentElement.getElementsByTagName("marker");
for (var i = 0; i < markers.length; i++) {
var latlng = new google.maps.LatLng(parseFloat(markers[i].getAttribute("lat")),
parseFloat(markers[i].getAttribute("lng")));
var marker = new google.maps.Marker({position: latlng, map: map});
}
});
function createXmlHttpRequest() {
try {
if (typeof ActiveXObject != 'undefined') {
return new ActiveXObject('Microsoft.XMLHTTP');
} else if (window["XMLHttpRequest"]) {
return new XMLHttpRequest();
}
} catch (e) {
changeStatus(e);
}
return null;
};
function downloadUrl(url, callback) {
var status = -1;
var request = createXmlHttpRequest();
if (!request) {
return false;
}
request.open('GET', url);
request.onreadystatechange = function() {
if (request.readyState == 4) {
try {
status = request.status;
} catch (e) {
// Usually indicates request timed out in FF.
}
if (status == 200) {
var s=request.responseText;
callback( xmlParse(s) );
}
}
}
try {
request.send(null);
}catch (e) {
changeStatus(e);
}
};
function xmlParse(str) {
if (typeof ActiveXObject != 'undefined' && typeof GetObject != 'undefined') {
var doc = new ActiveXObject('Microsoft.XMLDOM');
doc.loadXML(str);
return doc;
}
if (typeof DOMParser != 'undefined') {
return (new DOMParser()).parseFromString(str, 'text/xml');
}
return createElement('div', null);
}
Have you checked out the official google map PHP/Mysql tutorial?
http://code.google.com/apis/maps/articles/phpsqlajax.html
Try this algorithm for finding the centroid of a polygon:
http://tog.acm.org/resources/GraphicsGems/gemsiv/centroid.c