So this set of code is pulling in locations (Latitude, Longitude, and Address) from a C# backend.
the backend code pulls data from a SQL database and inputs it into the ASP.Net DataField columns.
It was an enhancement to a prebuilt application to include Google Maps.
The locations pull just fine and stepping through it shows the latitude and longitude correctly.
The issue I'm having is that only one marker shows up which looks to be the last one.
Its as if each location isn't actually adding a new marker, but overwriting the current one which leaves the last location as the marker on the map.
What do I need to change to get each location to show up as a new marker?
<script type="text/javascript">
function locate() {
var inputList = GridView1.getElementsByTagName("td");
var rows = GridView1.getElementsByTagName("tr");
// var markers = inputList[0].innerHTML;
for (i = 1; i < rows.length; i++) {
var lat = rows[i].cells[2].innerHTML;
var lng = rows[i].cells[3].innerHTML;
var addr = rows[i].cells[1].innerHTML;
var mapOptions = {
center: new google.maps.LatLng(rows[1].cells[2].innerHTML, rows[1].cells[3].innerHTML),
zoom: 12,
mapTypeId: google.maps.MapTypeId.ROADMAP
};
var markers = [];
var infoWindow = new google.maps.InfoWindow();
var map = new google.maps.Map(document.getElementById("dvMap"), mapOptions);
var data = rows[i]
var myLatlng = new google.maps.LatLng(data.cells[2].innerHTML, data.cells[3].innerHTML);
var marker = new google.maps.Marker({
position: myLatlng,
map: map
});
markers.push(marker);
(function (marker, data) {
google.maps.event.addListener(marker, "click", function (e) {
infoWindow.setContent(data.cells[1].innerHTML);
infoWindow.open(map, marker);
});
})(marker, data);
}
}
</script>
<div id="dvMap" style="width: 500px; height: 500px">
</div>
</form>
</body>
</html>
You're creating the map and the marker within the same loop. i.e. you're creating a map with a single marker on it, rows times. You want to create the map outside of your loop. Something like this:
function locate() {
var rows = GridView1.getElementsByTagName("tr");
var mapOptions = {
center: new google.maps.LatLng(rows[1].cells[2].innerHTML, rows[1].cells[3].innerHTML),
zoom: 12,
mapTypeId: google.maps.MapTypeId.ROADMAP
};
var infoWindow = new google.maps.InfoWindow();
var map = new google.maps.Map(document.getElementById("dvMap"), mapOptions);
for (i = 1; i < rows.length; i++) {
var data = rows[i];
var myLatlng = new google.maps.LatLng(data.cells[2].innerHTML, data.cells[3].innerHTML);
var marker = new google.maps.Marker({
position: myLatlng,
map: map
});
(function (marker, data) {
google.maps.event.addListener(marker, "click", function (e) {
infoWindow.setContent(data.cells[1].innerHTML);
infoWindow.open(map, marker);
});
})(marker, data);
}
}
Related
I need to create info-window out of this code, I'm lacking of application logic and totally new to programming i use this open-source code
This code add users to the map along with their marker
function loadMarkers(data) {
for(key in data) {
var user = data[key];
xmartlabschat.addUser(user);
markers[key] = getMarker(user.lat, user.lng, user.name);
}
}
I tried to use the basic code for info-window
var infoWindow = new google.maps.InfoWindow(user.name);
markers[key].addListener('click', function(){
infoWindowMe.open(map,markers[key);
However this code turns all marker into same name with the user instead of different names since im clicking other users marker
Please Help
Here the screenshot I took
You can try this. Hope this helps.
var locations = [
['Location name', LAT, LON],
['...', ..., ...],
//...
];
var map = new google.maps.Map(document.getElementById('map'), {
zoom: 8,
center: new google.maps.LatLng(LAT, LON),
mapTypeId: google.maps.MapTypeId.ROADMAP
});
var infowindow = new google.maps.InfoWindow();
var marker, i;
for (i = 0; i < locations.length; i++) {
var lat = locations[i][1];
var lng = locations[i][2];
marker = new google.maps.Marker({
position: new google.maps.LatLng(lat, lng),
map: map,
}); // generates all the markers
google.maps.event.addListener(marker, 'click', (function(marker, i) {
return function() {
zIndex: 1000;
infowindow.setContent(locations[i][0]); // replace locations[i][0] with which data you want to show
infowindow.open(map, marker);
}
})(marker, i)); // generates corresponding info-window
}
I am implementing a Google Map on my webpage using JavaScript. Here my problem is map is coming with marker but it's background image is not showing at all. The screen shot is given below.
Here is my code:
<div id="dvMap" style="width:1000px; height:1000px;"></div>
<script type="text/javascript" src="http://maps.google.com/maps/api/js?sensor=false"></script>
<script>
var markers = [{"lat":"20.295728","lng":"85.844990"},{"title":"shilparamam","lat":"20.295728","lng":"85.844990","description":"Mumbai formerly Bombay, is the capital city of the Indian state of Maharashtra."}];
window.onload = function () {
var mapOptions = {
center: new google.maps.LatLng(markers[0].lat, markers[0].lng),
zoom: 10,
mapTypeId: google.maps.MapTypeId.ROADMAP
};
var map = new google.maps.Map(document.getElementById("dvMap"), mapOptions);
var infoWindow = new google.maps.InfoWindow();
var lat_lng = new Array();
var latlngbounds = new google.maps.LatLngBounds();
for (i = 0; i < markers.length; i++) {
var data = markers[i]
var myLatlng = new google.maps.LatLng(data.lat, data.lng);
lat_lng.push(myLatlng);
var marker = new google.maps.Marker({
position: myLatlng,
map: map,
title: data.title
});
latlngbounds.extend(marker.position);
(function (marker, data) {
google.maps.event.addListener(marker, "click", function (e) {
infoWindow.setContent(data.description);
infoWindow.open(map, marker);
});
})(marker, data);
}
map.setCenter(latlngbounds.getCenter());
map.fitBounds(latlngbounds);
}
</script>
Here I need the clear background image for the Google Map.
Why don't you use a simple iframe instead of such a long script? Below link provides you with simple steps to get an iframe code which you just need to embedd in your project or website using html div.
http://www.dummies.com/web-design-development/site-development/how-to-embed-a-google-map-with-iframe/
I have been playing around with the twitter API getting random tweets or even geo tagged tweets and also with the google maps API. However I want to combine this two and try and show geo tagged tweets on a google map. Here is my code for getting the geo tagged Tweets which work fine.
var geo = (geo.coordinates[0], geo.coordinates[1])
//var geo = (34.052234, -118.243685)
client.get('search/tweets', { q:string.teamname, geocode: geo, count: 5},
function searchTweets(err, data, response) {
for(var index in data.statuses){
var tweet = data.statuses[index];
console.log(tweet.text);
console.log(tweet.geo.coordinates)
}
});
On a different file, I generated a map based on Longitude and Latitude, and I had the understanding that once I had retrieved the coordinates for the tweets, I could represent the tweets on a Google Map in the same way. However, my code is not working. My question is, how would I combine both pieces of code to generate a map which is marked with geo located Tweets?
function initialize() {
var myLatlng = new google.maps.LatLng(geo.coordinates[0], geo.coordinates[1]);
var mapOptions = {
center: myLatlng
zoom: 10,
}
var map = new google.maps.Map(document.getElementById("map-canvas"), mapOptions);
var marker = new google.maps.Marker({
position: myLatlng,
map: map,
title:"Tweet});
var infowindow = new google.maps.InfoWindow({
content: 'Geo tagged Tweet',
maxWidth:200 });
infowindow.open(map,marker);
google.maps.event.addListener(marker, 'click', function() {
infowindow.open(map, marker); });
}
google.maps.event.addDomListener(window, 'load', initialize);
I would do something like this (untested - I'm just writing down some thoughts).
1) You should strip down init so that it just contains the map set up. Ensure map is declared outside of the function, and include a call to the function that fetches your data using the lat/lng data.
var map;
function initialize() {
var lat = geo.coordinates[0];
var lng = geo.coordinates[1]
var myLatlng = new google.maps.LatLng(lat, lng);
var mapOptions = { center: myLatlng, zoom: 10 }
map = new google.maps.Map(document.getElementById("map-canvas"), mapOptions);
getData(lat, lng, processData);
}
2) You wrap your data fetching code in a new function declaration, which accepts lat/lng data, and a callback.
function getData(lat, lng, callback) {
client.get('search/tweets', { q:string.teamname, geocode: geo, count: 5},
function searchTweets(err, data, response) {
callback(data.statuses);
}
)
};
3) Process the tweet information. For each tweet create a marker (add the marker to an array of markers) and update the map
function processData(data) {
var markers = [];
for (var i = 0, l = data.length; i < l; i++) {
var marker = new google.maps.Marker({
id: i,
position: myLatlng(data[i].geo.coordinates[0], data[i].geo.coordinates[1),
map: map,
title: "Tweet"
});
markers.push(marker);
var infowindow = new google.maps.InfoWindow({
content: data[i].text,
maxWidth: 200
});
infowindow.open(map, marker);
google.maps.event.addListener(marker, 'click', function() {
infowindow.open(map, marker);
});
}
}
I have a Google map. I created some markers, but I can not hide these markers. I looked at this document. I have one function, but it failed.
function LoadMap () {
var markers = JSON.parse('<%=Stations() %>');
var mapOptions = {
center: new google.maps.LatLng(markers[0].lat, markers[0].lng),
zoom: 5,
mapTypeId: google.maps.MapTypeId.ROADMAP
};
var infoWindow = new google.maps.InfoWindow();
map2 = new google.maps.Map(document.getElementById("map_canvas2"), mapOptions2);
for (i = 0; i < markers.length; i++) {
var data = markers[i]
var myLatlng = new google.maps.LatLng(data.lat, data.lng);
var marker = new google.maps.Marker({
position: myLatlng,
map: map2,
title:"Hello",
});
(function (marker, data) {
google.maps.event.addListener(marker, "click", function (e) {
infoWindow.setContent(data.description);
infoWindow.open(map, marker);
icon: InitIcon
});
}(marker, data);
}
}
You need to apply the setMap(null) to your Array of markers.
If your markers variable contains all your markers, you need to loop through each markers and delete each of them using
markers[i].setMap(null);
as shown on your sample
BTW, your code contains somme errors, like a missing ; after var data = markers[i]
This is what I have... PHP pulls down 10 pairs of lat/long from an API url which I have managed to get working okay but I cannot seem to plot them on a map with multiple markers labelled 1-10.
My php code:
<?php
// Loading Domus API
$url_search = 'http://url/site/go/api/search';
$xml_search = #simplexml_load_file($url_search) or die ("no file loaded") ;
//Displaying latitude and longutude
$house = json_encode($house);
}; ?>
JavaScript bit:
var locations = "<?php foreach($xml_search->property as $house) { echo $lat = $house->address->latitude , $long = $house->address->longitude;}; ?>";
var map = new google.maps.Map(document.getElementById('map'), {
zoom: 10,
center: new google.maps.LatLng(37.0625,-95.677068),
mapTypeId: google.maps.MapTypeId.ROADMAP
});
var infowindow = new google.maps.InfoWindow();
var marker, i;
for (i = 0; i < locations.length; i++) {
marker = new google.maps.Marker({
position: new google.maps.LatLng(locations[i][1], locations[i][2]),
map: map
});
google.maps.event.addListener(marker, 'click', (function(marker, i) {
return function() {
infowindow.setContent(locations[i][0]);
infowindow.open(map, marker);
}
})(marker, i));
}
Which is then needs to be displayed in here
<div id="map" style="width: 500px; height: 400px"></div>
But I just get a blank page, of course.
Okay, I've managed to figure it out.
Here is my php code in the head part
<?php
// Loading Domus API
$url_search = 'http://url/site/go/api/search';
$xml_search = #simplexml_load_file($url_search) or die ("no file loaded") ;?>
Then I have my javascript
// Load property ID followed by Lat and Long for each house (total of 10)
var locations = [<?php foreach($xml_search->property as $house) {
echo '['.$house->id. ',' .$house->address->latitude. ',' .$house->address->longitude.'],';
} ?>];
var map = new google.maps.Map(document.getElementById('map'), {
zoom: 15,
center: new google.maps.LatLng(0, 0),
mapTypeId: google.maps.MapTypeId.ROADMAP
});
var infowindow = new google.maps.InfoWindow();
var marker, i;
var markers = new Array();
for (i = 0; i < locations.length; i++) {
marker = new google.maps.Marker({
position: new google.maps.LatLng(locations[i][1], locations[i][2]),
map: map
});
markers.push(marker);
google.maps.event.addListener(marker, 'click', (function(marker, i) {
return function() {
infowindow.setContent(locations[i][0]);
infowindow.open(map, marker);
}
})(marker, i));
}
function AutoCenter() {
// Create a new viewpoint bound
var bounds = new google.maps.LatLngBounds();
// Go through each...
$.each(markers, function (index, marker) {
bounds.extend(marker.position);
});
// Fit these bounds to the map
map.fitBounds(bounds);
}
AutoCenter();
Works beautifully, now just need to set up labelled markers and I am good to go.